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在设计中通过结构分析求出构件内力,对于有侧移的结构需考虑侧移及挠曲两种重力二阶效应的影响,对于无侧移的结构只有挠曲二阶效应的影响。一般结构分析求得的是构件端部内力,须在此基础上再分析由于构件挠曲是否会使构件中某个截面的弯矩大于杆端弯矩。对钢筋混凝土偏压构件的这种挠曲二阶效应计算问题从理论上做了分析说明,并将所得结果与有关规范的计算方法予以比较,以便加深理解及合理应用。
In the design, the internal force of the member is calculated through structural analysis. For the structure with lateral displacement, the influence of the second-order effect of lateral displacement and deflection on the second-order effect of gravity should be considered. For the structure without lateral displacement, only the second-order effect of deflection is affected. The general structural analysis of the end of the component force is to be based on the analysis of whether the component bending will make a member of a section of the bending moment is greater than the rod end bending moment. The calculation of the second-order deflection effect of reinforced concrete biasing members is theoretically analyzed and explained, and the results obtained are compared with those of the relevant specifications in order to deepen the understanding and reasonable application.