A Stress Ribbon Bridge is a tension structure (similar in many ways to a simple suspension bridge). The suspension cables are embedded in the deck which follows a catenary arc between supports.
THIS IS THE PRESENTATION ON REPAIR AND RESTORATION OF CONCRETE STRUCTURE. DURING EARTHQUAKE, STRUCTURES GOES TO COLLAPSE OR GET CRACK. DUE TO THIS MINOR CRACK THE STRUCTURE WILL COLLAPSE AFTER EARTHQUAKE DONE. TO RESOLVE REPAIR AND RESTORATION WORK ADOPTED TO MAKE STRUCTURE STRENGTHENING.
A Stress Ribbon Bridge is a tension structure (similar in many ways to a simple suspension bridge). The suspension cables are embedded in the deck which follows a catenary arc between supports.
THIS IS THE PRESENTATION ON REPAIR AND RESTORATION OF CONCRETE STRUCTURE. DURING EARTHQUAKE, STRUCTURES GOES TO COLLAPSE OR GET CRACK. DUE TO THIS MINOR CRACK THE STRUCTURE WILL COLLAPSE AFTER EARTHQUAKE DONE. TO RESOLVE REPAIR AND RESTORATION WORK ADOPTED TO MAKE STRUCTURE STRENGTHENING.
CONTENTS
• Introduction and brief list of Failures and Solution in Pile Foundation.
• Major issues and their solutions during Pile Foundation construction:
o Pile foundation problems and its solutions.
o Settlement of adjacent structures or adjacent grounds and its
solutions.
o Faults in concrete and its solutions.
o Working load faults and its solutions.
• Underpinning
Contents:
1.history
2.what is precast concrete and why it is called so?
3.properties
4.features
5.precast concrete structural elements
6.types
7.advantages
8.disadvantages
Prestressed concrete structures and its applications By Mukesh Singh GhuraiyaMukesh Singh Ghuraiya
1. What is Prestressed??
2. Principle of Prestressed
3. Method of prestressing
4. Prestressed concrete structures
5. Advantages/application of Prestressed concrete
6. Disadvantages of Prestressed concrete
7. Comparison of RCC and Prestressed Concrete Flat Slabs
CONTENTS
• Introduction and brief list of Failures and Solution in Pile Foundation.
• Major issues and their solutions during Pile Foundation construction:
o Pile foundation problems and its solutions.
o Settlement of adjacent structures or adjacent grounds and its
solutions.
o Faults in concrete and its solutions.
o Working load faults and its solutions.
• Underpinning
Contents:
1.history
2.what is precast concrete and why it is called so?
3.properties
4.features
5.precast concrete structural elements
6.types
7.advantages
8.disadvantages
Prestressed concrete structures and its applications By Mukesh Singh GhuraiyaMukesh Singh Ghuraiya
1. What is Prestressed??
2. Principle of Prestressed
3. Method of prestressing
4. Prestressed concrete structures
5. Advantages/application of Prestressed concrete
6. Disadvantages of Prestressed concrete
7. Comparison of RCC and Prestressed Concrete Flat Slabs
A geotextile is defined as any permeable textile material that is used with foundation, soil, rock, earth, etc to increase stability and decrease wind and water erosion.
Shear, bond bearing,camber & deflection in prestressed concreteMAHFUZUR RAHMAN
This Presentation was presented as a partial fulfillment of Prestressed Concrete Design Lab Course. Behavior & Design of Prestress on above topic is shortly discussed on the presentation. The part "Shear & Shear Design in Prestressed" Concrete was prepared by me. Other topics were prepared by other members of my group. Thanks to all my teachers & friends who helped us in different stages during preparation of the total presentation.
