摘要
为了解既有框架结构的抗震性能,对既有钢筋混凝土框架结构缩尺模型振动台试验的动力相似关系进行了研究,提出了基于等屈服强度系数准则的动力相似关系设计方法,可再现结构地震作用下破坏模式。设计了某五层老旧钢筋混凝土框架结构1/5缩尺模型,进行振动台模拟地震试验。采用有限元对原型结构建模进行数值分析,无论在小震弹性试验阶段还是大震弹塑性试验阶段,数值模拟结果与试验实测结果均基本吻合,验证了本文提出的等屈服强度系数准则的构件层次配筋设计方法的可靠性,可为既有框架结构的缩尺模型设计提供参考。
In order to master the seismic performance of existing frame structures,in this paper,the simulation law of scaled model tests about existing RC frame structure was studied,the model design method according to the equivalent yield strength coefficient was put forward,which can reproduce the destructive mode subjected to earthquake excitations.One 1/5-scale specimen of existing five-story RC frame structure was designed and tested on a shaking table.The performance of prototype structure was numerically investigated by using finite element software,it is observed that the results of the finite element analyses are in reasonable agreement with the data from the shaking table tests,in terms of small earthquake elastic test stage and large earthquake elastic-plastic test stage,demonstrating the reliability of the design method of member′s level reinforcement based on equivalent yield strength coefficient,it can provide a reference for the scale model design of existing frame structures.
作者
程绍革
杨欣
朱毅秀
张伟平
CHENG Shaoge;YANG Xin;ZHU Yixiu;ZHANG Weiping(China Academy of Building Research,Institute of Earthquake Engineering,Beijing 100013,China;The Military Museum of The Chinese People's Revolution,Beijing 100038,China;Department of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《地震工程与工程振动》
CSCD
北大核心
2020年第5期1-10,共10页
Earthquake Engineering and Engineering Dynamics
基金
国家重点研发计划项目(2016YFC0700700)。
关键词
既有建筑
混凝土框架
振动台试验
动力相似关系
等屈服强度系数
existing buildings
RC frame
shaking table test
simulation law
equivalent yield strength coefficient
