钢管混凝土边框内藏钢桁架组合核心筒抗震性能试验研究  

EXPERIMENTAL STUDY ON SEISMIC PERFORMANCE OF COMPOSITE CORE WALLS WITH CFT-COLUMNS AND CONCEALED STEEL TRUSSES

作　　者：张建伟[1] 耿海霞[1] 曹万林[1] 董宏英[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《工程力学》2011年第10期165-172,共8页Engineering Mechanics

基　　金：国家自然科学基金项目(50878007);北京市科技重大项目(D08050603720000);北京市教委科技计划重点项目(KZ200910005008)

摘　　要：提出了钢管混凝土边框内藏钢桁架混凝土组合核心筒,为了解其抗震性能,进行了1个钢管混凝土边框混凝土组合核心筒和1个钢管混凝土边框内藏钢桁架混凝土组合核心筒的低周反复荷载试验研究,2个试验模型为1/6缩尺。在试验基础上,分析比较了2个核心筒的承载力、延性、滞回特性、耗能能力、刚度衰减过程和破坏特征,分析结果表明:钢管混凝土边框内藏钢桁架混凝土组合核心筒抗震性能较好。在试验研究基础上,建立了钢管混凝土边框内藏钢桁架混凝土组合核心筒承载力简化力学计算模型与公式,计算结果与试验结果吻合较好。A new type of RC core walls with concrete filled steel tube （CFT） columns and concealed steel trusses was proposed in this paper. In order to evaluate its seismic performance, two specimens of 1/6 scale core walls, one with CFT-columns and the other with CFT-columns and concealed steel trusses, were tested under the cyclic loading. Based on experiment results, the load-carrying capacity, ductility, hysteretic characteristics, energy dissipation capacity, stiffness degradation and damage characteristics of the two specimens were compared and analyzed. It showed that the seismic performance of core walls with CFT-columns and concealed steel trusses was better than that with CFT-columns only. The mechanical model of the load-carrying capacity of this new composite core walls was established upon the experiment. The calculated results were in good agreement with those from the experiment.

关 键 词：钢管混凝土柱 组合核心筒 钢桁架 抗震性能 试验研究 

分 类 号：TU375[建筑科学—结构工程]