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Dr Jawed Qureshi
United Kingdom
Приєднався 24 січ 2023
Hey friends I’m Dr Jawed Qureshi, a lecturer at a London University. On this channel we explore life skills to help us lead more productive, happy and examined life.
Have a lovely day!
Have a lovely day!
How Do Headed Shear Studs Really Perform in Profiled Steel Sheeting? The Answer May Surprise You!
Dr Jawed Qureshi presents his conference presentation on, “Behaviour of Headed Shear Stud in a Push Test using Profiled Steel Sheeting”.
In this video, I’ll walk you through the steps to model a push test, replicating the behaviour of a steel-concrete composite beam. A basic finite element model is developed for the push test, accounting for both material and geometric nonlinearities. The model closely aligns with the experimental results. A key feature of this FE model is its ability to simulate the separation between steel sheeting and the concrete slab. The model can be used to conduct a parametric study by varying factors such as concrete strength, stud diameter, mesh reinforcement, and the thickness and width of the sheeting. This paper was presented during the first year of my PhD study.
This video is a part of my conference paper presentation at “ASCCS 2009 9th International Conference on Steel Concrete Composite and Hybrid Structures”, Leeds, United Kingdom 8th - 10th July 2009.
Published conference paper:
Qureshi, J., Lam, D. and Ye, J. (2009) ‘Behaviour of Headed Shear Stud in a Push Test using Profiled Steel Sheeting’, in The 9th International Conference on Steel Concrete Composite and Hybrid Structures. Leeds, UK.
Link to published paper: tinyurl.com/JQ-ASCCS2009
Link to presentation and conference paper:
⏰ TIMECODES ⏰
00:00 - Introduction
00:52 - What is a composite beam?
02:40 - What is a push test?
04:20 - Details of experiment
06:27 - FE model and mesh
07:49 - Boundary conditions and load application
10:47 - Material models
13:47 - Results Load-slip behaviour
15:32 - Deformed shape and stress contour plots
18:29 - Conclusions
Watch Conference presentations series at tinyurl.com/JQConference
1. Recycling of FRPs - NCE Cyprus conference Sep 2022 ua-cam.com/video/1bVLLqBQcLs/v-deo.htmlsi=eIG63VlboTzCBBdy
2. Bolted and Hybrid FRP joints - SEMC 2022 Cape Town South Africa Conference ua-cam.com/video/M_sUvfkKN7s/v-deo.html
3. Steel end plate joints modelling - SEMC 2022 Cape Town South Africa Conference ua-cam.com/video/-SwcX198ITo/v-deo.html
4. Resin inject bolted FRP bridge connections - NetComposites FRP bridges 2012 London, UK ua-cam.com/video/wMWlSTlxv-0/v-deo.html
5. Modelling push test - SEMC 2010 Cape Town South Africa ua-cam.com/video/RCFvRIBNgBQ/v-deo.html
6. FRP beam-to-column Joints CICE 2012, Rome Italy ua-cam.com/video/9H6-PxcaTdk/v-deo.html
7. Behaviour of headed stud in steel metal decking ua-cam.com/video/hYfHIYV60i8/v-deo.html
Subscribe to my UA-cam
www.youtube.com/@DrJQureshi
Follow Me Twitter
DrJQureshi
Follow Me on Instagram
drjqureshi
Follow me on LinkedIn
www.linkedin.com/in/jawed-qureshi-2370191a2/
Your queries:
What is a headed shear stud and how is it used in construction?
How does the profile of steel sheeting affect the behavior of headed shear studs in push tests?
What are the common methods for conducting a push test on headed shear studs?
What factors influence the shear strength of headed shear studs when used with profiled steel sheeting?
How does the geometry of profiled steel sheeting impact the performance of headed shear studs in push tests?
What are the typical failure modes of headed shear studs in push tests?
How can the results of push tests on headed shear studs be used to improve structural design?
What are the standards and guidelines for testing headed shear studs in push tests?
How does the thickness of profiled steel sheeting affect the push test results for headed shear studs?
What are some real-world applications where push tests of headed shear studs with profiled steel sheeting are critical?
#steeldesign #civilengineering #structuralengineering
Disclaimer: This material is provided on an 'as is' basis with no warranty. There is no guarantee that the material will meet your requirements, that the material is error-free, that the results obtained from the use of the material will be reliable, or that any errors in the material will be corrected.
