带楼板梁柱强组合件抗震性能试验研究  

Experimental study on seismic performance of strong beam-column joint composite with floor slab

作　　者：岳哲萌 王啸霆 王涛[1] YUE Zhemeng;WANG Xiaoting;WANG Tao(Key Laboratory of Earthquake Engineering and Engineering Vibration,CEA,Harbin 150080,P.R.China;Civil Engineering Department,Tsinghua University,Beijing 100084,P.R.China)

机构地区：[1]中国地震局地震工程与工程振动重点实验室,哈尔滨150080 [2]清华大学土木工程系,北京100084

出　　处：《土木与环境工程学报（中英文）》2021年第3期93-100,共8页Journal of Civil and Environmental Engineering

基　　金：国家重点研发计划(2019YFE0198900);中国博士后科学基金(2018M641365)。

摘　　要：通过一按照现行中国规范中“强节点”原则设计的高层框架剪力墙结构中提取出的3个不同位置的梁柱节点缩尺模型的拟静力试验,研究框架结构中不同位置梁柱节点的抗震性能,试验采用柱端加载,同时考虑了楼板对节点抗震性能的影响,分析其延性、刚度、承载力、耗能等性能指标,并对裂缝开展情况做了详细记录,与构件的力学指标进行比对,将损伤状态与力学指标对应起来,为完善钢筋混凝土框架梁柱节点的易损性曲线及为相关结果信息提供试验依据。试验发现:框架结构不同位置的节点破坏形式不同,底层节点破坏形态表现为弯曲破坏,破坏主要集中在梁端和柱脚,节点区未发生明显破坏现象,而顶部节点节点区发生剪切破坏。结果表明:极高水平的节点区强节点系数和柱端弯矩放大系数可以完全避免梁柱节点区出现需要修补的损伤,实现节点弹性化,也不会削弱组合件的延性。Through a quasi-static test of three beam-column joint scale models extracted from the high-rise frame-shear wall structure designed according to the"strong joint"principle in the current national code,the seismic performance of beam-column joints at different positions in frame structures is studied.The test adopts column end loading,considering the influence of the floor slab on the seismic performance of the joint,and analyzes its ductility,stiffness,bearing capacity,energy consumption and other performance indicators.During the test,the development of the cracks was recorded in detail and compared with the mechanical indexes of the components to relate the damage state with the mechanical indexes.The test provides test basis for improving the vulnerability curve and relevant consequence information of the reinforced concrete frame beam-column joints.It is found that the failure modes of the joints at different positions of the frame structure are different.The failure modes of the bottom nodes are shown as bending failure,and the failure is mainly concentrated in the beam ends and column feet toe.No obvious failure in the joint area,while the shear failure occurs in the top joint area.The test results show that the strong joint coefficient and the column end bending moment amplification factor at an extremely high level can completely avoid the damage that needs to be repaired in the beam column joint area,achieve the elasticity of the node,and will not weaken the ductility of the assembly.

关 键 词：框架剪力墙结构 梁柱组合件 强节点弱构件 抗震性能 

分 类 号：TU375.4[建筑科学—结构工程] TU317