预应力自复位装配式混凝土框架节点抗震性能研究  

RESEARCH ON SEISMIC BEHAVIOR OF SELF-CENTERING PREFABRICATED RC FRAME JOINT WITH PRESTRESSED TENDONS

作　　者：刘航[1] 王胜 王海深 潘鹏[3] 张国伟 

机构地区：[1]北京市建筑工程研究院有限责任公司,北京100039 [2]北京建筑大学土木与交通工程学院,北京100044 [3]清华大学土木工程系,北京100084

出　　处：《建筑技术》2018年第1期50-53,共4页Architecture Technology

基　　金：北京市自然科学基金(8162019)

摘　　要：提出一种新型装配式混凝土框架梁柱节点,其具有震后自主复位,低损伤等特点。为了解该新型节点的抗震性能,进行了新型装配式节点与现浇节点的拟静力对比试验研究,并与Open Sees有限元分析结果进行了对比。试验结果表明,新型装配式节点在梁端位移角达到1/18时,仍保持承载力不降低,结构构件基本完好,仅在梁端出现少量弯曲裂缝,且在荷载卸除后实现自主复位,裂缝基本闭合。有限元分析结果表明,该装配式节点的承载能力随初始预应力的增大而增大,同时也随耗能钢筋截面面积的增大而增大,耗能能力则主要来源于耗能钢筋。A novel prefabricated RC frame beam-column joint is presented in this paper, which may have the behaviors of self-centering and low damage after a severe earthquake. To investigate the seismic performance of the novel joint, quasi-static tests of the novel prefabricated RC frame joint and the traditional cast-in-situ RC frame joint were carried on and the test results were also compared with the finite element analysis results using OpenSees software. It can be found from the test results that when the drift ratio of the beam attains 1/18, the load capacity of the prefabricated joint keeps increasing and the structural members maintain excellence except with a few flexural slight cracks at the end of the beam. When unloaded, the joint recovered self-centering and the cracks closed. The finite element analysis results show that the load capacity of the prefabricated joint will be improved with the increase of initial prestressing force and the increase of the cross section area of the energy dissipating bars and the energy dissipating ability of the joint is mainly contributed by the energy dissipating bars.

关 键 词：自复位 无粘结预应力筋 装配式混凝土结构 框架节点 耗能钢筋 

分 类 号：TU973.31[建筑科学—结构工程]