预应力混凝土梁-型钢混凝土柱框架节点抗震性能试验研究  

Experimental study on seismic behavior of frame joints of prestressed concrete beam-steel reinforced concrete column

作　　者：潘钻峰[1] 葛雄 张海鹏 曾滨[3] Pan Zuanfeng;Ce Xiong;Zhang Haipeng;Zeng Bin(State Key Laboratory of Disaster Reductionin Civil Engineering,Tongji University,Shanghai 200092,China;Yunnan Design Institute Group Co.,Ltd.,Kunming 530100,China;Central Research Institute of Buildingand Constructionof MCC Group,Bejing 100088,China)

机构地区：[1]同济大学土木工程防灾减灾全国重点实验室,上海200092 [2]云南省设计院集团有限公司,云南昆明530100 [3]中冶建筑研究总院有限公司,北京100088

出　　处：《土木工程学报》2024年第12期43-53,共11页China Civil Engineering Journal

基　　金：国家重点研发计划(2022YFC3801800);国家自然科学基金(52078368,52038010)。

摘　　要：预应力混凝土框架结构具有较好的抗裂性能和较高的承载能力,但在实际工程中,裂缝控制要求较为严格,容易出现预应力混凝土框架梁端配筋过多,进而导致梁端承载力过剩,难以实现“强柱弱梁”的抗震设计原则。针对这一问题,提出3种不同连接形式的预应力混凝土梁-型钢混凝土柱节点,通过6个预应力混凝土梁-型钢混凝土柱框架节点试件的低周反复加载试验,研究抗裂等级(影响梁预应力筋数量)、梁柱节点形式对节点破坏形态、滞回曲线、延性、刚度退化等影响规律。研究结果表明:3种不同连接形式的6个试件均发生了“梁端弯剪破坏”,而节点和柱破坏轻微,预应力混凝土框架节点通过使用型钢混凝土柱实现了“强柱弱梁”的抗震设计目标,试件延性和耗能能力较好;二级抗裂的节点试件强度退化、割线刚度退化较三级抗裂更快,抗震性能稍差;三种形式的节点中,形式2节点的强度退化、刚度退化较慢,抗震性能较好,且施工方便。For the prestressed concrete frame structures,it is difficult to meet the seismic design requirement of"strong column and weak beam".Three types of prestressed concrete beam-steel reinforced concrete column joints with different connection forms are proposed.Based on the low cycle loading test of six specimens,the influences of beam-column joint forms and crack resistance grade of beam on the failure mode,hysteresis curve,ductility and stiffness degradation of joints are studied.Results show that the"flexure-shear failure at beam-end"and slight damages at joints and columns occurs in all the six specimens.The aforementioned seismic design requirement can be realized by applying the steel reinforced concrete columns to the frame joints of prestressed concrete,and the manufactured specimens have good capabilities of ductility and energy dissipation.The strength and secant stiffness of the second-grade crack-resistant joint specimens degenerate more rapidly than those of the third-grade crack-resistant joints,and with the relatively poor seismic performance.Among the three forms of joints,the strength and stiffness of joint of form II degenerate slowly,resulting in good seismic performance,and additionally its construction is also convenient.

关 键 词：预应力混凝土梁 型钢混凝土柱 节点 抗震性能 反复加载试验 

分 类 号：TU378[建筑科学—结构工程]