9C402.16.ppt
•Download as PPT, PDF•
0 likes•2 views
This document contains a lecture on analyzing and designing rectangular beams. It discusses stress block parameters, determining the depth of the neutral axis, and calculating the lever arm. Key points covered include defining stress block parameters, deriving an equation to calculate the neutral axis depth, and explaining that the lever arm is the distance between the lines of action of the compression and tension forces. Maximum depth of the neutral axis is also limited to avoid concrete failure before steel yields.
Report
Share
Report
Share
Recommended
Design of Structures Chapter2.pptx
This document discusses the analysis of singly and doubly reinforced concrete beam sections. It provides definitions and design approaches for singly reinforced, doubly reinforced, and flanged beam sections. The key steps in the design process are outlined, including calculating loads and moments, checking for section type, sizing tension and compression reinforcement, and designing shear reinforcement. Design examples are provided for a singly reinforced and a doubly reinforced concrete beam according to BS 8110 design code standards.
Design of Structures Chapter2.pdf
This document discusses the analysis of singly and doubly reinforced concrete beam sections. It begins by defining singly reinforced sections as having tension reinforcement only, while doubly reinforced sections have reinforcement in both tension and compression zones. Design steps are provided for both section types, including calculating loads, moments, reinforcement areas, and shear reinforcement. Formulas and assumptions used in the design process are also outlined. The goal is for students to learn to properly design reinforced concrete beam sections based on given structural loads and material properties.
IARE_SOM_II_PPT.pdf
This document provides information about stresses and deflections in thin cylindrical shells. It discusses the following key points:
- Thin cylindrical shells have constant hoop and longitudinal stresses over the thickness, while thick shells have variable stresses.
- The hoop stress in a thin cylindrical shell subjected to internal pressure is equal to pressure times internal diameter divided by 2 times thickness.
- The longitudinal stress is equal to pressure times internal diameter divided by 4 times thickness.
- The circumferential and longitudinal strains in a thin cylindrical shell can be calculated from the hoop and longitudinal stresses. This leads to changes in the internal diameter and length of the shell.
Design of SR Framed str beam.ppt
The document discusses different methods of concrete design including working stress method, limit state method, ultimate load method, and probabilistic method. It then focuses on explaining the limit state method. Key points include:
- The limit state method aims to achieve an acceptable probability that a structure will not reach an unsafe limit state during its lifetime.
- Structures must withstand all reliably expected loads over lifetime and satisfy serviceability requirements like deflection and cracking limits.
- Important limit states to consider in design are flexure, compression, shear, and torsion failure modes.
- Examples are given of analyzing and designing reinforced concrete beam sections using the limit state method. Design calculations for moment of resistance are shown.
Conceps of RCC-PCC.pptx
This document discusses concepts related to the design of concrete beams including:
1. It introduces concepts like bending, shear, tension and compression as they relate to beam design.
2. It provides formulas for calculating reactions, shear forces, and bending moments in simply supported beams under different loading conditions.
3. It explains concepts like the neutral axis, stress blocks, and strain diagrams that are important to beam design.
4. It discusses factors that influence the strength of beams like the moment of inertia and reinforcement ratio.
5. It compares working stress and limit state methods of design.
singly-reinforced-beam.ppt
This document discusses the limit state method for designing reinforced concrete beams. It describes key concepts like limit states, stress-strain curves for concrete and steel, and the parameters used to calculate the depth of the neutral axis and moment of resistance. There are three main types of reinforced concrete beams discussed: singly reinforced, doubly reinforced, and singly or doubly reinforced flanged beams. The document focuses on the design and analysis of singly reinforced beams, providing examples of determining the moment of resistance of a given cross-section, as well as designing a beam to resist a specific bending moment.
Shear of thin walled sections.pdf
This document provides an overview of shear loading and shear flow distribution in aircraft wing structures. It discusses shear in open and closed beam sections, including how to determine shear flow distribution and shear centres. An example problem demonstrates calculating the shear flow distribution for a boxed beam under shear loading applied at the shear centre. The document emphasizes that shear loading is an important consideration for wing structures and analyzing shear flow distribution is necessary to understand stresses.
Mechanics of solids 1 lecture-1
This is first or introductory lecture of Mechanics of Solids-1 as per curriculum formulated by Higher Education Commission and Pakistan Engineering Council
Recommended
Design of Structures Chapter2.pptx
This document discusses the analysis of singly and doubly reinforced concrete beam sections. It provides definitions and design approaches for singly reinforced, doubly reinforced, and flanged beam sections. The key steps in the design process are outlined, including calculating loads and moments, checking for section type, sizing tension and compression reinforcement, and designing shear reinforcement. Design examples are provided for a singly reinforced and a doubly reinforced concrete beam according to BS 8110 design code standards.
Design of Structures Chapter2.pdf
This document discusses the analysis of singly and doubly reinforced concrete beam sections. It begins by defining singly reinforced sections as having tension reinforcement only, while doubly reinforced sections have reinforcement in both tension and compression zones. Design steps are provided for both section types, including calculating loads, moments, reinforcement areas, and shear reinforcement. Formulas and assumptions used in the design process are also outlined. The goal is for students to learn to properly design reinforced concrete beam sections based on given structural loads and material properties.
