Bottom flange is the lower horizontal structural element of a bridge girder that resists compressive forces and provides stability.
The bottom flange is a critical structural component in bridge girders, typically an I-beam or box girder configuration, designed to withstand compressive stresses from bending moments. It works in conjunction with the top flange and web to distribute loads efficiently across the span, ensuring structural integrity and load-bearing capacity. In most bridge designs, the bottom flange experiences compression when the girder is subjected to positive bending moments (sagging).
该组件会出现在以下整机或工业产品中。
诱因 → 失效模式 → 工程缓解
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The bottom flange primarily resists compressive forces during positive bending moments, working with the web and top flange to maintain structural stability and distribute loads across the bridge span.
Bottom flanges are typically welded to the web using full-penetration groove welds or connected with high-strength bolts in splice connections, following AWS D1.5 or EN ISO 5817 standards for bridge welding.
Visual inspection for defects, ultrasonic testing for weld quality, dimensional verification per design drawings, and coating thickness measurement for corrosion protection systems.
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