Horizontal stiffener in a plate girder is provided to safeguard against:
Show Hint
- Yielding
- Compression buckling of web plate
- Shear buckling of web plate
- Prevent excessive deflection
The Correct Option is B
Solution and Explanation
Step 1: Understanding the role of different stiffeners.
• Vertical (Intermediate) Stiffeners: These are primarily provided to prevent shear buckling of the web by dividing it into smaller panels.
• Horizontal (Longitudinal) Stiffeners: These are placed in the compression zone of the web to prevent compression buckling caused by bending stresses.
• Bearing Stiffeners: These are provided at points of concentrated loads or supports to prevent local web yielding or crushing.
Step 2: Conclusion for Horizontal Stiffeners.
When a plate girder is subjected to bending, one part of the web is in tension and the other is in compression. The compression part of the thin web tends to buckle laterally. The horizontal stiffener provides lateral restraint, thereby increasing the resistance against buckling due to these compressive bending stresses.
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