IARE_SOM_II_PPT.pdf
This document provides information about stresses and deflections in thin cylindrical shells. It discusses the following key points:
- Thin cylindrical shells have constant hoop and longitudinal stresses over the thickness, while thick shells have variable stresses.
- The hoop stress in a thin cylindrical shell subjected to internal pressure is equal to pressure times internal diameter divided by 2 times thickness.
- The longitudinal stress is equal to pressure times internal diameter divided by 4 times thickness.
- The circumferential and longitudinal strains in a thin cylindrical shell can be calculated from the hoop and longitudinal stresses. This leads to changes in the internal diameter and length of the shell.
Design of SR Framed str beam.ppt
The document discusses different methods of concrete design including working stress method, limit state method, ultimate load method, and probabilistic method. It then focuses on explaining the limit state method. Key points include:
- The limit state method aims to achieve an acceptable probability that a structure will not reach an unsafe limit state during its lifetime.
- Structures must withstand all reliably expected loads over lifetime and satisfy serviceability requirements like deflection and cracking limits.
- Important limit states to consider in design are flexure, compression, shear, and torsion failure modes.
- Examples are given of analyzing and designing reinforced concrete beam sections using the limit state method. Design calculations for moment of resistance are shown.
Conceps of RCC-PCC.pptx
This document discusses concepts related to the design of concrete beams including:
1. It introduces concepts like bending, shear, tension and compression as they relate to beam design.
2. It provides formulas for calculating reactions, shear forces, and bending moments in simply supported beams under different loading conditions.
3. It explains concepts like the neutral axis, stress blocks, and strain diagrams that are important to beam design.
4. It discusses factors that influence the strength of beams like the moment of inertia and reinforcement ratio.
5. It compares working stress and limit state methods of design.
singly-reinforced-beam.ppt
This document discusses the limit state method for designing reinforced concrete beams. It describes key concepts like limit states, stress-strain curves for concrete and steel, and the parameters used to calculate the depth of the neutral axis and moment of resistance. There are three main types of reinforced concrete beams discussed: singly reinforced, doubly reinforced, and singly or doubly reinforced flanged beams. The document focuses on the design and analysis of singly reinforced beams, providing examples of determining the moment of resistance of a given cross-section, as well as designing a beam to resist a specific bending moment.
Shear of thin walled sections.pdf
This document provides an overview of shear loading and shear flow distribution in aircraft wing structures. It discusses shear in open and closed beam sections, including how to determine shear flow distribution and shear centres. An example problem demonstrates calculating the shear flow distribution for a boxed beam under shear loading applied at the shear centre. The document emphasizes that shear loading is an important consideration for wing structures and analyzing shear flow distribution is necessary to understand stresses.
Mechanics of solids 1 lecture-1
This is first or introductory lecture of Mechanics of Solids-1 as per curriculum formulated by Higher Education Commission and Pakistan Engineering Council
Column Interaction Diagram construction
The document provides information on constructing interaction diagrams for reinforced concrete columns. It defines an interaction diagram as a graph showing the relationship between axial load (Pu) and bending moment (Mu) for different failure modes of a column section. The document outlines the design procedure for constructing interaction diagrams, including considering pure axial load, axial load with uniaxial bending, and axial load with biaxial bending. An example is provided to demonstrate constructing the interaction diagram for a given reinforced concrete column cross-section.
SINGLY REINFORCED BEAM
The document discusses different methods of designing concrete structures, focusing on the limit state method. It describes the limit state method's goal of achieving an acceptable probability that a structure will not become unsuitable for its intended use during its lifetime. The document then discusses stress-strain curves for concrete and steel. It covers stress block parameters and equations for calculating the depth of the neutral axis and moment of resistance for singly reinforced concrete beams. The document concludes by providing examples of analyzing an existing beam section and designing a new beam section.
Rcc Beams
This document provides information on analysis and design of reinforced concrete beams. It discusses key concepts such as modular ratio, neutral axis, stress diagrams, and types of reinforcement. It also defines under-reinforced, balanced, and over-reinforced beam sections. Several examples are provided to illustrate determination of neutral axis depth, moment of resistance, steel percentage, and stresses in concrete and steel reinforcement. Design aspects like maximum load capacity are also explained through examples.
Lec.4 working stress 2
This document discusses the working stress design method for analyzing and designing reinforced concrete beams. It provides equations for determining internal forces, tensile steel ratio, neutral axis depth, and flexural stresses. It also covers topics such as balanced steel ratio, under/over reinforced sections, minimum concrete cover/bar spacing, and designing rectangular and cantilever beams. Doubly reinforced beams are discussed for cases where the cross section dimensions are restricted and the external moment exceeds the section's moment capacity.
DMM I Unit III Bolted Joints 25-05-2021.pptx
The resultant axial load on a bolt depends on the initial tension from tightening, external load, and relative elasticity of bolt and connected members. When members are more yielding than the bolt, load is initial tension plus external load. If bolt is more yielding, load is the greater of initial tension or external load.
To design cylinder covers secured by bolts or studs: determine number and size of bolts/studs to resist upward force from pressure using permissible tensile stress; pitch must be 20-30 times bolt hole diameter; thickness of cover and flange are sized using bending stress equations accounting for eccentric load locations.
