Deep beams are structural elements where a significant portion of the load is carried to the supports by compression forces combining the load and reaction. As a result, the strain distribution is nonlinear and shear deformations are significant compared to pure flexure. Examples include floor slabs under horizontal loads, short span beams carrying heavy loads, and transfer girders. The behavior of deep beams is two-dimensional rather than one-dimensional, and plane sections may not remain plane. Analysis requires a two-dimensional stress approach.
Design and Detailing of RC Deep beams as per IS 456-2000VVIETCIVIL
Visit : https://teacherinneed.wordpress.com/
1. DEEP BEAM DEFINITION - IS 456
2. DEEP BEAM APPLICATION
3. DEEP BEAM TYPES
4. BEHAVIOUR OF DEEP BEAMS
5. LEVER ARM
6. COMPRESSIVE FORCE PATH CONCEPT
7. ARCH AND TIE ACTION
8. DEEP BEAM BEHAVIOUR AT ULTIMATE LIMIT STATE
9. REBAR DETAILING
10. EXAMPLE 1 – SIMPLY SUPPORTED DEEP BEAM
11. EXAMPLE 2 – SIMPLY SUPPORTED DEEP BEAM; M20, FE415
12. EXAMPLE 3: FIXED ENDS AND CONTINUOUS DEEP BEAM
13. EXAMPLE 4 : FIXED ENDS AND CONTINUOUS DEEP 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,
Design and Detailing of RC Deep beams as per IS 456-2000VVIETCIVIL
Visit : https://teacherinneed.wordpress.com/
1. DEEP BEAM DEFINITION - IS 456
2. DEEP BEAM APPLICATION
3. DEEP BEAM TYPES
4. BEHAVIOUR OF DEEP BEAMS
5. LEVER ARM
6. COMPRESSIVE FORCE PATH CONCEPT
7. ARCH AND TIE ACTION
8. DEEP BEAM BEHAVIOUR AT ULTIMATE LIMIT STATE
9. REBAR DETAILING
10. EXAMPLE 1 – SIMPLY SUPPORTED DEEP BEAM
11. EXAMPLE 2 – SIMPLY SUPPORTED DEEP BEAM; M20, FE415
12. EXAMPLE 3: FIXED ENDS AND CONTINUOUS DEEP BEAM
13. EXAMPLE 4 : FIXED ENDS AND CONTINUOUS DEEP 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,
ANALYSIS & DESIGN ASPECTS OF PRE-STRESSED MEMBERS USING F.R.P. TENDONSGirish Singh
The purpose of this investigation is mainly a brief explanation about the advantages of FRP over steel. The various uses and advantages of FRP are explained in this project. In this project, we have taken a section of 3m length, 200mm width and 300mm depth and using a parabolic tendon of eccentricity 100mm at the centre. We have design the section for FRP as well as steel with the above data. The final stresses obtained is being verified with the help of Ansys software. We have shown the result of steel straight tendon only in this mini project.
Design of steel structure as per is 800(2007)ahsanrabbani
It does not offer resistance against rotation and also termed as a hinged or pinned connections.
It transfers only axial or shear forces and it is not designed for moment
It is generally connected by single bolt/rivet and therefore full rotation is allowed
OUTLINE
introduction
classification
loads
materials used
Type of reinforcement
RCC
construction methods in RCC
Analysis and design
Detailing
Basic Rules
Site visit
video
Peer review presentation for the strut and tie method as an analysis and design approach for the mat on piles foundations of the primary separation cell (vessel).
ANALYSIS & DESIGN ASPECTS OF PRE-STRESSED MEMBERS USING F.R.P. TENDONSGirish Singh
The purpose of this investigation is mainly a brief explanation about the advantages of FRP over steel. The various uses and advantages of FRP are explained in this project. In this project, we have taken a section of 3m length, 200mm width and 300mm depth and using a parabolic tendon of eccentricity 100mm at the centre. We have design the section for FRP as well as steel with the above data. The final stresses obtained is being verified with the help of Ansys software. We have shown the result of steel straight tendon only in this mini project.
