动力荷载下传统风格建筑双梁-柱节点抗震性能试验研究  

Experimental research on the seismic performance of dual-lintel column joints in traditional style buildings under dynamic loading

作　　者：薛建阳[1,2] 马林林[1] 隋龑[1] 董金爽 XUE Jian-yang;MA Lin-lin;SUI Yan;DONG Jin-shuang(School of Civil Engineering,Xi′an University of Architecture&Technology,Xi′an 710055,China;Key Lab of Structural Engineering and Earthquake Resistance of the Ministry of Education(XAUAT),Xi′an 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《振动工程学报》2021年第1期38-47,共10页Journal of Vibration Engineering

基　　金：国家科技支撑计划课题(2014BAL06B03);国家自然科学基金资助项目(51978568);陕西省科技创新团队计划(2019TD-029);陕西省自然科学基础研究重点项目(2020JZ-50)。

摘　　要：为研究传统风格建筑混凝土双梁-柱节点的破坏特征及抗震性能,进行了2个节点试件的动力循环加载试验,包括一个典型传统风格建筑混凝土双梁-柱节点和一个单梁-柱节点。观察了节点试件的受力过程及破坏特征,研究了试件的荷载-位移滞回曲线、骨架曲线、承载能力、刚度及承载力退化、延性和耗能能力,并对其破坏模式进行了分析。研究结果表明:相对于单梁-柱节点,传统风格建筑混凝土双梁-柱节点承载力和刚度较高,其耗能能力和位移延性略小于单梁-柱节点;两者刚度退化规律基本一致。总体上,传统风格建筑混凝土双梁-柱试件的变形及耗能能力较强,抗震性能良好。在试验研究的基础上,利用ABAQUS软件对传统风格建筑混凝土双梁-柱节点进行了非线性数值模拟,研究了轴压比、混凝土强度、上下梁间距等参数对其力学性能的影响。结果表明:随混凝土强度和上下梁间距的增大,试件的承载力随之提高;随轴压比增大,试件的承载力有一定提高,但延性降低;随混凝土强度的提高,延性逐渐降低。In order to research the seismic performance and failure characteristics of dual-lintel column joints in traditional style buildings,two joint specimens are tested under dynamic cyclic loading,including a typical dual-lintel column joint and a single-lintel column joint.The failure process and characteristics are obtained.The hysteretic loops,skeleton curves,bearing capacity,degradation of strength and stiffness,ductility,energy dissipation and failure modes of the joints are analyzed.The results show that the bearing capacity and stiffness of the dual-lintel column joint are higher than those of the single-lintel column joint.However,the energy dissipation and ductility of the dual-lintel column joint are slightly smaller than those of the single-lintel column joint.The regularity of rigidity degeneration for the joints is basically the same.Generally,the dual-lintel column joint in traditional style buildings has better deformability and energy dissipation,showing better seismic performance.Based on the experimental research,the nonlinear numerical simulation of dual-lintel column joints in traditional style buildings is developed by the ABAQUS software.The influence of axial compression ratio,concrete strength and spacing between dual lintels on the joints is studied.It is shown that the bearing capacity of the models increases with the increment of concrete strength and spacing between dual lintels.In addition,the bearing capacity of the models improves,but the ductility decreases with the increment of the axial compression ratio.And the ductility of the models decreases with a larger concrete strength.

关 键 词：传统风格建筑 双梁-柱节点 抗震性能 动力循环加载 破坏模式 

分 类 号：TU398[建筑科学—结构工程] TU311.3