PNGE 310
Class 2
1
Overbalanced Drilling
• Most common type of Oil & Gas drilling
• Drilling with Fluid filled hole
• Hydrostatic pressure > formation pressure
• 𝑃ℎ = 0.052 ∗ 𝑀𝑊 ∗ 𝑇𝑉𝐷 ,
• 𝑤ℎ𝑒𝑟𝑒 𝑃ℎ 𝑖𝑠 𝑡ℎ𝑒 ℎ𝑦𝑑𝑟𝑜𝑠𝑡𝑎𝑡𝑖𝑐 𝑝𝑟𝑒𝑠𝑠𝑢𝑟𝑒 𝑖𝑛 𝑝𝑠𝑖,
• 𝑀𝑊 𝑖𝑠 𝑡ℎ𝑒 𝑓𝑙𝑢𝑖𝑑 𝑑𝑒𝑛𝑠𝑖𝑡𝑦 𝑖𝑛 𝑝𝑝𝑔 (
𝑙𝑏
𝑔𝑎𝑙
),𝑎𝑛𝑑
• 𝑇𝑉𝐷 𝑖𝑠 𝑡ℎ𝑒 𝑡𝑟𝑢𝑒 𝑣𝑒𝑟𝑡𝑖𝑐𝑎𝑙 𝑑𝑒𝑝𝑡ℎ 𝑖𝑛 𝑓𝑡
• Freshwater: 8.33 ppg
• Brine: ~8.5- 9.0 ppg
• Muds: ~8.5- 20 ppg
• Water Based Mud
• Diesel Based Mud
• Synthetic Oil Based Mud
2
Overbalanced Drilling:
Rig Components
3
1. Crown Block
2. Cat Line (Hoist)
3. Drill Line
4. Monkey Board
5. Traveling Block (Hook)
6. Top Drive
7. Derrick (Mast)
8. Drill Pipe, Elevators, Bails
9. Doghouse, Drillers Cabin (DS, ODS)
10. BOP (Stack)
11. Rig Water
12. Cable Tray (Festoon)
13. Generators (Gens)
14. Rig Fuel
15. Electric House (VFD)
16. Mud Pumps
17. Bulk Mud Storage
18. Mud Pits
19. Earth Pit (Solids Control)
20. Separator (Gas Buster)
21. Shakers
22. Choke Manifold
23. V-Door
24. Pipe Racks
25. Accumulator
Crown Block
• An assembly of sheaves or pulleys mounted on beams at the
top of the derrick. The drilling line is run over the sheaves
down to the hoisting drum.
4
Traveling Block
• An arrangement of pulleys or sheaves through which drilling
cable is reeved, which moves up or down in the derrick or
mast.
5
Top Drive
• The top drive rotates the drill string without the use of a kelly
and rotary table. The top drive is operated from a control
console on the rig floor or from joysticks in the drillers house.
6
Bails
• Large steel tubular used to connect the elevators to the top
drive. Used when picking up pipe, tripping drill pipe, or
running casing.
7
Elevators
• A set of clamps that grips a stand, or column, of casing, tubing,
drill pipe, or sucker rods, so the stand can be raised or lowered
into the hole.
8
Drawworks
• The hoisting mechanism on a drilling rig. It is essentially a
large winch that spools off or takes in the drilling line which
raises or lowers the traveling blocks
9
Catwalk
• Equipment where pipe is laid to be lifted to the rig floor by the
catline or by an air hoist. Can be automated by hydraulics.
• https://www.youtube.com/watch?v=Nzn2m_wqzlM
10
https://www.youtube.com/watch?v=Nzn2m_wqzlM
Drill String Design
• Drill String Components:
• Bit
• Drill Collars
• Tapered/ Non-Tapered
• Drill Pipe
• Tapered/ Non-Tapered
11
Buoyancy
• Buoyancy Factor is the factor that is used to compensate loss
of weight due to immersion in drilling fluid, 0-1.0
• 65.44ppg is the weight of steel
12
𝐵𝐹 = 1 −
𝜌𝑓𝑙𝑢𝑖𝑑
𝜌𝑝𝑖𝑝𝑒
𝑜𝑟
65.44 − 𝑀𝑊[𝑝𝑝𝑔]
65.44
Drill String Design Checklist
1. Air Weight Calculations
2. Tapered/Non-Tapered DC Calculations
3. Stiffness Ratio
4. Bending Strength Ratio
5. DC Make-Up Torque
6. Drill Pipe Information & Design
7. Margin of Pull (MOP) also called Ov
Great tool provides insight into key considerations when determining whether sliplining or rehabilitating an existing culvert, bridge or storm sewer would be ideal.
