20. BRACED ROLLED STEEL BEAMS
The chapter focuses on the behavior and design of laterally supported steel beams according to LRFD provisions. It emphasizes the methods to select efficient beam sections for bending moments, determines flexural strengths, and discusses failure modes and classifications of steel beams. The chapter further outlines the nominal strength requirements and flexural design principles, including considerations for different types of beam cross-sections.
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What we have learnt
- Lateral torsional buckling is a critical failure mode for unsupported beams.
- Effective section selection is crucial for ensuring beams are both lightweight and strong.
- Nominal strength calculations are essential for various beam types in load and resistance factor design.
Key Concepts
- -- Lateral Torsional Buckling
- A failure mode that occurs in beams that are not supported laterally, causing twisting and bending.
- -- Nominal Strength
- The strength of a structural member determined under specified loading conditions, essential for safety in design.
- -- Plastic Moment Strength
- The maximum moment that a plastic section can withstand before failure, calculated based on the yield strength and section modulus.
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