Copyright: Dr Jawed Qureshi holds the copyright to this conference video presentation series. He is a senior academic in London, UK, with over 20 years of international experience. Dr Qureshi holds a PhD in steel-concrete composite structures from the University of Leeds and has prior teaching experience at the University of Warwick. He is currently working at the University of East London, London, United Kingdom, as a Senior Lecturer in Structural Engineering and Design.
In this video, I’ll walk you through the steps to model a push test, replicating the behaviour of a steel-concrete composite beam. A basic finite element model is developed for the push test, accounting for both material and geometric nonlinearities. The model closely aligns with the experimental results. A key feature of this FE model is its ability to simulate the separation between steel sheeting and the concrete slab. The model can be used to conduct a parametric study by varying factors such as concrete strength, stud diameter, mesh reinforcement, and the thickness and width of the sheeting. This paper was presented during the first year of my PhD study.
This video is a part of my conference paper presentation at “ASCCS 2009 9th International Conference on Steel Concrete Composite and Hybrid Structures”, Leeds, United Kingdom 8th - 10th July 2009.
Published conference paper:
Qureshi, J., Lam, D. and Ye, J. (2009) ‘Behaviour of Headed Shear Stud in a Push Test using Profiled Steel Sheeting’, in The 9th International Conference on Steel Concrete Composite and Hybrid Structures. Leeds, UK.
Link to published paper: tinyurl.com/JQ-ASCCS2009
Link to presentation and conference paper:
⏰ TIMECODES ⏰
00:00 - Introduction
00:52 - What is a composite beam?
02:40 - What is a push test?
04:20 - Details of experiment
06:27 - FE model and mesh
07:49 - Boundary conditions and load application
10:47 - Material models
13:47 - Results Load-slip behaviour
15:32 - Deformed shape and stress contour plots
18:29 - Conclusions
Watch Conference presentations series at tinyurl.com/JQConference
1. Recycling of FRPs - NCE Cyprus conference Sep 2022 ua-cam.com/video/1bVLLqBQcLs/v-deo.htmlsi=eIG63VlboTzCBBdy
2. Bolted and Hybrid FRP joints - SEMC 2022 Cape Town South Africa Conference ua-cam.com/video/M_sUvfkKN7s/v-deo.html
3. Steel end plate joints modelling - SEMC 2022 Cape Town South Africa Conference ua-cam.com/video/-SwcX198ITo/v-deo.html
4. Resin inject bolted FRP bridge connections - NetComposites FRP bridges 2012 London, UK ua-cam.com/video/wMWlSTlxv-0/v-deo.html
5. Modelling push test - SEMC 2010 Cape Town South Africa ua-cam.com/video/RCFvRIBNgBQ/v-deo.html
6. FRP beam-to-column Joints CICE 2012, Rome Italy ua-cam.com/video/9H6-PxcaTdk/v-deo.html
7. Behaviour of headed stud in steel metal decking ua-cam.com/video/hYfHIYV60i8/v-deo.html
Subscribe to my UA-cam
www.youtube.com/@DrJQureshi
Follow Me Twitter
DrJQureshi
Follow Me on Instagram
drjqureshi
Follow me on LinkedIn
www.linkedin.com/in/jawed-qureshi-2370191a2/
Your queries:
What is a headed shear stud and how is it used in construction?
How does the profile of steel sheeting affect the behavior of headed shear studs in push tests?
What are the common methods for conducting a push test on headed shear studs?
What factors influence the shear strength of headed shear studs when used with profiled steel sheeting?
How does the geometry of profiled steel sheeting impact the performance of headed shear studs in push tests?
What are the typical failure modes of headed shear studs in push tests?
How can the results of push tests on headed shear studs be used to improve structural design?
What are the standards and guidelines for testing headed shear studs in push tests?
How does the thickness of profiled steel sheeting affect the push test results for headed shear studs?
What are some real-world applications where push tests of headed shear studs with profiled steel sheeting are critical?
#steeldesign #civilengineering #structuralengineering
Disclaimer: This material is provided on an 'as is' basis with no warranty. There is no guarantee that the material will meet your requirements, that the material is error-free, that the results obtained from the use of the material will be reliable, or that any errors in the material will be corrected.