Design and Preparation of Aluminium Nozzle Using Metal Spinning ProcessNitesh Sharma
This new technique comprises of single-piece production of nozzle i.e. convergent, and divergent parts without the involvement of welding these parts separately to bolster the strength of the nozzle and increasing the efficacy of the nozzle.
Design of rigid pavements. IRC method of design of rigid pavement. Transportation Engineering. Civil Engineering. Wheel loads on rigid pavement. Action of various stresses on rigid pavement. Highway engineering. How rigid pavements different from flexible pavements
Harnessing WebAssembly for Real-time Stateless Streaming PipelinesChristina Lin
Traditionally, dealing with real-time data pipelines has involved significant overhead, even for straightforward tasks like data transformation or masking. However, in this talk, we’ll venture into the dynamic realm of WebAssembly (WASM) and discover how it can revolutionize the creation of stateless streaming pipelines within a Kafka (Redpanda) broker. These pipelines are adept at managing low-latency, high-data-volume scenarios.
Water billing management system project report.pdfKamal Acharya
Our project entitled “Water Billing Management System” aims is to generate Water bill with all the charges and penalty. Manual system that is employed is extremely laborious and quite inadequate. It only makes the process more difficult and hard.
The aim of our project is to develop a system that is meant to partially computerize the work performed in the Water Board like generating monthly Water bill, record of consuming unit of water, store record of the customer and previous unpaid record.
We used HTML/PHP as front end and MYSQL as back end for developing our project. HTML is primarily a visual design environment. We can create a android application by designing the form and that make up the user interface. Adding android application code to the form and the objects such as buttons and text boxes on them and adding any required support code in additional modular.
MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software. It is a stable ,reliable and the powerful solution with the advanced features and advantages which are as follows: Data Security.MySQL is free open source database that facilitates the effective management of the databases by connecting them to the software.
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.
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.
Forklift Classes Overview by Intella PartsIntella Parts
Discover the different forklift classes and their specific applications. Learn how to choose the right forklift for your needs to ensure safety, efficiency, and compliance in your operations.
For more technical information, visit our website https://intellaparts.com
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
accuracy improvements over previous techniques. The results indicate that the combination of the volumetric
input and curriculum learning holds significant promise for mitigating adversarial attacks without necessitating
adversary training.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
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.
4. ADVANTAGE OF PRESTRESSING
The prestressing of concrete has several advantages as compared to traditional
reinforced concrete (RC) without prestressing. A fully prestressed concrete member is
usually subjected to compression during service life. The advantages of prestress
concrete are as follows:
Section remains uncracked under service loads.
Reduction of steel corrosion and thereby increase in durability.
Full section is utilised.
● Higher moment of inertia.
● Less deformations (improved serviceability).
Increase in shear, bending and torsional capacities.
5. ADVANTAGE OF PRESTRESSING
Improved performance (resilience) under dynamic and fatigue loading.
Sections can behave elastically.
Larger spans possible with prestressing (bridges, buildings).
For the same span, less depth compared to RC member.
● Reduction in self weight.
● More aesthetic appeal due to slender sections.
● More economical sections.
6. ADVANTAGE OF PRESTRESSING
Suitabality for precast construction
● Rapid construction
● Better quality control
● Reduced maintenance
● Suitable for repetitive construction
● Multiple use of formwork
● Availability of standard shapes
7. LIMITATIONS OF PRESTRESSING
● Prestressing needs skilled manpower
● The use of high strength materials is costly
● There is additional cost in auxiliary equipments
● There is need for quality control and inspection
8. TERMINOLOGY
Post-Tensioning
The application of a compressive force to the concrete by stressing tendons or bars
after the concrete has been cast and cured. The force in the stressed tendons or
bars in transferred to the concrete by means of anchorages.
