Why Stiff Members Attract More Forces in Structures | IStructE Structural Behaviour Course

In this lecture, Dr Jawed Qureshi explains how member stiffness affects the distribution of internal forces in structures. This topic is important for civil and structural engineering students who want to understand the difference between determinate and indeterminate structures. Using a single bay portal frame example, the lecture shows what happens when the horizontal beam becomes much stiffer. You will learn the key rule that in indeterminate structures, stiffer members attract more forces, which changes the bending moments and internal force distribution. This video is part of Dr Jawed Qureshi’s course on The Institution of Structural Engineers 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 00:51 – Example – Single Bay Frame 04:54 – Solution using S-Frame software Related Videos in the IStructE Structural Behaviour Course https://tinyurl.com/JQStructural Click on link above to watch first 25 lectures in series. 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. Beam Deflected shape examples – I https://youtu.be/EEgTbcSIISQ 35. Beam Deflected shape examples – II https://youtu.be/NZGgDX2mR-Y 36. Beam Deflected shape examples – III https://youtu.be/jHaV75HZZ8c 37. Frame Deflected shape examples – I https://youtu.be/aJEPII3O-1A 38. Frame Deflected shape examples – II https://youtu.be/XiS4eDojHis 39. Frame Deflected shape examples – III https://youtu.be/9w0qfRIxtD0 40. Frame Deflected shape examples – IV https://youtu.be/MsVXXyzmIFU 41. Frame Deflected shape examples – V https://youtu.be/bBdzFee92fU 42. Cantilever Frames https://youtu.be/vcWutpdv_f4 43 Simple Frames https://youtu.be/5b6TgwmqwaY 44 Complex Frames https://youtu.be/Rd8f14FrJiw 45 Propped Cantilever Frames https://youtu.be/0oqcFQWtL6A 46 Internal Pin Frame Analysis https://youtu.be/dTEC2c59TCo 47 Internal Pin Frame with values https://youtu.be/LNXgQ4lOv48 48 Approximate BMD Frames https://youtu.be/LX4LfKP-9Ro 49 BMD Mult-bay Frames https://youtu.be/Fmy6eYfCTL0 50 Plastic collapse mechanism https://youtu.be/c-X_eIbg-rU 51 Plastic collapse moment https://youtu.be/9OTRNiyD_KA 52 Stiffness of single bay frame https://youtu.be/OVn5VC6BDqU 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/ • Instagram: https://www.instagram.com/drjqureshi/ Common Queries Answered: • What is structural member stiffness? • What are indeterminate structures in engineering? • How stiffness changes force distribution? • Do stiff members attract more forces? • What is static indeterminacy value? • How to identify determinate structures? • Why moments change in portal frames? • Does stiffness affect determinate structures? • How to model frames in software? • Why internal forces shift in structures? #istructe #structuralengineering #civilengineering ________________________________________ Disclaimer: This content is for educational purposes only and does not constitute professional advice. It is provided without any guarantees or warranties. All rights are reserved by Dr Jawed Qureshi. Dr Jawed Qureshi is a Senior Lecturer in Structural Engineering and Design at the University of East London (UEL), London, United Kingdom. He has over 25 years of international experience in structural engineering education and practice. He holds a PhD in steel–concrete composite structures from the University of Leeds and has previously worked on a major European research project titled “Connections and Joints for Buildings and Bridges of Fibre Reinforced Polymer” at the University of Warwick. Dr Qureshi is known for his practical approach to teaching and his ability to explain complex engineering concepts in a clear, simple, and engaging manner.