Design of steel structure as per is 800(2007)ahsanrabbani
It does not offer resistance against rotation and also termed as a hinged or pinned connections.
It transfers only axial or shear forces and it is not designed for moment
It is generally connected by single bolt/rivet and therefore full rotation is allowed
OUTLINE
introduction
classification
loads
materials used
Type of reinforcement
RCC
construction methods in RCC
Analysis and design
Detailing
Basic Rules
Site visit
video
Peer review presentation for the strut and tie method as an analysis and design approach for the mat on piles foundations of the primary separation cell (vessel).
OUTLINE:
Introduction
Shoring Process
Effective Beam Flange Width
Shear Transfer
Strength Of Steel Anchors
Partially Composite Beams
Moment Capacity Of Composite Sections
Deflection
Design Of Composite Sections
Design of Beam- RCC Singly Reinforced BeamSHAZEBALIKHAN1
Concrete beams are an essential part of civil structures. Learn the design basis, calculations for sizing, tension reinforcement, and shear reinforcement for a concrete beam.
Tube structures and its type with comparison .Udayram Patil
Hollow tube section always provide greater strength. So the same concept is applied to the building. Tubed system is designed to act like a three dimensional hollow tube structure which result in increased load resistance .
Definition Where this system can be used
Features of the Grid Slab
Decorative grid slabs in historical structures
Types of Grid Slab
Comparison: Long Span Structures
Construction
Technique
Formwork Required
Reinforcements Details
Modification in Grid Slab for Utility
Services Provided in Grid Slab
Benefits
Iconic Landmarks using Grid Slabs
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
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Deep beam
1.
2. Deep beams are structural elements loaded as simple beams in which a
significant amount of the load is carried to the supports by a compression force
combining the load and the reaction.
As a result, the strain distribution is no longer considered linear, and the shear
deformations become significant when compared to pure flexure.
Floor slabs under horizontal load, short span beams carrying heavy loads, and
transfer girders are examples of deep beams.
3.
4.
5. Two-Dimensional Action:because of the dimension of deep beam
they behave as two-dimensional action rather than one-dimensional
action.
Plane Section Do Not Remain Plane:the assumption of plane
section remain plane cannot be used in the deep beam design.
The strain distribution is not longer linear.
Shear Deformation: the shear deformation cannot be neglected as in
the ordinary beam.
6. The stress distribution is not linear even in the elastic stage.
At the ultimate limit state the shape of concrete compressive stress block is not
parabolic shape.
The Design is based on the ACI Ultimate Strength Design
Method and applies to those flexural members having a clear span to depth ratio of
less than 4.0.
The flexural reinforcement is designed taking into account the reduced lever arm
due to the non-linearity of the strains' distribution.
Deep beams play a very significant role in design of mega and as well as small
structures.
To avoid this problem of construction of some very long span halls etc the concept
of deep beams is very effective and durable.
7.
8.
9.
10. • The elementary theory of bending for simple beams may not be applicable to deep beams even
under the linear elastic assumption.
• A deep beam is in fact a vertical plate subjected to loading in its own plane. The strain or stress
distribution across the depth is no longer a straight line, and the variation is mainly dependent on
the aspect ratio of the beam.
• The analysis of a deep beam should therefore be treated as a two dimensional plane stress
problem, and two-dimensional stress analysis methods should be used in order to obtain a realistic
stress distribution in deep beams even for a linear elastic solution.
12. • span/depth ratio of
simply supported beam is < 2,
continuous beam < 2.5,
it is classified as deep beam.
• Such structures are found in transfer girders and in shear wall
structures that resist lateral forces in buildings. It is also found in some
of the industrial buildings.
13. • The traditional principles of stress analysis are neither suitable nor
adequate to determine the strength of reinforced concrete deep beams.
• In deep beams, the bending stress distribution across any transverse
section deviates appreciably from straight line distribution assumed in the
elementary beam theory.
14. • The behaviour of a deep beam depends also on how they are loaded & special
considerations should be given to this aspect in design.
• Here cracking will occur at one-third to one-half of the ultimate load.