Copyright: Dr Jawed Qureshi holds the copyright to this conference video presentation series. He is a senior academic in London, UK, with over 20 years of international experience. Dr Qureshi holds a PhD in steel-concrete composite structures from the University of Leeds and has prior teaching experience at the University of Warwick. He is currently working at the University of East London, London, United Kingdom, as a Senior Lecturer in Structural Engineering and Design.
Переглядів: 174
Відео
How Beam-to-Column Joints are Redefining FRP Structures | Conference presentation | Dr Jawed Qureshi
Переглядів 1897 годин тому
Dr Jawed Qureshi presents his conference presentation on, "Understanding Beam-to-Column Joints in Pultruded FRP Frames" • Problem: Traditional steel joints don't work the same in pultruded FRP frames. • Solution: Study on moment-rotation behavior to improve joint design for FRP structures. • Benefits: o Better joint performance and safety in FRP frames. o Insights into structural integrity and ...
The TIP About Steel-Concrete Beam Modelling Every ENGINEER Should Know
Переглядів 569День тому
Dr Jawed Qureshi presents simple finite element modelling steps to realistically model steel-concrete composite beams. This is part of my conference presentation at SEMC 2010 in Cape Town South Africa. If you are an engineer and struggling to understand how to model steel-concrete composite beams or short push test then this video is for you. The video covers the context, model creation, contac...
Why Resin-Injection Bolts are Game Changers for FRP Bridges | Conference paper | Dr Jawed Qureshi
Переглядів 98814 днів тому
Dr Jawed Qureshi presents his conference presentation on, “ Resin injected bolted connections: A step towards achieving slip-resistant joints in FRP bridge engineering.” • Problem: Traditional bolts for steel bridges don't work well for FRP bridges. • Solution: Resin-injected bolts provide slip-resistant connections for FRP bridges. • Benefits: o Improved slip and fatigue resistance. o Cost-eff...
Understanding Steel End Plate Joints: Insights for Engineers | Conference paper | Dr Jawed Qureshi
Переглядів 61021 день тому
Dr Jawed Qureshi explains the behaviour of steel end plate bolted joints, focusing on both simple and moment-resisting joints. Through detailed explanations and real-world examples, you'll discover how experimental data and finite element models validate the performance of flush and extended end plate joints. Dr Qureshi's research investigates critical failure modes and the impact of joint deta...
Why FRP composite is such a desirable material? | Buildings and Bridges | Conference paper
Переглядів 56521 день тому
Dr Jawed Qureshi presents his exciting new research on cyclic behaviour of Fiber Reinforced Polymer joints for buildings and bridges. Will Fibre Reinforced Polymer composite material transform construction industry? Are you ready to dive into the world of modern civil engineering? In this video, I'm exploring the Fiber Reinforced Polymer (FRP) composites and their game-changing role in construc...
11 Shear Design in beams - How to design shear reinforcement | Eurocode 2 Concrete Design TUTORIAL
Переглядів 598Місяць тому
Dr Jawed Qureshi explains shear design in reinforced concrete beams. Learn how to design shear reinforcement/stirrup/shear links. This video is part of the Eurocode 2 Concrete Design lecture series. Not designing a concrete beam for shear force can lead to sudden brittle failure. We want beams to fail in a gradual, ductile manner. Often, stirrups - shear links or metal loops around the top and ...
10 Shear design of RC beams - Lecture | Eurocode 2 Concrete Design
Переглядів 458Місяць тому
Dr Jawed Qureshi presents shear design of reinforced concrete beams to Eurocode 2. This video is part of the Eurocode 2 Concrete Design lecture series. Shear design for concrete beams ensures they don't fail under diagonal forces, which try to slice through the beam. Here's how it works: 1. Calculate Shear Force (V): Determine the force acting along the beam, trying to cut it. 2. Concrete's Cap...
09 How to design Doubly Reinforced Beams | Eurocode 2 Concrete Design TUTORIAL
Переглядів 284Місяць тому
Dr Jawed Qureshi covers two tutorial examples on doubly reinforced beam design to Eurocode 2. This video is part of the Eurocode 2 Concrete Design lecture series. Designing doubly reinforced concrete beams according to Eurocode 2 involves adding steel reinforcement on both the tension and compression sides to handle higher loads. The process begins with determining the loads the beam will suppo...
