钢-混凝土组合框架抗震目标位移的计算方法分析

Analysis of the Seismic Target Displacement Calculating Method of Steel-concrete Composite Frame Structure

在已有的钢管混凝土柱和钢-混凝土组合梁抗震性能分析理论基础上,探讨了在地震作用下钢-混凝土组合框架结构的屈服目标位移和极限目标位移的主要影响因素,提出了相应的计算方法。通过钢—混凝土组合框架结构层间屈服位移和结构侧移曲线的求解来确定结构的屈服位移,避免了侧移曲线中各种参数的不确定性带来直接求解侧移的困难。本文提出的方法同时解决了塑性极限状态的位移求解,具有简单有效的特点,可用于组合框架结构基于位移抗震设计中的目标位移计算。

Based on existing seismic performance analysis theory of steel-concrete columns and steel-concrete composite beam, the main influence factors of the bending target displacement and the terminal target displacement of steel-concrete composite frame structure under the effect of the earthquake are discussed, and the corresponding calculating method is proposed. The structural bending displacement is confirmed by the solution of the inter-layer bending displacement of steel-concrete composite frame structure and structural lateral curve, avoiding the difficulties of solving lateral displacement directly by the uncertainty of various parameters. This method can solve the plastic limit state displacement effectively and simply, and can also apply to the target displacement calculating of composite frame structure based on displacement seismic design.