工字形曲线组合梁负弯矩区侧向失稳分析

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目的为曲线组合梁结构设计提供理论依据,研究负弯矩区工字形曲线组合梁考虑上、下翼缘均发生侧向弯曲变形与扭转变形的稳定性。方法基于能量法推导等端弯矩作用下曲线钢梁上、下翼缘及混凝土板应变能,基于势能驻值定理推导曲线组合梁侧向失稳临界弯矩解析解。分析比较不同参数对临界弯矩的影响。结果曲率半径从4000 mm增加到8000 mm,临界弯矩增加了18.5%。底板宽厚比由9增加到17,临界弯矩增加了一倍;混凝土板厚度由120 mm增加到160 mm,临界弯矩增加了19.1%;钢筋数量由8根增加到16根,临界弯矩增加了
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