How to Find the Flexural Strength, Shear Strength, and Stiffener Sizes of Plate Girders

Discover the essentials of plate girder design in this comprehensive guide! Learn how to calculate flexural and shear strengths, understand the role of stiffeners, and master the intricacies of girder dimensions.
Video Content:
- Dive deep into calculating the flexural strength of plate girders, distinct from standard beams.
- Explore how to accurately determine the shear strength of girders and the impact of stiffeners and their spacing.
- Gain insights on choosing the right size and dimensions for intermediate stiffeners and their welds.
- A detailed analysis of bearing stiffeners, including methods to determine their dimensions.
- Understand the AISC guidelines for nominal flexural strength based on tension flange yielding.
- Learn about the critical compression flange stress and its dependency on the flange's compactness.
- Delve into lateral-torsional buckling: its causes, prevention, and critical stress computation.
- Comprehensive overview of shear strength calculation for plate girders, considering pre and postbuckling strengths.
- Practical advice on selecting and detailing transverse and bearing stiffeners according to AISC requirements.
🕒 Timelines:
00:00 Recap of Plate Girders
01:03 Flexural Strength
01:20 Tension Flange Yielding
02:07 Compression Flange Yielding and Buckling
03:56 Lateral Torsional Buckling
05:59 Shear Strength
09:46 Intermediate stiffeners
12:16 Bearing Stiffeners
Beam Design:
• Comprehensive Guide to...
Column Design:
• Comprehensive Guide to...
Plate Girders Explained (What is tension field action and more)
• Plate Girder Analysis:...
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[@mohamedzoohair56]

Comprehensive explanation, waiting for the example

[@FrameMindsEngineering]

Glad you found this helpful. You can find the example here: th-cam.com/video/l8bzAMgQhyM/w-d-xo.htmlsi=wcogxTBmBqUyouNo

[@mommonny172]

Good Explaination, Thank you!

[@halynatonkoshkura6310]

Excellent explanation as always 🔥🔥

[@user-be5xy8tc1f]

👍👍👍

[@mommonny172]

When V_c1=V_c2 how to determine the value of
ho_w? Thanks

[@FrameMindsEngineering]

Hi, the value of rho_w is always Greater than or equal to 0. It can't be negative. This is worthy to note. Furthermore it is unlikely that V_c1 is equal to V_c2. Because V_c2 is the shear buckling strength considering there is no post buckling shear strength. V_c1 considers tension field action or post buckling shear strength. That being said if you obtain a negative value for Rho_w just take it as zero. And the minimum required Moment of inertia is simply I_st2. A common practice to make life easy is to take I_st as I_st1. This assumes that rho_w is 1. But this is too conservative and can lead to an unnecessarily expensive design.

[@mommonny172]

Thank you@@FrameMindsEngineering

[@rjbronga]

Example problem video please

[@FrameMindsEngineering]

Glad you found this helpful. You can find the video here where I showed how to setup an Excel sheet to solve an example problem: th-cam.com/video/l8bzAMgQhyM/w-d-xo.htmlsi=wcogxTBmBqUyouNo