【摘要】 震后框架结构多为"强梁弱柱"破坏,即框架柱破坏严重,框架梁震害较轻.针对该问题,运用SAP2000软件,以某实际工程为例,采用静力非线性分析方法对框架结构在地震作用下的塑性破坏机制进行研究,采用增大框架柱钢筋强度等级及柱端弯矩增大系数两种方法改善结构破坏机制.结果表明两种方法均能增大柱的抗弯强度,增大结构延性,实现框架结构的强柱弱梁机制.更多还原

【Abstract】 According to the performance of frame structure after the earthquake,most of the frame structures are "weak column strong beam".Columns damaged seriously,while beams’ earthquake damage is lighter.This paper takes a practical for example,analyzes the failure mechanism of the frame structure under earthquake using static nonlinear analysis,and discusses the influence of concrete frame structure failure mechanism that changing the moment magnifying factors at column ends and steel strength grade.The result shows that both methods can increase the flexural strength of column,improve the structural ductility,and achieve the purpose of "strong column weak beam".更多还原