08 Doubly reinforced beam design Example 1| Eurocode 2 Concrete Design
Переглядів 217Місяць тому
Dr Jawed Qureshi presents a worked example doubly reinforced beam design to Eurocode 2. This video is part of the Eurocode 2 Concrete Design lecture series. Concrete is weak in tension and strong in compression. When a beam is subjected to bending moment, the top side is under compression and bottom under tension. Due to its weakness in tension, concrete beam needs reinforcing steel bars on the...
07 Doubly reinforced beam design Lecture | Eurocode 2 Concrete Design | Dr Jawed Qureshi
Переглядів 297Місяць тому
Dr Jawed Qureshi covers the theoretical background to the design of doubly reinforced concrete beams according to Eurocode 2. This video is part of the Eurocode 2 Concrete Design lecture series. When concrete alone cannot withstand the heavy applied moment on the compression side, we add compression bars. This is termed a doubly reinforced concrete beam, where bars are used on both the tension ...
06 Singly reinforced beam design Tutorial | Eurocode 2 Concrete Design | Dr Jawed Qureshi
Переглядів 419Місяць тому
06 Singly reinforced beam design Tutorial | Eurocode 2 Concrete Design | Dr Jawed Qureshi
05 Singly reinforced beam Example | Eurocode 2 Concrete Design
Переглядів 3732 місяці тому
05 Singly reinforced beam Example | Eurocode 2 Concrete Design
04 Singly reinforced beam design - Theory | Eurocode 2 Concrete Design
Переглядів 4672 місяці тому
04 Singly reinforced beam design - Theory | Eurocode 2 Concrete Design
03 Material properties and stress-strain curves | Singly reinforced beam design to Eurocode 2
Переглядів 2872 місяці тому
03 Material properties and stress-strain curves | Singly reinforced beam design to Eurocode 2
02 Reinforced concrete design civil engineering applications| Singly reinforced beam to Eurocode 2
Переглядів 3013 місяці тому
02 Reinforced concrete design civil engineering applications| Singly reinforced beam to Eurocode 2
01 What is reinforced concrete design in Civil Engineering? | Singly reinforced beam to Eurocode 2
Переглядів 4123 місяці тому
01 What is reinforced concrete design in Civil Engineering? | Singly reinforced beam to Eurocode 2
27 Blast loading in ABAQUS for a sandwich plate under explosive loading
Переглядів 3853 місяці тому
27 Blast loading in ABAQUS for a sandwich plate under explosive loading
26 Buckling of Aluminum CAN - ABAQUS Tutorial | 3D Modeling
Переглядів 4073 місяці тому
26 Buckling of Aluminum CAN - ABAQUS Tutorial | 3D Modeling
25 Connecting Lug Abaqus Tutorial | 3D Modeling
Переглядів 2233 місяці тому
25 Connecting Lug Abaqus Tutorial | 3D Modeling
How to calculate reactions at supports | Three-pin frame
Переглядів 3384 місяці тому
How to calculate reactions at supports | Three-pin frame
How to calculate sfd and bmd Dr Jawed Qureshi
Переглядів 2994 місяці тому
How to calculate sfd and bmd Dr Jawed Qureshi
Overhanging beam support reactions | Shear force and bending moment diagram
Переглядів 2114 місяці тому
Overhanging beam support reactions | Shear force and bending moment diagram
Cantilever beam shear force and bending moment diagram
Переглядів 8054 місяці тому
Cantilever beam shear force and bending moment diagram
Shear force and bending moment diagram for simply supported beam with udl and point load
Переглядів 3704 місяці тому
Shear force and bending moment diagram for simply supported beam with udl and point load
Truss analysis method of joints Dr Jawed Qureshi
Переглядів 3464 місяці тому
Truss analysis method of joints Dr Jawed Qureshi
Force method - Indeterminate truss analysis Dr Jawed Qureshi
Переглядів 5634 місяці тому
Force method - Indeterminate truss analysis Dr Jawed Qureshi
Flexibility method - Trusses worked example Dr Jawed Qureshi
Переглядів 3085 місяців тому
Flexibility method - Trusses worked example Dr Jawed Qureshi
Shear force and bending moment diagram by Dr Jawed Qureshi
Переглядів 6035 місяців тому
Shear force and bending moment diagram by Dr Jawed Qureshi
24 - Part 5: Visualisation | Strengthening of concrete beams | ABAQUS Tutorial
Переглядів 3255 місяців тому
24 - Part 5: Visualisation | Strengthening of concrete beams | ABAQUS Tutorial
Can you please provide link for any of your videos relating to 2D multi storey steel structure subjected to post earthquake fire
Yes, sure. I’ll try to create videos in due course. I’m not aware of any other authentic source for this topic.
