中美规范对钢框架梁侧向支撑间距规定的对比

Comparison between American code and the current code of China about unbraced length on steel beam

对历年来美国规范和我国现行规范关于侧向支撑间距的规定进行对比,发现当仅设置一个侧向支撑时,我国规范的规定接近美国规范,但是当梁产生反向曲率且梁端弯矩接近全塑性弯矩时,相差却较大。

This paper presents a comparison between American code and the current code of China about unbraced length on steel beam. It finds that when one lateral brace is arranged in the midspan, the current code in China is closed to American code;but when the beam causes reverse curvature and the end moment reaches the beam＇s full-plastic moment, the difference is significantly big between each other.