For a steam engine cylinder, 12 studs of 24mm diameter were required to
Design of R.C.C Beam
information on types of beams, different methods to calculate beam stress, design for shear, analysis for SRB flexure, design for flexure, Design procedure for doubly reinforced beam,
Singly Reinforce Concrete
this slide will clear all the topics and problem related to singly reinforced beam by limit state method, things are explained with diagrams , easy to understand .
Lecture-6 (Flexural Formula).pptx
This document discusses flexural stresses and bending formulas. It defines bending stresses as stresses that occur in a beam under a constant bending moment with zero shear force. It describes the neutral axis and how fibers above and below experience compression and tension. Formulas are derived relating bending stress to radius of curvature and section modulus. Section modulus is defined as the ratio of moment of inertia to the distance of the outermost fiber. Examples are given of calculating section modulus for common shapes and solving bending stress problems for beams.
RCC BMD
check it out: http://goo.gl/vqNk7m
CADmantra Technologies pvt. Ltd. is a CAD Training institute specilized in producing quality and high standard education and training. We are providing a perfact institute for the students intersted in CAD courses CADmantra is established by a group of engineers to devlop good training system in the field of CAD/CAM/CAE, these courses are widely accepted worldwide.
#catiatraining
#ANSYS #CRE-O
#hypermesh
#Automobileworkshops
#enginedevelopment
#autocad
#sketching
Ch 3-a.pdf
1) The document discusses the flexural analysis and design of reinforced concrete beams. It covers typical beam behavior, stress calculations, flexural equations, and examples of determining nominal moment capacity.
2) Key aspects reviewed include the assumptions in flexural analysis, cracking moment calculations, strain distributions, balanced sections, and code limits on minimum and maximum steel ratios.
3) Practical considerations for concrete dimensions and reinforcement spacing are also addressed. Examples show how to calculate nominal moment strength and design flexural strength for given beam cross-sections.
Rectangular tank
This document provides the design of a rectangular water tank with a capacity of 2500 cubic meters. It includes:
1) Design of the roof slab as a flat slab with columns spaced 5 meters apart and a thickness of 240mm.
2) Design of columns with a size of 350mm and reinforcement of 6 bars of 16mm diameter.
3) Design of the vertical walls with a thickness of 230mm at the base reducing to 180mm in the middle. Reinforcement of 16mm diameter bars at 125mm centers is provided.
4) Checks for crack width for the columns and walls show the crack width is less than the permissible 0.2mm.
Mechanics of solids ii by iffteker anam
1. The document discusses torque diagrams and torsional stress and rotation of different types of structural sections including circular, thin-walled, rectangular, and sections under distributed torsion.
2. Key equations are presented for calculating maximum torsional shear stress and rotation in circular, thin-walled, and rectangular sections based on the section properties and applied torque.
3. Examples are included to demonstrate calculating stress and rotation for different section types under various torque conditions using the provided equations.
Episode 39 : Hopper Design
Episode 39 : Hopper Design
Problem:
1 -experiments with shear box jenike on a particulate catalyst to give the family
yield locus as in 1. given that the bulk density is 1000 kg/m3 particulates and wall friction angle is 15
a-from design chart silo cone, do design a mass flow hopper for the material.
b-if the average size is 100 um, calculate the discharge flow rate passing through the discharge opening
2 - For the above materials using stainless steel is required to store 1000 tons of particulate in it. Coefficient of friction at the wall is given as 0.45 for each value and the formula that you use the appropriate justify the design.
a - draw the dimensions of the silo you and draw a vertical stress profile and the wall of the silo whole time say powerful particle
b- specify the maximum vertical stress and the wall of the silo you
c - if you use several different approaches in the design you provide appropriate recommendations to your employer for work before the end of the casting device fabrication started.
d - if problems such as the formation of the entrance are available after a certain time interval suggest measures - flow improvement measures to be taken to your employer
SAJJAD KHUDHUR ABBAS
Ceo , Founder & Head of SHacademy
Chemical Engineering , Al-Muthanna University, Iraq
Oil & Gas Safety and Health Professional – OSHACADEMY
Trainer of Trainers (TOT) - Canadian Center of Human
Development
1. simple stress_strain
The document outlines the syllabus for the Mechanics of Solids course. It is divided into two parts:
Part A covers topics like simple stresses and strains, principle stresses and strains, and torsion. Part B covers bending moment and shear force, moment of inertia, stresses in beams, shear stresses in beams, and mechanical properties of materials.
The course aims to predict how the geometric and physical properties of structures influence their behavior under applied loads. It examines stresses, strains, deformation, and failure of materials under tension, compression, bending, torsion, and combined loading conditions.
stress_strain SS ramamrutham.ppt
The document outlines the syllabus for the Mechanics of Solids course. It is divided into two parts:
Part A covers topics like simple stresses and strains, principle stresses and strains, and torsion. Part B covers bending moment and shear force, moment of inertia, stresses in beams, shear stresses in beams, and mechanical properties of materials.
The course aims to predict how the geometric and physical properties of structures influence their behavior under applied loads. It examines stresses, strains, deformation, and failure of materials under tension, compression, bending, torsion, and combined loading conditions.
Singly R.C beam
This ppt is more useful for Civil Engineering students.