Please use these time stamps to jump between sections: ⏰ TIMECODES ⏰ 00:00 - Introduction 00:52 - What is a composite beam? 02:40 - What is a push test? 04:20 - Details of experiment 06:27 - FE model and mesh 07:49 - Boundary conditions and load application 10:47 - Material models 13:47 - Results Load-slip behaviour 15:32 - Deformed shape and stress contour plots 18:29 - Conclusions
⏰ TIMECODES ⏰ 00:00 - Introduction 01:10 - Background 01:59 - Test Configuration 06:06 - Test Results (Failure modes) 08:11 - Test Results (Moment-rotation plots) 11:15 - Conclusions
Ola, sou fabricante de pinos STUD-BOLT no Brasil como faço para passar uma apresentação para o senhor ??
From what I understood via google translator, you want to give me presentation about stud-bolt pins as their manufacturer. We can connect via Zoom or Teams to discuss, but I'll be able to meet by mid-September. Also, I don't understand Portuguese. Would you be able to give me presentation in English?
Great sir. Sir have you made model of bond strength of concrete. ie pull out test of concrete.
Not yet. Are you talking about bond strength of steel reinforcement with concrete?
@@DrJQureshi yes sir
Basically, this is a new way to use locktite. Cool.
Yes, absolutely.
Thank you, Dr., really learning a lot from your channel, please do you have any lecture on the design of retaining wall?
I’m grateful for your kind appreciation. I don’t have a lecture on retaining wall yet? I don’t have any prepared lecture on retaining walls? But I’ll add the topic to my list of future videos. I’m assuming you are asking for design of reinforced concrete retailing walls?
*sorry for typo - *retaining walls
@@DrJQureshi Yes reinforced concrete retaining wall. Once again Thank You so much
@@kofiobeng2049 it’s my pleasure!
Thankstm kind for yr information Sir
It’s my pleasure!
Mastm Zabardastam
Thanks you.
Interesting content, thank you sir.
I appreciate your kind words.
⏰ TIMECODES ⏰ 00:00 - Introduction 00:32 - What are shear connectors? 02:35 - What is realistic way to model beam? 03:55 - Experimental push test 04:43 - What is favourable and unfavourable stud position? 05:49 - Geometry and mesh 07:30 - How to get static response from dynamic analysis? 08:15 - Constraints and contact interactions 10:46 - Materials models 13:51 - Results - Load-slip behaviour 15:10 - Results - Failure modes.
Is there any literature for shear connectors? I've seen in books angulars, spiral bars, and the studs, but I haven't seen how to calculate special cases or if there's any condition for those.
I think the main design codes provide guidance on headed round shear studs only. My former colleague at University of Warwick, Prof R P Johnson has some information in his book. But I’m not aware of a complete book on special shear studs. You’ve made me inquisitive now. I’ll ask friends in industry to get more information.
@@DrJQureshi thank you for tour answer and sharing your knowledge
Thanks.
You're welcome
An interesting problem with a very interesting idea for the solution. Have you done any tests with the bolts off center in their holes or holes in the plates being joined off center with each other? As soon as anyone starts assembling these in the field, the nice alignment in your experiments won't happen - if you have building contractors doing the assembly, there's a fair chance everything will be tightened with an impact wrench too 😞. Using fasteners with similar stiffness and thermal expansion properties to the materials they join would be a more likely way forward for using these materials in structural applications, as for an assembly with hundreds or thousands of bolted joints, I can't see anyone agreeing to injecting resin into every one of them unless there's literally no other possible way. A design code which makes allowances to account for the fastener properties being so different to the material they fasten but using conventional steel bolts is also more likely.