• In the single span beam supporting a concentrated load at mid span, the compressive
stresses act roughly parallel to the lines joining the load and the supports and the tensile
stresses act parallel to the bottom of the beam.
• The flexural stresses at the bottom is constant over much of the span.
• The figure shows the crack pattern and the truss analogy of the same.
15.
16. Each of the three tension AB, CD and EF ties have cracked and at failure shaded
region would crush or the anchorage zones at E and F would fail.
simplified truss model
17. • A single span beam supporting a uniform load acting on the top has the stress
trajectories , crack pattern and simplified truss as shown.
18.
19. • A single span beam supporting a uniform load acting on the
lower face of the beam has the stress trajectories , crack pattern
and simplified truss as shown.
20.
21. • The compression trajectories form an arch with the loads
hanging from it. The crack pattern shows that the load is
transferred upward by reinforcement until it acts on the
compression arch, which then transfers the load down to the
supports.
• The force in the longitudinal tension ties will be constant along
the length of the deep beam. This is the reason that the steel
must be anchored at the joints over the reaction, failure of
which is a major cause of distress
22.
23. Parameters influencing deep beam behavior are:
Width of support = C
Overall depth of beam = D
Effective span = L
Width / Thickness of beam = t
Type of loading, uniform = w
24. The Min. thickness of deep beams should be based on two
considerations:
1. It should be thick enough to prevent buckling with respect to its
span & height i.e.
where t = thickness of beam.
2. The thickness should be such that the concrete itself should be able
to carry a good amount of the shear force that acts in the beam
without the assistance of any steel.
50&25
t
L
t
D
25. • Z = 0.6L or 0.6D
i.e. Z = 0.6L when L/D < 1
& Z = 0.6D when L/D > 1
26. • From those values,
Mu = As.fs.Z where fs = 0.87 fy
• The greater value of As is taken as tension steel.
Lfy
Mu
Lfy
Mu
A
fyD
Mu
Dfy
Mu
Zf
Mu
A
s
s
s
.
9.1
6.087.0
or
9.1
6.087.0.
29. • When designing for shear, it is assumed that concrete itself should
carry at least 65% of the ultimate shear.
• This is ensured by choosing a suitable thk. of beam by the following
formula :
ftavD
Vu
t
)35.0(72.0
65.0
30. • Shear capacities of tension steel & nominal web steel should also be
taken into account in resisting the shear. Their shear capacity is
calculated as :
where,
C2 = 225 N/mm2 for Fe415
As = Area of tension steel provided.
n
D
y
AsCVs
1
2
2 Sin
1
.
31. α = Angle between the bar considered & the critical diagonal crack.
y1= Depth from the top of the beam to the point where bar intersects the
critical diagonal crack line.
n = Number of bars including tension steel cut by the assumed crack line
D = Total depth of beam
32. • Vertical steel Av and Horizontal steel Ah
• Horizontal steel bars acts as shear reinforcement and also overcome the
effects of shrinkage & temperature.
• The amounts specified in IS:456-2000 are :
a) Vertical steel shall be 0.12% for Fe415, the bar diameter shall not be
more than 14mm and spacing not more than 3x thk. of beam or 450mm.
33. b) Horizontal steel shall be 0.20% for Fe415, the bar diameter shall not
be more than 16mm & spacing not more than 3x thk. of beam or
450mm.
c) Necessary side reinforcement should also be provided.
34. Detailing of tension steel:
ü In deep beams, the tension steel is placed in a zone of depth equal to
(0.25D-0.05L) adjacent to the face of beam.
ü No curtailment of the bars. It should be bent upwards at the ends to
obtain adequate anchorage & embedment .
35. 1. Determine whether the given beam is deep or not.
2. Check its thickness.
3. Design for flexure.
4. Design for minimum web steel & its distribution in the beam.
5. Design for shear.
6. Check for bearing pressure at support & point loading for
local failures.
7. Detailing (BRITISH PRACTICE)
36. Thank you
Mr. VIKAS MEHTA
School of Mechanical and civil engineering
Shoolini University
Village Bajhol, Solan (H.P)
vikasmehta@shooliniuniversity.com
+91 9459268898