I have prepared this ppt during my college days as a part of semester evaluation . Hope this will help to current civil students for their ppt presentations and in many more activities as a part of their semester assessments.
I have prepared this ppt as per the syllabus concerned in the particular topic of the subject, so one can directly use it just by editing their names.
Modifed Flextural stresses .pptx
This document discusses bending stresses in simple beams. It begins by outlining the assumptions of simple bending theory, including that beam material is homogeneous, isotropic, and within the elastic limit. It then derives the bending stress formula, showing that stress is proportional to the distance from the neutral axis. The neutral axis is where fiber strains are zero during bending. Several examples are provided to demonstrate calculating bending stresses and properties like modulus of elasticity based on the stress formula.
Integrated presentation pdf
As always I am pleased to post you an interesting presentation on Integrated Civil Engineering Design Coure. If you found it helpy you may make use of it. Please leave your feedbacks.
mos unit -3.pptx
1. The document discusses flexural and shear stresses in beams. It covers the theory of simple bending, assumptions made, derivation of the bending equation, neutral axis, and determination of bending stresses.
2. Formulas are derived for shear stress distribution in beams with different cross sections like rectangular, circular, triangular, I-sections, and T-sections.
3. Examples are provided to calculate stresses induced in beams under different loading conditions using the bending stress formula and section modulus concept. The maximum stress is calculated for beams with various cross-sections subjected to point loads, uniformly distributed loads, and combinations of loads.
Steel strucure lec # (4)
This document discusses tension members and how to calculate their net cross-sectional area. Tension members experience axial tensile forces that cause elongation. Built-up members may be needed if a single shape lacks sufficient capacity, rigidity, or requires unusual connection details. Net area calculation accounts for holes from fasteners by subtracting their total area from the gross area. Inclined portions of the failure plane add area. Shear lag reduces the effective net area based on connection efficiency. Pitch, gage, and stagger refer to fastener spacing.
Impact of Fonts: in Web and Apps Design
Fonts play a crucial role in both User Interface (UI) and User Experience (UX) design. They affect readability, accessibility, aesthetics, and overall user perception.
Practical eLearning Makeovers for Everyone
Welcome to Practical eLearning Makeovers for Everyone. In this presentation, we’ll take a look at a bunch of easy-to-use visual design tips and tricks. And we’ll do this by using them to spruce up some eLearning screens that are in dire need of a new look.
More Related Content
Similar to 9C402.16.ppt
Column Interaction Diagram construction
The document provides information on constructing interaction diagrams for reinforced concrete columns. It defines an interaction diagram as a graph showing the relationship between axial load (Pu) and bending moment (Mu) for different failure modes of a column section. The document outlines the design procedure for constructing interaction diagrams, including considering pure axial load, axial load with uniaxial bending, and axial load with biaxial bending. An example is provided to demonstrate constructing the interaction diagram for a given reinforced concrete column cross-section.
SINGLY REINFORCED BEAM
The document discusses different methods of designing concrete structures, focusing on the limit state method. It describes the limit state method's goal of achieving an acceptable probability that a structure will not become unsuitable for its intended use during its lifetime. The document then discusses stress-strain curves for concrete and steel. It covers stress block parameters and equations for calculating the depth of the neutral axis and moment of resistance for singly reinforced concrete beams. The document concludes by providing examples of analyzing an existing beam section and designing a new beam section.
Rcc Beams
This document provides information on analysis and design of reinforced concrete beams. It discusses key concepts such as modular ratio, neutral axis, stress diagrams, and types of reinforcement. It also defines under-reinforced, balanced, and over-reinforced beam sections. Several examples are provided to illustrate determination of neutral axis depth, moment of resistance, steel percentage, and stresses in concrete and steel reinforcement. Design aspects like maximum load capacity are also explained through examples.
Lec.4 working stress 2
This document discusses the working stress design method for analyzing and designing reinforced concrete beams. It provides equations for determining internal forces, tensile steel ratio, neutral axis depth, and flexural stresses. It also covers topics such as balanced steel ratio, under/over reinforced sections, minimum concrete cover/bar spacing, and designing rectangular and cantilever beams. Doubly reinforced beams are discussed for cases where the cross section dimensions are restricted and the external moment exceeds the section's moment capacity.
DMM I Unit III Bolted Joints 25-05-2021.pptx
The resultant axial load on a bolt depends on the initial tension from tightening, external load, and relative elasticity of bolt and connected members. When members are more yielding than the bolt, load is initial tension plus external load. If bolt is more yielding, load is the greater of initial tension or external load.
To design cylinder covers secured by bolts or studs: determine number and size of bolts/studs to resist upward force from pressure using permissible tensile stress; pitch must be 20-30 times bolt hole diameter; thickness of cover and flange are sized using bending stress equations accounting for eccentric load locations.
For a steam engine cylinder, 12 studs of 24mm diameter were required to
Design of R.C.C Beam
information on types of beams, different methods to calculate beam stress, design for shear, analysis for SRB flexure, design for flexure, Design procedure for doubly reinforced beam,
Singly Reinforce Concrete
this slide will clear all the topics and problem related to singly reinforced beam by limit state method, things are explained with diagrams , easy to understand .