Tests are not done yet on holes or plates being off centre. However, I’ve a journal paper on creep and fatigue resistance for FRP bridges. I’ll soon share these results too on UA-cam. The idea is to expand the research to bridge trusses. The research is mainly aimed at slip and fatigue resistance required in bridges. Thanks for your very insightful message. You’ve given me some new ideas to take the research forward; I really appreciate that.
You are absolutely right, in practice nice alignment will not happen. That’s why we want to try these connections without bolt centreline jig used in this work. Thanks for very useful insights.
Dr Qureshi, this was an interesting video! A few questions from a mechanical designer (but not a degreed engineer): Using steel fasteners with FRP materials results in large mismatches of modulus of elasticity and coefficient of thermal expansion. With the sample fasteners and tightening torque used (M16 @ 88Nm), I got an estimated clamping force of 27.5kN, spread over a relatively small area from the bolt/washer to the FRP. This is a low initial strain for this size bolt, in a typical steel structure fabrication the clamping load might be four times as much or more. This presumes a static temperature, when in reality most environments could see a swing of say, 50C over a year. I would guess that this can lead to significant changes in clamping force even without factoring in relaxation of the FRP. Would this indicate that mechanically clamped joints in FRP would be better served with more, smaller steel fasteners with larger bearing surfaces that could have greater strain applied during installation? Perhaps including more "spring" effect, such as using Belleville-style washers? Perhaps development of reliable FRP or monolithic plastic fasteners might be more appropriate. I do think that a polymer injection as you present could still be beneficial in either case.
Yes, I agree that the preload is not much. But due to FRP being a soft material, more bolt tightening leaves impression on FRP plates. So, load transfer due to friction cannot be relied upon. Perhaps the way forward can be to use lesser grade bolts such as grade 4.6 instead of 8.8, if available in market. Or FRP bolts can be explored too. I’m not sure if my answer is very clear and straight. But you’ve raised an interesting point and given me a different perspective. I’m grateful to you for sharing your knowledge.
They made a song about this. I remember singing it when I was a kid.😂😂😂london bridges😂😂😂
Thanks, I didn’t know that.
You know, I am honoured the algorithm thought even a moment of this would be relevant to my interests 😂
Thanks.
Thanks!
Welcome!
For structures like canopies with corrugated sheets connected to purlins, it seems that bolt spacing requirements aren't strictly followed. Does the Eurocode's bolt spacing rule apply only to critical connections like beam-column and beam-to-beam joints? What is the rationale behind this rule?
I think the most Eurocode provisions are based on plate to plate mild steel hot rolled steel plate connections.
I don’t know how Eurocode deals with connections having cold formed thin sheeting and hot rolled thick sections. Please share some practical information with me at drjqureshi1@gmail.com. I’ll be grateful for your kind cooperation.
Why is a thread check for bolts not required in Eurocode for bolt connections? How can the appropriate screw thread size be determined, and does the screw thread size matter if all other checks, such as bearing, shear, torsion, block shear, and combined actions, are satisfied?
Generally, increase in thread size reduces the connection resistance. I think it will certainly affect bearing resistance.
Thank you
Sri Lanka available more examples
Thanks, yes absolutely. Please share them with me.
Thanks sir, hope continue to explain eurocode -2 ( column, slab, wall). 😊
Yes, sure. Thanks for your kind support.
Thanks, Sir. For a fixed moment beam, it will be wL^2/12? right?
Yes, for fixed beam, the moment at fixed end will be wl2/12. Mid span moment will be lower than the mid span moment of a simply supported beam.
@@DrJQureshi Thanks
Hi, is partially threaded bolt better than fully threaded bolts as far as design strength of connection is considered, as the area of fully threaded bolts will be less than the shank of partially threaded bolts
You are right absolutely. Threads normally reduce not only the strength of the bolt but strength of connecting plates as well. For better strength bolt shank that is in contact with plates should be unthreaded.
@@DrJQureshi thanks for the clarification
Kind sir Can you brie Super Dead
Sorry I don’t understand the question. Please explain again, I’ll respond.
Some soft wear included a super dead load, can you explain it
@@Ravind698 I think it may refer to dead weight of super structure, that means above ground level.
In the provided example, you have assumed a theta value of 21.8 degrees. When designing, how to decide which theta value to adopt, whether it should be 21.8 degrees, 45 degrees, or a value in between. I think people prefer using 45 degree in design since it would give the greatest Vrd,max.
