高强箍筋约束混凝土桥墩的抗震耗能分析  

Seismic Analysis of Energy Consumption on High-strength Stirrup Confined Concrete Piers

作　　者：肖潇[1] 胥奇[1] 孟琳[1] 

机构地区：[1]南华大学城市建设学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2016年第1期99-106,共8页Journal of University of South China：Science and Technology

基　　金：国家安监总局安全生产重大事故防治关键技术科技基金资助项目(hunan-0021-2015AQ);湖南省科技计划基金资助项目(2014GK3111);湖南省教育厅重点基金资助项目(15A163);衡阳市科技发展计划基金资助项目(2014KS24)

摘　　要：利用有限元软件ABAQUS对8根分别配置PC钢棒或HRB500级钢筋作箍筋的高强混凝土桥墩进行了低周反复水平荷载下的抗震性能仿真分析,研究其滞回曲线、骨架曲线、位移延性系数、累积滞回耗能、能量延性系数等的变化规律.进一步探讨轴压比、配箍种类、箍筋间距、混凝土强度等对桥墩抗震性能的影响,结果表明:模拟结果与文献试验结果吻合良好,验证了有限元模拟的正确性;PC钢棒或HRB500级钢筋作高强箍筋约束高强混凝土在低周反复水平荷载作用下的滞回曲线均较饱满,滞回环包络面积大,延性和耗能能力好,且相比之下PC钢棒的抗震性能更为优越.In this paper, a total of 8 high-strength concrete pier confined by high-strength PC stirrups or HRB500 stirrups were simulated under cyclic lateral force and a constant axial loading through the finite element software ABAQUS.The characteristic of hysteresis loop, skeleton curve, ductility coefficient, hysteretic energy dissipation, ductility coefficient of energy are observed.The axial compression ratio, reinforcement ratio, stirrup types and spacing and concrete strength on the influence law of seismic performance of bridge pier are also analyzed.The results indicate that the simulation results are in good agreement with experiment results and verify the validity of the finite element simulation. The hysteresis curve and hysteresis loop area of high-strength PC steel bar stirrup and HRBS00 reinforced high strength concrete under repeated horizontal load are both big. They also have good ductility and energy dissipation capacity. Compared with HRBS00 constraint high strength concrete, the PC steel bar confinement effect is more superior.

关 键 词：滞回耗能 高强箍筋 抗震性能 数值分析 ABAQUS 

分 类 号：TU375[建筑科学—结构工程]