Lecture-6 (Flexural Formula).pptx
This document discusses flexural stresses and bending formulas. It defines bending stresses as stresses that occur in a beam under a constant bending moment with zero shear force. It describes the neutral axis and how fibers above and below experience compression and tension. Formulas are derived relating bending stress to radius of curvature and section modulus. Section modulus is defined as the ratio of moment of inertia to the distance of the outermost fiber. Examples are given of calculating section modulus for common shapes and solving bending stress problems for beams.
RCC BMD
check it out: http://goo.gl/vqNk7m
CADmantra Technologies pvt. Ltd. is a CAD Training institute specilized in producing quality and high standard education and training. We are providing a perfact institute for the students intersted in CAD courses CADmantra is established by a group of engineers to devlop good training system in the field of CAD/CAM/CAE, these courses are widely accepted worldwide.
#catiatraining
#ANSYS #CRE-O
#hypermesh
#Automobileworkshops
#enginedevelopment
#autocad
#sketching
Ch 3-a.pdf
1) The document discusses the flexural analysis and design of reinforced concrete beams. It covers typical beam behavior, stress calculations, flexural equations, and examples of determining nominal moment capacity.
2) Key aspects reviewed include the assumptions in flexural analysis, cracking moment calculations, strain distributions, balanced sections, and code limits on minimum and maximum steel ratios.
3) Practical considerations for concrete dimensions and reinforcement spacing are also addressed. Examples show how to calculate nominal moment strength and design flexural strength for given beam cross-sections.
Rectangular tank
This document provides the design of a rectangular water tank with a capacity of 2500 cubic meters. It includes:
1) Design of the roof slab as a flat slab with columns spaced 5 meters apart and a thickness of 240mm.
2) Design of columns with a size of 350mm and reinforcement of 6 bars of 16mm diameter.
3) Design of the vertical walls with a thickness of 230mm at the base reducing to 180mm in the middle. Reinforcement of 16mm diameter bars at 125mm centers is provided.
4) Checks for crack width for the columns and walls show the crack width is less than the permissible 0.2mm.
Mechanics of solids ii by iffteker anam
1. The document discusses torque diagrams and torsional stress and rotation of different types of structural sections including circular, thin-walled, rectangular, and sections under distributed torsion.
2. Key equations are presented for calculating maximum torsional shear stress and rotation in circular, thin-walled, and rectangular sections based on the section properties and applied torque.
3. Examples are included to demonstrate calculating stress and rotation for different section types under various torque conditions using the provided equations.
Episode 39 : Hopper Design
Episode 39 : Hopper Design
Problem:
1 -experiments with shear box jenike on a particulate catalyst to give the family
yield locus as in 1. given that the bulk density is 1000 kg/m3 particulates and wall friction angle is 15
a-from design chart silo cone, do design a mass flow hopper for the material.
b-if the average size is 100 um, calculate the discharge flow rate passing through the discharge opening
2 - For the above materials using stainless steel is required to store 1000 tons of particulate in it. Coefficient of friction at the wall is given as 0.45 for each value and the formula that you use the appropriate justify the design.
a - draw the dimensions of the silo you and draw a vertical stress profile and the wall of the silo whole time say powerful particle
b- specify the maximum vertical stress and the wall of the silo you
c - if you use several different approaches in the design you provide appropriate recommendations to your employer for work before the end of the casting device fabrication started.
d - if problems such as the formation of the entrance are available after a certain time interval suggest measures - flow improvement measures to be taken to your employer
SAJJAD KHUDHUR ABBAS
Ceo , Founder & Head of SHacademy
Chemical Engineering , Al-Muthanna University, Iraq
Oil & Gas Safety and Health Professional – OSHACADEMY
Trainer of Trainers (TOT) - Canadian Center of Human
Development
1. simple stress_strain
The document outlines the syllabus for the Mechanics of Solids course. It is divided into two parts:
Part A covers topics like simple stresses and strains, principle stresses and strains, and torsion. Part B covers bending moment and shear force, moment of inertia, stresses in beams, shear stresses in beams, and mechanical properties of materials.
The course aims to predict how the geometric and physical properties of structures influence their behavior under applied loads. It examines stresses, strains, deformation, and failure of materials under tension, compression, bending, torsion, and combined loading conditions.
stress_strain SS ramamrutham.ppt
The document outlines the syllabus for the Mechanics of Solids course. It is divided into two parts:
Part A covers topics like simple stresses and strains, principle stresses and strains, and torsion. Part B covers bending moment and shear force, moment of inertia, stresses in beams, shear stresses in beams, and mechanical properties of materials.
The course aims to predict how the geometric and physical properties of structures influence their behavior under applied loads. It examines stresses, strains, deformation, and failure of materials under tension, compression, bending, torsion, and combined loading conditions.
Singly R.C beam
This ppt is more useful for Civil Engineering students.
I have prepared this ppt during my college days as a part of semester evaluation . Hope this will help to current civil students for their ppt presentations and in many more activities as a part of their semester assessments.
I have prepared this ppt as per the syllabus concerned in the particular topic of the subject, so one can directly use it just by editing their names.
