基于OpenSees的RPC桥墩拟静力数值模拟与参数分析  

Numerical Simulation and Parameter Analysis of RPC Piers under Pseudo-static Loading Based on OpenSees

作　　者：任亮[1,2] 方志[1] 王诚[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]华东交通大学土建学院,江西南昌330013

出　　处：《铁道学报》2015年第10期92-99,共8页Journal of the China Railway Society

基　　金：国家自然科学基金(51078134);江西省自然科学基金(20114BAB206010)

摘　　要：为探讨RPC桥墩在拟静力荷载作用下的延性抗震性能,本文基于OpenSees计算平台,选取Concrete02本构关系和Steel02本构关系,结合非线性梁柱单元和零长度单元,建立考虑墩底纵筋滑移的滞回分析模型。3个常轴力作用下的RPC桥墩水平反复加载滞回试验结果与数值模拟的对比分析表明:基于适当的参数取值,应用OpenSees中既有材料本构关系和单元类型能够较好模拟RPC桥墩的骨架曲线和滞回曲线,并能反映构件在反复加载过程中强度和刚度的退化。在此基础上运用OpenSees分析轴压比、纵筋率和水平荷载加载方向等参数对RPC桥墩延性抗震性能的影响。To discuss the seismic ductility of RPC piers under pseudo-static loading,based on the OpenSees computing platform,this paper selected Concrete02 and Steel02constitutive relations,combining Nonlinear Beam-Column Element and Zero-Length Element,and established hysteresis analysis models considering longitudinal bar slippage at the end of piers.The comparison between the numerical simulation results and the results of reversed horizontal loading hysteretic tests for three RPC piers specimens under the constant axial force showed that,based on appropriate parameter values,the application of constitutive relations of the existing materials and element types in OpenSees can accurately simulate the skeleton curves and hysteresis curves of RPC piers,and reflect the degradation of their stiffness and strength in the cycling loading process.At last,the factors effecting the seismic ductility of RPC piers were analyzed,including the axial compression ratio,the longitudinal reinforcement ratio and the horizontal loading direction angle.

关 键 词：RPC桥墩 OPENSEES 拟静力 数值模拟 参数分析 

分 类 号：TU377[建筑科学—结构工程] U443.22[建筑科学—桥梁与隧道工程]