摘要
为研究装配式钢筋混凝土拱桥腹孔墩柱节点在地震荷载作用下的力学性能和破坏机理,通过拟静力试验和数值模拟计算,对比分析了立柱节点未加固、钢板加固两种情况下的抗震性能。设计制作8mm的钢板加固试件,采用拟静力试验得到试件的滞回曲线、等效阻尼比、初始刚度、荷载-位移骨架曲线作为衡量结构的耗能能力的指标。建立了装配式钢筋混凝土拱桥立柱钢板加固节点的有限元模型,分别从结构的强度、变形能力和能量耗散3方面对比分析抗震性能。结果表明:同一加载位移下,外包钢板加固比一般连接点的恢复力特性曲线面积峰值增大13.2%,承载力提高24.7%,变形破坏程度更低,抗震性能更好。
In order to study the mechanical properties and failure mechanism of the joints under seismic load,the seismic performance of the joints under the condition of unreinforced column joint and steel plate reinforcement is compared and analyzed by pseudo-static test and numerical simulation calculation.8 mm steel plate reinforced specimen,using pseudo-static test to obtain the hysteretic curve,equivalent damping ratio,initial stiffness,load-displacement skeleton curve,the above parameters as a measure of the energy dissipation capacity of the structure.The finite element model of steel reinforced concrete arch bridge column reinforcement joint is established,and the seismic performance is analyzed from three aspects,strength,deformation and energy.The results show that under the same load displacement,the peak area of hysteretic curve of outer steel plate is increased by 13.2%,the bearing capacity is increased by 24.7%,the degree of deformation and failure is lower,and the seismic performance is better.
作者
张琼心
杨建荣
刘志超
王建宇
ZHANG Qiongxin;YANG Jianrong;LIU Zhichao;WANG Jianyu(Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology ,Kunming 650500)
出处
《工业安全与环保》
2022年第2期57-62,共6页
Industrial Safety and Environmental Protection
关键词
立柱节点
滞回曲线
拟静力试验
钢板加固
column joint
hysteretic curve
pseudo-static test
steel plate reinforcement