Modifed Flextural stresses .pptx
This document discusses bending stresses in simple beams. It begins by outlining the assumptions of simple bending theory, including that beam material is homogeneous, isotropic, and within the elastic limit. It then derives the bending stress formula, showing that stress is proportional to the distance from the neutral axis. The neutral axis is where fiber strains are zero during bending. Several examples are provided to demonstrate calculating bending stresses and properties like modulus of elasticity based on the stress formula.
Integrated presentation pdf
As always I am pleased to post you an interesting presentation on Integrated Civil Engineering Design Coure. If you found it helpy you may make use of it. Please leave your feedbacks.
mos unit -3.pptx
1. The document discusses flexural and shear stresses in beams. It covers the theory of simple bending, assumptions made, derivation of the bending equation, neutral axis, and determination of bending stresses.
2. Formulas are derived for shear stress distribution in beams with different cross sections like rectangular, circular, triangular, I-sections, and T-sections.
3. Examples are provided to calculate stresses induced in beams under different loading conditions using the bending stress formula and section modulus concept. The maximum stress is calculated for beams with various cross-sections subjected to point loads, uniformly distributed loads, and combinations of loads.
Steel strucure lec # (4)
This document discusses tension members and how to calculate their net cross-sectional area. Tension members experience axial tensile forces that cause elongation. Built-up members may be needed if a single shape lacks sufficient capacity, rigidity, or requires unusual connection details. Net area calculation accounts for holes from fasteners by subtracting their total area from the gross area. Inclined portions of the failure plane add area. Shear lag reduces the effective net area based on connection efficiency. Pitch, gage, and stagger refer to fastener spacing.
Similar to 9C402.16.ppt (20)
Recently uploaded
Impact of Fonts: in Web and Apps Design
Fonts play a crucial role in both User Interface (UI) and User Experience (UX) design. They affect readability, accessibility, aesthetics, and overall user perception.
Practical eLearning Makeovers for Everyone
Welcome to Practical eLearning Makeovers for Everyone. In this presentation, we’ll take a look at a bunch of easy-to-use visual design tips and tricks. And we’ll do this by using them to spruce up some eLearning screens that are in dire need of a new look.
Discovering the Best Indian Architects A Spotlight on Design Forum Internatio...
Discovering the Best Indian Architects A Spotlight on Design Forum Internatio...Designforuminternational
India’s architectural landscape is a vibrant tapestry that weaves together the country's rich cultural heritage and its modern aspirations. From majestic historical structures to cutting-edge contemporary designs, the work of Indian architects is celebrated worldwide. Among the many firms shaping this dynamic field, Design Forum International stands out as a leader in innovative and sustainable architecture. This blog explores some of the best Indian architects, highlighting their contributions and showcasing the most famous architects in India.ARENA - Young adults in the workplace (Knight Moves).pdf
Presentations of Bavo Raeymaekers (Project lead youth unemployment at the City of Antwerp), Suzan Martens (Service designer at Knight Moves) and Adriaan De Keersmaeker (Community manager at Talk to C)
during the 'Arena • Young adults in the workplace' conference hosted by Knight Moves.
AHMED TALAAT ARCHITECTURE PORTFOLIO .pdf
Architectural and constructions management experience since 2003 including 18 years located in UAE.
Coordinate and oversee all technical activities relating to architectural and construction projects,
including directing the design team, reviewing drafts and computer models, and approving design
changes.
Organize and typically develop, and review building plans, ensuring that a project meets all safety and
environmental standards.
Prepare feasibility studies, construction contracts, and tender documents with specifications and
tender analyses.
Consulting with clients, work on formulating equipment and labor cost estimates, ensuring a project
meets environmental, safety, structural, zoning, and aesthetic standards.
Monitoring the progress of a project to assess whether or not it is in compliance with building plans
and project deadlines.
Attention to detail, exceptional time management, and strong problem-solving and communication
skills are required for this role.
一比一原版阿肯色大学毕业证(UCSF毕业证书)如何办理
学校原件一模一样【微信：6496090】【阿肯色大学毕业证(UCSF毕业证书)成绩单学位证】【微信：6496090】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：6496090】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：6496090】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：6496090】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理阿肯色大学毕业证(UCSF毕业证书)【微信：6496090 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理阿肯色大学毕业证(UCSF毕业证书)【微信：6496090 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理阿肯色大学毕业证(UCSF毕业证书)【微信：6496090 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理阿肯色大学毕业证(UCSF毕业证书)【微信：6496090 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
一比一原版南安普顿索伦特大学毕业证Southampton成绩单一模一样
原件一模一样【微信：6496090】【南安普顿索伦特大学毕业证Southampton学位证成绩单】【微信：6496090】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：6496090】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：6496090】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：6496090】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理南安普顿索伦特大学毕业证Southampton学位证【微信：6496090 】外观非常精致，由特殊纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理南安普顿索伦特大学毕业证Southampton学位证【微信：6496090 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理南安普顿索伦特大学毕业证Southampton学位证【微信：6496090 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理南安普顿索伦特大学毕业证Southampton学位证【微信：6496090 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
一比一原版肯特大学毕业证UKC成绩单一模一样
原件一模一样【微信：6496090】【肯特大学毕业证UKC学位证成绩单】【微信：6496090】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：6496090】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：6496090】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：6496090】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理肯特大学毕业证UKC学位证【微信：6496090 】外观非常精致，由特殊纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理肯特大学毕业证UKC学位证【微信：6496090 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理肯特大学毕业证UKC学位证【微信：6496090 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理肯特大学毕业证UKC学位证【微信：6496090 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
Heuristics Evaluation - How to Guide.pdf
This guide helps identify potential issues related to navigation, clarity, consistency, and other factors that can affect user experience.
