The buckling of the web by diagonal compression can be prevented by which of the following? 1. The depth to thickness ratio of web can be increased 2. Web stiffness may be provided forming panels to increase the shear resistance of the web 3. Web stiffness may be provided forming panels in such a way as to create tension field action in the web to resist diagonal compression Select the correct answer.
- A1 and 2 only
- B2 and 3 onlyCorrect
- C1 and 3 only
- D1, 2 and 3
Solution
Concept
Prevention of web shear buckling
Step-by-step solution
1. Increasing the depth to thickness ratio makes the web more slender and more prone to buckling (statement 1 is wrong). 2. Stiffeners divide the web into panels, raising the shear buckling resistance (statement 2 correct). 3. Properly spaced stiffeners allow tension field action after buckling (statement 3 correct).
Explanation
Web buckling due to diagonal compression is controlled by reducing the slenderness of the web panels (through stiffeners) or by relying on tension field action.
Why the other options are wrong
Statement 1 is the opposite of the remedy, so any option containing 1 is wrong.
Shortcut
Thin web → add stiffeners, not more depth.
Common mistake
Choosing statement 1.
Correct answer: B) 2 and 3 only