柱增强系数取值对钢筋混凝土抗震框架塑性铰机构的控制效果  

EFFECT OF MOMENT AMPLIFICATION FACTORS OF COLUMNS ON CONTROLLING PLASTIC HINGE MECHANISM OF RC FRAMES

作　　者：杨红[1] 韦锋[1] 白绍良[1] 王珍[2] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]华东建筑设计研究院,上海200002

出　　处：《工程力学》2005年第2期155-161,共7页Engineering Mechanics

基　　金：国家自然科学基金(59878056);国家教委博士点基金(20010611021)联合资助项目

摘　　要：以我国《混凝土结构设计规范》规定的8 度区二级抗震等级平面框架为例,采用大小不同的柱弯矩增强系数进行框架设计,利用杆系非弹性动力反应分析程序PL-AFJD 对这些框架进行多波输入下的地震反应分析,识别柱弯矩增强系数取值对框架在强震下形成的塑性铰机构的控制效果,并分析达到不同控制效果的主要原因。研究结果对我国结构设计规范优化柱弯矩增强系数取值有一定参考价值。In the case of the second level aseismic requirement for regions of 8 seismicity, typical frames are designed according to Chinese design code of concrete structures. Varying moment amplification factors are used for floor columns. By means of nonlinear dynamic analytical program PL-AFJD, the responses of these frames under different earthquake excitations are obtained. The effect of the moment amplification factors on controlling plastic hinge mechanism under major earthquakes is studied, and the factors affecting the plastic hinge mechanism are identified. The results are helpful to optimal evaluation of the column moment amplification factors in Chinese concrete structure design code.

关 键 词：钢筋混凝土 框架 抗震设计 非弹性动力反应分析 柱弯矩增强系数 数值模拟 

分 类 号：TU312[建筑科学—结构工程]