Timeless Principles of Good Design
Timeless Principles of Good Design from my 2015 Presentation at TYPO SF
EASY TUTORIAL OF HOW TO USE CAPCUT BY: FEBLESS HERNANE
CapCut is an easy-to-use video editing app perfect for beginners. To start, download and open CapCut on your phone. Tap "New Project" and select the videos or photos you want to edit. You can trim clips by dragging the edges, add text by tapping "Text," and include music by selecting "Audio." Enhance your video with filters and effects from the "Effects" menu. When you're happy with your video, tap the export button to save and share it. CapCut makes video editing simple and fun for everyone!
哪里办理美国中央华盛顿大学毕业证双学位证书原版一模一样
原版一模一样【微信：741003700 】【美国中央华盛顿大学毕业证双学位证书】【微信：741003700 】学位证，留信认证（真实可查，永久存档）offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原海外各大学 Bachelor Diploma degree, Master Degree Diploma
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
原版制作(MDIS毕业证书)新加坡管理发展学院毕业证学位证一模一样
学校原件一模一样【微信：741003700 】《(MDIS毕业证书)新加坡管理发展学院毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Graphic Design Tools and Software .pptx
Explore the essential graphic design tools and software that can elevate your creative projects. Discover industry favorites and innovative solutions for stunning design results.
Manual ISH (International Society of Hypertension)
Manual ISH (International Society of Hypertension)
Divertidamente SLIDE.pptxufururururuhrurid8dj
Hsuehebvdhdueuw8wiiwieih3udud8e8wisbdydvw7wbidj38ehehdheuwjhdiwjwieheheueurhryrurhrgryd7eueue
一比一原版马里兰大学毕业证(UMD毕业证书)如何办理
学校原件一模一样【微信：6496090】【马里兰大学毕业证(UMD毕业证书)成绩单学位证】【微信：6496090】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
【业务选择办理准则】
一、工作未确定，回国需先给父母、亲戚朋友看下文凭的情况，办理一份就读学校的毕业证【微信：6496090】文凭即可
二、回国进私企、外企、自己做生意的情况，这些单位是不查询毕业证真伪的，而且国内没有渠道去查询国外文凭的真假，也不需要提供真实教育部认证。鉴于此，办理一份毕业证【微信：6496090】即可
三、进国企，银行，事业单位，考公务员等等，这些单位是必需要提供真实教育部认证的，办理教育部认证所需资料众多且烦琐，所有材料您都必须提供原件，我们凭借丰富的经验，快捷的绿色通道帮您快速整合材料，让您少走弯路。
留信网认证的作用:
1:该专业认证可证明留学生真实身份【微信：6496090】
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
→ 【关于价格问题（保证一手价格）
我们所定的价格是非常合理的，而且我们现在做得单子大多数都是代理和回头客户介绍的所以一般现在有新的单子 我给客户的都是第一手的代理价格，因为我想坦诚对待大家 不想跟大家在价格方面浪费时间
对于老客户或者被老客户介绍过来的朋友，我们都会适当给一些优惠。
选择实体注册公司办理，更放心，更安全！我们的承诺：可来公司面谈，可签订合同，会陪同客户一起到教育部认证窗口递交认证材料，客户在教育部官方认证查询网站查询到认证通过结果后付款，不成功不收费！
办理马里兰大学毕业证(UMD毕业证书)【微信：6496090 】外观非常简单，由纸质材料制成，上面印有校徽、校名、毕业生姓名、专业等信息。
办理马里兰大学毕业证(UMD毕业证书)【微信：6496090 】格式相对统一，各专业都有相应的模板。通常包括以下部分：
校徽：象征着学校的荣誉和传承。
校名:学校英文全称
授予学位：本部分将注明获得的具体学位名称。
毕业生姓名：这是最重要的信息之一，标志着该证书是由特定人员获得的。
颁发日期：这是毕业正式生效的时间，也代表着毕业生学业的结束。
其他信息：根据不同的专业和学位，可能会有一些特定的信息或章节。
办理马里兰大学毕业证(UMD毕业证书)【微信：6496090 】价值很高，需要妥善保管。一般来说，应放置在安全、干燥、防潮的地方，避免长时间暴露在阳光下。如需使用，最好使用复印件而不是原件，以免丢失。
综上所述，办理马里兰大学毕业证(UMD毕业证书)【微信：6496090 】是证明身份和学历的高价值文件。外观简单庄重，格式统一，包括重要的个人信息和发布日期。对持有人来说，妥善保管是非常重要的。
Recently uploaded (20)
Discovering the Best Indian Architects A Spotlight on Design Forum Internatio...
Discovering the Best Indian Architects A Spotlight on Design Forum Internatio...
