可恢复功能预制装配式损伤可控钢质节点抗震性能试验研究  

Experiment study on seismic performance of earthquake-resilient and damage-controllable prefabricated steel joints

作　　者：颜桂云[1] 余勇胜 吴应雄[2] 郑莲琼[1] 薛潘荣 Yan Guiyun;Yu Yongsheng;Wu Yingxiong;Zhen Lianqiong;Xue Panrong(Fujian Provincial Key laboratory of Advanced Technology and Information in Civil Engineering,Fujian University of Technology,Fuzhou 350118,China;Fuzhou University,Fuzhou 350116,China;Fujian Provincial Erjian Construction Group Corp.Ltd.,Fuzhou 350001,China)

机构地区：[1]福建工程学院福建省土木工程新技术与信息化重点实验室,福建福州350118 [2]福州大学,福建福州350116 [3]福建省二建建设集团有限公司,福建福州350001

出　　处：《土木工程学报》2021年第8期87-100,共14页China Civil Engineering Journal

基　　金：国家自然科学基金(51878174);福建省自然科学基金(2019J01778);福州市科技计划项目(2018-G-31)。

摘　　要：提出一种震损后可恢复功能预制装配式损伤可控钢质节点,该节点由带削弱型约束钢板阻尼器的损伤可控钢质铰、钢套筒约束节点核心区、预制混凝土梁柱等构成。进行预制装配式损伤可控钢质节点的低周往复荷载试验,然后在该试验的基础上仅更换钢质铰中破坏的削弱型约束钢板阻尼器,进行第2次试验,最后进行现浇钢筋混凝土节点在低周往复荷载下的对比试验。考察各节点的破坏模态、滞回曲线、骨架曲线、承载能力、强度退化、刚度退化、耗能能力和延性等抗震性能指标,通过预制装配式损伤可控钢质节点的2次试验抗震性能指标,探讨其震损后可恢复功能的工作性能。结果表明:预制装配式损伤可控钢质节点的破坏集中在钢质铰中可更换削弱型约束钢板阻尼器上;装配式节点破坏模态、损伤程度可控,具有良好的承载能力、耗能能力和延性等抗震性能;第2次试验中装配式节点前期刚度有所下降,但后期各项抗震性能与第1次试验基本一致,表明装配式节点在震损后其功能可恢复。An earthquake-resilient and damage-controllable prefabricated steel joint after earthquake damage was developed.The joint was composed of damage-controllable steel hinges with weakened constrained steel-plate dampers,a core area of the joint constrained by steel sleeves,precast concrete beams and precast columns.First,the prefabricated steel joints were tested under low-cycle reciprocating load.Then,the weakened constrained steel-plate dampers damaged in the steel hinge were replaced,and the second test was carried out.Finally,a comparative test of cast-in-place reinforced concrete joints under low-cycle reciprocating load was conducted to investigate the seismic performances of joints,such as failure mode,hysteresis curve,skeleton curve,bearing capacity,strength degradation,stiffness degradation,energy dissipation capacity and ductility.By analyzing these seismic performance parameters of the prefabricated steel joints in the two tests,the earthquake-resilient performance after earthquake damage was explored.The results show that damage of the prefabricated steel joints concentrates on the replaceable weakened constrained steel-plate dampers in the steel hinges.The prefabricated joints have good bearing capacity,energy dissipation capacity and ductility,and the failure mode and damage degree of the prefabricated joint can be controlled.In the second test,the stiffness of the prefabricated joint decreases in the early stage,but the seismic performance in the later stage is basically the same as that of the first test,which indicates that the function of the prefabricated joints can be restored after earthquake damage.

关 键 词：装配式节点 损伤可控钢质铰 削弱型约束钢板阻尼器 可恢复功能 低周往复荷载试验 抗震性能 

分 类 号：TU352.1[建筑科学—结构工程]