Understanding beam deflection is crucial for structural engineers to predict real-world behaviour. In this video, I challenge you to identify the correct deflected shape of two beams subjected to external loads.
I will:
• Analyse beam deflection step-by-step
• Compare different options and eliminate incorrect ones
• Use shear force diagrams (SFD) & bending moment diagrams (BMD)
• Validate results with structural analysis software
This is part of Dr Qureshi’s lecture series on understanding structural behaviour using qualitative analysis. Qualitative analysis helps you understand structures, load paths, member forces, deflected shapes, and bending moment diagrams without relying on complex math. Take the quiz and download the lecture slides for a complete learning experience—ideal for civil engineering students and professionals or those studying for the IStructE Certificate in Structural Behaviour.
🔗 Download Lecture Slides: https://tinyurl.com/JQureshiStructural to follow along with the lesson.
🔗 IStructE Certificate in Structural Behaviour: https://www.istructe.org/training-and-development/qualifications-and-registrations/certificate-in-structural-behaviour/
⏰ TIMECODES ⏰
00:00 – Introduction
00:49 – Example 1 using hand calcs
08:38 – Example 1 using software S-Frame
13:07 – Example 2
📺 Related Videos in the IStructE Structural Behaviour Course https://tinyurl.com/JQStructural
1. Deflected shape of frames
https://youtu.be/9nHdrE7SUQ0
2. Bending moment diagram of frames
https://youtu.be/OydmfmUzoqc
3. Deflected shape of two-member frame
https://youtu.be/EkJudgjuG28
4. Zero Force Truss Members
https://youtu.be/5QxWIqavQ9U
5. Zero member truss examples
https://youtu.be/chpb4XK4wEI
6. Simple Beams structural behaviour
https://youtu.be/G4AhfPDAbFU
7. Truss member forces
https://youtu.be/j2oAIWPP4MY
8. Structure analysis of TRUSSES – I
https://youtu.be/gcpLHQEuBgg
9. Forces in TRUSSES and CRANES
https://youtu.be/iCdaObauNHY
10. Propped Cantilever Beam
https://youtu.be/8LNQo2ln_Ys
11. Continuous beams
https://youtu.be/uz3Th7Lutzw
12. Double Overhanging Beam
https://youtu.be/PbTyaQNGLU4
13. Two-span continuous beam
https://youtu.be/lPSwCVy2ZV8
14. Zero truss member force
https://youtu.be/qtlL8AZjXWo
15. Continuous beam moment diagram
https://youtu.be/s0UcmvlqW2k
16. Simple Truss Deflection
https://youtu.be/IC8dvF3pIEs
17. Beam with Spring Support
https://youtu.be/Uy02gf-Y9nM
18. Cables with point loads
https://youtu.be/FxZ6n1d636Y
19. Cables with UDL
https://youtu.be/AEAwf3VwWlQ
20. Cables with Distributed and concentrated loads
https://youtu.be/Ai0rRdzlI4c
21. Complex Beams Theory
https://youtu.be/jz5uiISXpLQ
22. Complex Beams Problems Part 1
https://youtu.be/02wCeUxC5xA
23. Complex Beams Problems Part 2
https://youtu.be/un6KJXMk1jA
24. Complex Beams BMD with correct values
https://youtu.be/OetqRNEYQ1Y
25. Complex Beams Approx. BMD
https://youtu.be/uWM45I-DSZk
26. Shear force diagram part 1
https://youtu.be/WFbyZE8q1Fg
27. Shear force diagram part 2
https://youtu.be/a_v5C8vUKoA
28. Shear force diagram part 3
https://youtu.be/m5qX2u_nhtY
29. Shear force diagram part 4
https://youtu.be/dVsM6VdmVAM
30. Shear force diagram part 5
https://youtu.be/eeU3iHm74cE
31. Shear force diagram part 6
https://youtu.be/uHFkhFVxp7Y
32. Match SFD with BMD
https://youtu.be/yvqUmJP-wpk
33. Natural frequency of beams
https://youtu.be/2iajHflk-Fg
34. Deflected shape examples – I
https://youtu.be/EEgTbcSIISQ
35. Deflected shape examples – II
https://youtu.be/NZGgDX2mR-Y
🌐 More Learning Resources:
• Subscribe to Dr Jawed Qureshi on YouTube: https://www.youtube.com/@DrJQureshi
• Follow Dr Qureshi on Twitter: https://twitter.com/DrJQureshi
• Connect on LinkedIn: https://www.linkedin.com/in/jawed-qureshi-2370191a2/
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📚 Common Queries Answered:
What happens when a beam bends?
Which deflected shape is correct?
How do internal pins affect beams?
Why is beam sagging important?
What is the role of hinges?
How do shear forces behave?
Why use moment diagrams in analysis?
What mistakes do engineers make?
How does software verify deflection?
Can you solve this engineering challenge?
#istructe #structuralengineering #civilengineering
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Disclaimer: This educational material is provided 'as is' with no warranty. It is intended for learning purposes only and should not be used as a substitute for professional advice. Dr Jawed Qureshi holds the copyright to this presentation. He is a Senior Lecturer in Structural Engineering at the University of East London (UEL), London, UK, with over 20 years of international experience. Dr Qureshi holds a PhD in steel-concrete composite structures from the University of Leeds, UK, and has worked on a major European research project at the University of Warwick, UK, prior to joining UEL.