足尺钢筋混凝土柱倒塌试验研究  

Collapse test study of full-scale RC column

作　　者：曾德民 李子沐 解琳琳 杜志超 马泽昊 王闻[3] Zeng Demin;Li Zimu;Xie Linlin;Du Zhichao;Ma Zehao;Wang Wen(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Beijianda Architectural Design and Research Institute Company,Beijing 100044,China;China Institute of Water Resources and Hydropower Research,Beijing 100038,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京北建大建筑设计研究院有限公司,北京100044 [3]中国水利水电科学研究院,北京100038

出　　处：《建筑科学》2022年第1期119-126,共8页Building Science

基　　金：十三五国家重点研发计划项目(2019YFE0112800);中国地震局工程力学研究所基本科研业务费专项资助项目(2019D17)。

摘　　要：钢筋混凝土柱是框架结构中抗地震倒塌的关键构件,目前众多学者以水平承载力降至85%作为构件的失效判据,缺少RC足尺柱在大变形下的受力性能分析。本文通过1个足尺现浇钢筋混凝土柱进行拟静力倒塌试验,研究试件在大变形下的滞回性能、骨架曲线及耗能能力。试验结果表明:加载点水平力-位移滞回曲线比较饱满,构件具有良好的耗能能力,极限位移角达到1/15,并且证实了以往传统水平承载力降至极限承载力85%就结束试验的标准在某些情况下偏保守,并不能反映真实的极限失稳状态,并对结构倒塌数值分析给出了位移角限值建议。Reinforced concrete column is a key member of building structure to resist earthquake collapse.At present,many scholars take the reduction of horizontal bearing capacity to 85%as the failure criterion of the member,lacking the force performance analysis of RC full-scale column under large deformation.In this paper,a full-scale cast-in-place reinforced concrete column is subjected to the proposed static collapse test to study the hysteresis performance,skeleton curve and energy dissipation capacity of the specimen under large deformation.The test results show that:the horizontal force-displacement hysteresis curve at the loading point is relatively full,indicating that the member has good energy dissipation capacity,and the ultimate displacement angle reaches 1/15,and confirms that the previous standard of ending the test when the traditional horizontal bearing capacity is reduced to 85%of the ultimate bearing capacity is too conservative and does not reflect the real ultimate instability state,and gives the suggestion of displacement angle limit value for the numerical analysis of structural collapse.

关 键 词：足尺柱 大变形 拟静力试验 倒塌 极限位移角 

分 类 号：TU398.2[建筑科学—结构工程]