附设黏滞阻尼器的传统风格建筑混凝土梁-柱节点动力循环加载性能分析  

Performance analysis of beam-column joint in traditional-style buildings with viscous damper under dynamic cyclic loading

作　　者：薛建阳[1] 董金爽 隋龑[1] 刘祖强[1] 何振华[1] 王旭杰[1] 

机构地区：[1]西安建筑科技大学,陕西西安710055

出　　处：《土木工程学报》2017年第12期18-27,共10页China Civil Engineering Journal

基　　金：国家科技支撑计划课题(2014BAL06B03);国家自然科学基金(51678478);中建股份科技研发课题(CSCEC-2012-16);陕西省科学技术研究发展计划项目(2013KW23-01)

摘　　要：进行了4个附设黏滞阻尼器及2个未附设黏滞阻尼器的传统风格建筑混凝土梁-柱节点在动力循环荷载作用下的试验研究,获得其荷载-位移滞回曲线,分析其延性、耗能能力等力学性能。结果表明:附设黏滞阻尼器的传统风格建筑混凝土梁-柱节点试件滞回曲线饱满,延性及耗能性能良好。基于试验研究结果,采用ABAQUS软件建立三维有限元模型,对试件进行数值模拟分析,研究附设黏滞阻尼器的传统风格建筑混凝土梁-柱节点的承载力、延性等性能;非线性模拟分析得出的结果与试验实测结果吻合较好。在此基础上对该类构件进行参数分析,研究轴压比、混凝土强度、方钢管屈服强度、阻尼器关键参数等对其力学性能影响。结果表明:随混凝土强度、方钢管屈服强度、阻尼系数提高,试件承载能力逐渐增大;随轴压比及混凝土强度增大,试件的承载力虽有提高,但试件延性逐渐降低;提高方钢管屈服强度,试件延性增大;随着阻尼指数的增大,试件的承载力和位移延性呈现出先上升后下降的特征。表明要提高附设黏滞阻尼器试件的抗震性能,应合理选择黏滞阻尼器的性能参数。Four beam-column joint specimens with viscous dampers and two joint specimens without viscous dampers in traditional-style buildings were tested and compared under dynamic cyclic loading, so that the load-displacement hysteretic loops could be obtained, and the ductility and energy dissipation of the joints could be analyzed. The results show that the hysteretic loops are plump, and the ductility and energy dissipation performances of the joints are good. Based on the experimental results, ABAQUS was employed to build the 3D nonlinear finite element models for analyzing the mechanical properties of the structure. Comparisons disclose that the finite element analysis results agree with the experimental results very well. Furthermore, parametric analysis of the structure was carried out based on the theoretical analysis. The analysis parameters include the axial compression ratio, concrete strength, yield strength of square steel tube and key parameters of damper. The results show that with the increases of the concrete strength, yield strength of square steel tube and damping coefficient, the load-bearing capacity of the structure may increase; with the increase of axial compression ratio and concrete strength, the load-bearing capacity may increase, but the ductility may gradually decrease; with the increase of yield strength of square steel tube, the ductility of the specimens may increase; with the increase of damping exponent, the load-bearing capacity and ductility of the specimens exhibit the characteristics of increasing first and decreasing later, indicating that to improve the seismic performances of beam-column joint in traditional-style buildings with viscous damper, the performance parameters of the viscous damper shall be appropriately selected.

关 键 词：传统风格建筑 黏滞阻尼器 梁-柱节点 动力循环加载 参数分析 

分 类 号：TU375[建筑科学—结构工程]