Wires
Prestressing wire is a single unit made of steel.
Strands
An assembly of several high strength steel wires wound together. Stands usually
have six outer wires helically wound around a single straight wire of a similar
diameter.
Tendon
A group of strands or wires are wound to form a prestressing tendon.
9. TERMINOLOGY
Anchorage
An assembly of various hardware components which secure a tendon at its ends
after it has been stressed and imparts the tendon force into the concrete.
Anchor Plate (Tube Unit)
The part of the anchorage which bears directly on the concrete and through which
the tendon force is transmitted.
Wedges
A small conically shaped steel component placed around a strand to grip and
secure it by wedge action in a tapered hole through a wedge plate.
Wedge Plate
A circular steel component of the anchorage containing a number of tapered holes
through which the strands pass and are secured by conical wedges.
18. CONCRETE MIX DESIGN
Concrete class : C50
28 days cube strength : 50 mpa
Materials
Cement : Bashundhara (Ordinary Portland Cement) OPC
Fine Aggregate : Sylhet Sand, Bangladesh
Coarse Aggregate : Meghaloy, India
Admixture : Master Polyheed 8632
Water Cement Ratio : 0.3
Slump : 150mm ~ 200mm
19. CONCRETE MIX DESIGN
Batch Weight per cum of Concrete on SSD Condition
Cement : 470 kg
Water : 141 kg
Fine Aggregate : 658.6 kg
Coarse Aggregate : 1152 kg
Admixture : 5.9 kg
Mix Proportion : Cement : Sand : Stone
1 : 1.40 : 2.45
20. CONCRETING WORK OF PC GIRDER
Girder ready for concreting Concrete Transit Mixer Car Slump Test
27. GIRDER END ARRANGEMENT
FOR PRESTRESSING
Master Grip
Inserting
Master Grip
Inserting
Master Grip
Jack
Setting
28. PRESTRESSING PULL (ELONGATION)
FROM BOTH END
1st Reading : 62 mm Final Reading : 163 mm Reading after lock off : 153 mm
Slip : 163-153= 10 mm
29. PRESTRESSING PULL (ELONGATION)
FROM BOTH END
Work supervised by CSC Engr. Reading just after stressing : 200 mm Reading after 24 hours : 200 mm
After 24 hours slip: 200-200=0
30. STRUCTURE LOAD ON EACH GIRDER AND HOW IT IS
MAINTAINED BY PRESTRESSING
Total load (LL+DL) on each 30m girder = 1643.19 kN
Jacking force on each cable = 2475 kN (As per Contract Drawings)
Jacking force on each girder (3 no cable) = 2475 x 3 = 7425 kN
Hence 7425 kN>1643 kN
Factor of Safety, FS = 7425÷1643 = 4.5 [Minimum FS is required 1.5]
So Girder is safe.
31. PRESTRESSING PULL IS CONVERTED INTO STRESS
Jacking force, F = 2475 kN [As per Contract Drawings]
= 2475÷0.96 [Jack efficiency 96%]
= 2578.125 kN
= 2578.125 x 1000 N [1 kN = 1000 N]
= 2578.125 x 1000÷9.81 kg [1 Kg = 9.81 N]
= 262805.81 kg
Jacking Ram Area, A = 563.72 cm2
Stress = Force/Area = F/A = 262805.81/563.72 kg/cm2
= 466.19 kg/cm2
32. HOGGING & IT’S MEASUREMENT
After Stressing Hogging at centre : 33 mm Measurement taking by level machine
33. BUCKLING & IT’S MEASUREMENT
After Stressing Reading at end section : 100 mm Reading at max buckling point
90 mm
34. GROUT MIX DESIGN
Water cement ratio : 0.45
Mix proportion : Water : Cement : Admixture (Cebex-100)
22.5 Kg : 50 Kg : 1 Pkt