You are right; for ease, many designers assume the value of theta to be 45°. However, when a beam supports a uniformly distributed load, the value of theta should be 21.8° or roughly 22°. For a beam with point loads, a higher value of theta should be used. The common practice is to use 45° for beams supporting point loads, which is the maximum value as well. In old British codes (BS110), we did not have a choice; the value of theta was fixed at 45°. Assuming 45° is the worst-case scenario, which means we are on the safe side. There is a direct formula for working out the value of theta in IStructE Technical Note 4 on "Designing a Concrete Beam". I have placed this formula in the shear design folder at tinyurl.com/JQureshiConcrete. It is my pleasure to be of any help.
@DrJQureshi Thank you, sir. I have one question that might not be related to this topic. For the design of cantilever retaining walls, why do we use the toe as the pivot for the bearing capacity check(geo)? However, for the structural member design and detailing (str) (bearing capacity), we take the pivot point in the centreline of the base.
@@marco-mz3wx I’m not sure if I’m completely clear about the answer myself. I’ll get back to you after confirming with my colleagues.
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
You can DOWNLOAD lectures at tinyurl.com/JQureshiConcrete No Sign In required!
I have a simple question for you all. Democrats tout the benefits of DEI and make arguments that DEI is good for our society, and yet when a DEI hire is mentioned, Susan Rice and many Democrats find it offensive. The question is, why? Why Democrats do not want to own DEI as the preach. This is coming from a lifelong Democrat.
Thanks for the comment. I’m not sure if the question is relevant here.
Reminded me of my dissertation. Thank you for sharing the information
Thanks Sufiyan.
Thanks!
You are always welcome.
End plate connection transfer BM
Yes, extended end plate connection transfer bending moment.
Partial depth end plate joint is generally considered as simple or nominally pinned.
Although flush end plate, where plate covers entire depth of beam section, is a semi-rigid joint, but it is assumed as simple joint in the UK.
End plate connections are the most popular steel connection in Europe and North America.
⏰ TIMECODES ⏰ 00:00 - Introduction 00:55 - What are simple and moment-resisting joints? 02:41 - Experimental data 04:18 - FE validation model 06:01 - Comparison of FE and experiments 06:55 - Failure modes 07:21 - Parametric study 09:19 - Reflection on shortcoming of research 12:49 - Preview of next conference presentation
Excellent insightful content Dr. Very detail.💯
Thanks for kind comment and 100% marks! I now have to keep up to this quality.
@@DrJQureshi You have always been Dr. 🙂Clarity is always next level.
@@buddhikapremaratne9237 You are always generous and kind in your comments. Learning UA-cam is in itself a personal journey for me. Glad now it is helping people.
I have a problem to connect a rigid wire to 3D wire beam element. I find many tutorial about how to constraint a rigid body to 3D solid. However it seems the prcedure diffrent in 3D wire? I wish if you could just give me some hint or refer me to another vedio?? Thank you so much for shearing!
I don’t have any video to refer to. I’ll try it myself and let you know. Let me have more details. What are you trying to model?
@@DrJQureshi Thank you for your willingness to help me. I intent to conduct a parametric study on torsional lateral buckling, focusing on how the stiffness of lateral support affects the LTB phenomenon. In this study, I am using 3D deformable beam elements, and the loads are applied to the neutral axis nodes. To include the significant effect of the load level, I intend to apply both the load and a spring to the upper flange. Initially, I simulated this setup by "welding" columns to the nodes, which worked well. However, when I attempted to use 3D discrete rigid elements instead of columns and connect them to the deformable beam, I encountered error messages.
@@Ein4alle Let me look into it. I'll get back to you, but there will be delay in my response as I'm annual leave currently.
@@DrJQureshi The problem is solved. Thanks for your assist!
⏰ TIMECODES ⏰ 00:00 - Introduction 00:24 - What is FRP? 01:46 - Where to use FRP in Civil Engineering 02:34 - Why FRP is such a desirable material? 04:29 - Test arrangement 05:50 - Test results 09:20 - Failure modes 11:09 - Conclusions
Great presentation
Glad you liked it
Very useful thank you
It is my pleasure to be of any help to you.
thanks for your contribution Sir.
Appreciate your kind comments