ARENA - Young adults in the workplace (Knight Moves).pdf
ARENA - Young adults in the workplace (Knight Moves).pdf
EASY TUTORIAL OF HOW TO USE CAPCUT BY: FEBLESS HERNANE
EASY TUTORIAL OF HOW TO USE CAPCUT BY: FEBLESS HERNANE
Manual ISH (International Society of Hypertension)
Manual ISH (International Society of Hypertension)
9C402.16.ppt
- 1. 9C402.16 1 Department of Technical Education Andhra Pradesh Name : G.DamodaraRao Designation : Lecturer Branch : Civil Engineering Institute : Govt Polytechnic Srikakulam Year/Semester : IV Semester Subject : Design of RC Structures Subject Code : C 402 Topic : Analysis and Design of Rectangular Beams Duration : 50 Minutes Sub Topic : Stress block parameters, determination of N.A and lever arm Teaching Aids :PPT, Diagrams and Animations Revised by : A. Punyavathi
- 2. 9C402.16 2 Objectives On completion of this period, you would be able to • Stress block parameters • Calculate the of depth of Neutral Axis • Calculate lever arm
- 3. 9C402.16 3 Recap In previous class we have learnt about • Introduction to R.C.C • Concepts of working stress design and limit state method of design
- 4. 9C402.16 4 What is a beam? • A Transversely loaded horizontal structural member
- 5. 9C402.16 5 What are the different types of beams? • Cantilevers • Simply supported • Over Hanging • Fixed • Continuous
- 6. 9C402.16 6 What are the internal actions developed in a beam? Internal actions Bending stresses Shear stresses Bending Compressive stresses Bending tensile stresses
- 7. 9C402.16 7 Why Reinforcement is provided in beams? • To counteract the tensile weakness of concrete in tension zone
- 8. 9C402.16 8 Where do we provide Reinforcement ? • In tension zone
- 9. 9C402.16 9 How do we locate tension zone ? • Neutral axis divides a beam cross section into two zones • A compression zone • A Tension zone • In a simply supported beam tension zone will be below neutral axis • In a cantilever beam tension zone will be above neutral axis
- 10. 9C402.16 10 Singly Reinforced Beam • If steel reinforcement is provided in tension zone only, it is a singly reinforced beam
- 11. 9C402.16 11 Reinforcement in Simply Supported Beam Fig.1
- 12. 9C402.16 12 Reinforcement in Cantilever Beam Fig.2
- 13. 9C402.16 13 Stress Block Parameters Fig.6
- 14. 9C402.16 14 • Breadth of beam = b Effective depth • Effective depth is the distance between the centroid of tension reinforcement and extreme compression fiber • Effective depth (d)=overall depth - effective cover • Effective cover=(clear cover+Ø/2) • D=Overall depth • Ø=Diameter of bar
- 15. 9C402.16 15 Depth of parabolic part of stress block Depth of rectangular part 0.002 0.0035 4 7 u u x x 4 7 3 7 u u u x x x
- 16. 9C402.16 16 Area of stress block The distance of centroid of stress block from top fiber =0.42 xu 3 2 4 0.446 0.446 7 3 7 0.36 u ck u ck ck u x f x f f x
- 17. 9C402.16 17 To find Neutral axis • Equate force of compression to force of tension of the stress block diagram • Force of compression (C) = Average stress x compression area =0.36fckbxu • Force of Tension (T) = Design yield stress x area of steel =0.87 f y A st
- 18. 9C402.16 18 For equilibrium condition • C = T 0.36fckbxu = 0.87 f y A st x u = 0.87 f y A st / 0 .36fckb
- 19. 9C402.16 19 Maximum Depth of Neutral Axis • Compression failure is brittle failure and is sudden and is to be avoided • Maximum depth of Neutral axis is limited to ensure that tensile steel will reach its maximum strain before concrete
- 20. 9C402.16 20 Strain Diagram 0.87fy/Es +0.002 0.0035 N A Xu max Fig.1
- 21. 9C402.16 21 • From the similar triangles of strain diagram Xu max / (d - xu max) =.0035/(0.87fy / Es)+0.002 Solving the above we can solve for Xu max (Xu max / d) = 0.0035 / [ (0.87 fy / Es)+0.0055 ] • The value of Xu max depends on grade of steel only Substituting the values of fy & Es the values of Xu max can be obtained
- 22. 9C402.16 22 • The values of Xu max for three grades of steel fy N/mm2 Xu max 250 0.53d 415 0.48d 500 0.46d Table 1
- 23. 9C402.16 23 Lever arm (z) • The distance between the lines of action of compression and tension forces Z = d – 0.42 xu
- 24. 9C402.16 24 • The resultant compressive force acts at the centroid of the compression zone of stress block • At a distance of 0.42xu from top of extreme compression fiber
- 25. 9C402.16 25 • As the tensile resistance of concrete is ignored • The resultant Tensile force acts at the centroid of the steel reinforcement • i.e. at distance ‘d’ from top of extreme compression fiber
- 27. 9C402.16 27 Lever arm (z) = d - 0.42xu Fig.3
- 28. 9C402.16 28 Summary In this class we have • Stress block parameter • Depth of neutral axis of singly reinforced beams • Lever arm
- 29. 9C402.16 29 Quiz 1. A Singly reinforced beam is one in which steel will be provided in A) Only Tension zone B) Only compression zone C) Both D) None
- 30. 9C402.16 30 Frequently Asked Questions 1. Draw the stress block diagram for rectangular section 2. Define lever arm N.A