【摘要】 为实现建筑结构抗震性能化设计,本文使用简化的方法研究了梁的塑性变形需求。首先,介绍了框架侧移的组成。接着,在"强柱弱梁"和"强节点弱构件"的假定下,建立了框架梁的塑性变形需求的计算公式,所建立的公式考虑了弯矩重分配、塑性铰机制和钢材应变硬化效应等问题。最后,对一榀6层无侧向支撑的钢框架算例进行分析,通过简化方法得到的计算结果与用SAP2000非线性静力分析得到的结果进行对比,两者具有良好的一致性。更多还原

【Abstract】 In the present study,a simple method of estimating the plastic rotation of beams was studied to realize performance-based design of buildings. Firstly,the composition of steel-frame story drift was introduced. Secondly,the expressions to estimate the plastic rotation of beams,addressing moment redistribution,plastic mechanism and strain-hardening effect of steel,were developed on the basis of strong column-weak beam and strong connectionweak connected member. Finally,a case study of 6-story plane steel-frame was carried out,which shows good agreement between nonlinear static analytic results by SAP2000 and the results obtained by the proposed method.更多还原