火灾后SRC柱-RC梁节点滞回性能试验研究*
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（1 北京建筑大学土木与交通工程学院，北京 100044；2 北京建筑大学工程结构与新材料北京高等学校工程研究中心，北京 100044）
［摘要］为考察SRC柱-RC梁节点火灾后的滞回性能，对三个试件进行了试验研究。未过火试件A直接进行梁端低周往复荷载作用下的拟静力试验；试件B和试件C在进行拟静力试验前，首先分别进行升温时间为60min和90min的过火试验。研究表明，火灾后SRC柱-RC梁节点的延性、耗能能力等各项滞回性能指标均有下降，且下降幅度随过火时间的延长而增大。对比分析了过火时间对各项滞回性能指标的影响，并对今后进一步的研究提出建议。［关键词］SRC柱-RC梁节点; 过火试验; 滞回性能中图分类号：TU317， TU398 文献标识码：A 文章编号：1002-848X(2016)09-0075-04
Study on the hysteretic behavior of SRC column-RC beam joints after fireLi Guohua1,2, Xie Long1,2, Xu Yanlong1,2（1 School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China; 2 Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, Beijing University of Civil Engineering and Architecture, Beijing 100044, China）Abstract: In order to investigate the hysteretic behavior of SRC column-RC beam joints, the pseudo-static experiments were carried out on three specimens. The pseudo-static experiment under low cyclic loading at the beam ends was directly carried out on specimen A without undergoing the fire. Before the pseudo-static experiment, the specimens B and C had firstly been through a fire experiment, which heating time is 60min and 90min respectively. The results show that hysteretic behaviors including the ductility and energy dissipation capacity of the SRC column-RC beam joints are decreased, which reduced significantly with the increase of the heating time. The impact of the heating time on the hysteretic behaviors was compared and analyzed, and suggestions were put forward for further research.Keywords: SRC column-RC beam joint; fire test; hysteretic behavior
*北京市教育委员会科技计划面上项目（PXM2013014210000147）。作者简介：李国华，博士，讲师，Email: liguohua@bucea.edu.cn。
