基于最弱塑性铰的钢筋混凝土框架层间变形能力简化计算方法  

A Simplified Method for Calculating Interstory Drift Capacity of Reinforced Concrete Frames Based on Weakest Plastic Hinges

作　　者：张家广[1,2] 吴斌[1,2] 

机构地区：[1]哈尔滨工业大学,结构工程灾变与控制教育部重点实验室,黑龙江哈尔滨150090 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《工程抗震与加固改造》2015年第1期1-7,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金国际合作项目(51161120360)

摘　　要：为了对增设消能支撑后钢筋混凝土主体框架进行快速抗震评估,提出了一种钢筋混凝土框架层间变形能力的简化计算方法。首先定义了钢筋混凝土框架的层间变形极限状态;然后基于框架梁柱组合件的破坏型式,确定出层间最弱塑性铰;最终计算出框架相应的层间变形能力。采用Pushover分析方法和已有的框架拟静力试验分别对框架层间变形能力简化计算结果进行验证。验证结果表明:框架的层间塑性变形能力主要取决于层间最弱塑性铰的塑性转动能力;提出的简化计算方法能够有效预测钢筋混凝土框架的层间变形能力。To conduct rapid seismic assessment of reinforced concrete（ RC） frames incorporating energy dissipative braces,a simplified method for calculating interstory drift capacity of main RC frames is proposed. The interstory drift limit state for RC frames is firstly defined. Then the weakest interstory plastic hinge is determined,based on the beam-column subassemblage failuremodes. Finally,the corresponding interstory drift capacity of RC frame is calculated. The proposed simplified calculating method for interstory drift capacity of RC frame is verified by Pushover analysis and previous RC frame cyclic tests,respectively. It shows that the interstory plastic drift capacity of a RC frame mainly depends on plastic rotation capacity of the weakest interstory plastic hinge. The proposed method can predict interstory drift capacity of RC frames with acceptable accuracy.

关 键 词：最弱塑性铰 钢筋混凝土框架 层间变形能力 层间变形极限状态 快速抗震评估 

分 类 号：TU313.3[建筑科学—结构工程] TU375.4