摘要
为优化预制T形柱连接,对预制柱连接进行优化,灌浆套筒用于连接角纵筋,其余纵筋绑扎搭接,设计并制作T形柱边框架梁柱节点试件。采用试验和有限元计算,研究梁柱节点在水平地震作用下破坏过程、承载力与变形、延性、刚度与耗能能力,并对轴压比参数进行计算分析。结果表明:优化后梁柱节点呈梁端受弯破坏,节点和预制柱固端未出现明显裂缝;荷载位移骨架曲线表现出较好的塑性变形能力,延性系数接近5;滞回环面积饱满,累积耗能约15 kJ,等效黏滞系数为0.04~0.24;随轴压比增加,节点受压损伤区域扩大,延性明显降低。后浇整体式T形柱边框架节点整体性良好,抗震性能较强,弹簧单元可用于竖向预制后浇界面黏结作用的简化,数值计算结果与试验表征相符。
For optimizing the connection of prefabricated T-shaped columns,sleeve grouting was used for the connection of corner longitudinal bars,and the rest of the longitudinal bars were tied and overlapped.A scaled specimen of T-shaped column exterior frame joint was designed and fabricated.Experiment and finite element analysis were used to study the failure process,bearing capacity and deformation,ductility,stiffness,and energy dissipation capacity of beam-column joints under horizontal earthquake.The axial pressure ratio parameters were calculated and analyzed.The results show that the beam-column joint was subjected to bending damage at the beam end after optimization,and no obvious cracks appeared at the joint and the fixed end of the precast column.The load-displacement skeleton curve shows a good plastic deformation ability,and the ductility coefficient is close to 5.Hysteresis loop is full,and the cumulative energy consumption reached about 15 kJ.The equivalent viscosity coefficient is between 0.04 and 0.24.With the axial compression ratio increase,the joint was damaged by compression expand,and the ductility was significantly reduced.The cast-in-situ monolithic T-shaped column exterior frame joint had a good integrity and strong seismic performance.The spring elements were used to simplify the adhesion of the vertical precast post-casting interface.The numerical calculation results are consistent with the experimental characterizations.
作者
王玲
韩政遒
付素娟
杨佩剑
WANG Ling;HAN Zheng-qiu;FU Su-juan;YANG Pei-jian(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Hebei Construction Science Academy,Shijiazhuang 050021,China)
出处
《科学技术与工程》
北大核心
2020年第27期11225-11232,共8页
Science Technology and Engineering
基金
河北省建设科技研究计划(2015-07)
河北省高等学校科学技术研究项目(QN2015143)。
关键词
后浇整体式T形柱边框架
套筒灌浆连接
节点抗震性能
有限元分析
轴压比
cast-in-situ monolithic T-shaped column exterior frame
splicing by grout-filled coupling sleeve
seismic behavior of joint
finite element analysis
axial compression ratio
