基于Bouc-Wen本构对桥墩滞回参数识别的研究  

Study on hysteretic parameters identification of bridge piers based on Bouc-Wen constitutive model

作　　者：王琪 田石柱[1,3] 贾红星[3] WANG Qi;TIAN Shizhu;JIA Hongxing(School of Civil Engineering,SUST,Suzhou 215011,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Nanjing Municipal Administration Department,Nanjing 210009,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215011 [2]南京市市政管理处,江苏南京210009 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《苏州科技大学学报（工程技术版）》2018年第1期15-20,共6页Journal of Suzhou University of Science and Technology（Engineering and Technology Edition）

基　　金：国家自然科学基金面上项目(51778394)

摘　　要：为更加深入地研究桥墩在地震作用下的滞回特性,以某四跨钢筋混凝土连续梁桥为研究主体,选用3#桥墩做低周往复数值模拟,基于Bouc-Wen本构来识别其滞回参数;再按照1:2.5的比例浇筑混凝土桥墩模型,对桥墩模型做低周往复试验,并得到该桥墩在往复荷载下的力-位移曲线,识别此曲线的形状控制等参数,将此参数带入Opensees数值模拟平台,输入实际地震作用,得出数值模拟的力-位移曲线与桥墩模型在相同地震作用下的物理试验曲线进行对比。研究结果显示,数值模拟曲线的Bouc-Wen模型参数识别效果较好;试验曲线的识别参数带入Opensees数值平台后得到的曲线与桥墩在相同地震作用下的物理试验结果相吻合。为今后相关的物理试验中减少试件浇筑提供了参考。For more in-depth study on hysteretic characteristics of bridge piers under the seismic action,a fourspan reinforced concrete continuous beam bridge is used as the research subject,and the 3#pier is used to sim鄄ulate the low-cycle reciprocal values.The hysteresis parameters are identified based on Bouc-Wen constitutive.Based on the test platform,the key laboratory of Jiangsu Province,the concrete pier model was made according to the ratio of 1:2.5,and the pier model was subjected to the low cycle reciprocating test.The force-displacement curve of the pier under the reciprocating load and the shape control parameters were obtained.The parameters are taken into the Opensees numerical simulation platform,and the actual seismic action is input.The force-dis鄄placement curve of the numerical simulation is compared with the physical test curve under the same earthquake.The results show that the parameters of the Bouc-Wen model of the numerical simulation curve are good.The re鄄sults of the experimental parameters are taken into the Opensees numerical platform and the curves are consistent with the physical test results of the pier under the same earthquake,which can provide the possibility of reducing the test pieces in future physical tests.

关 键 词：滞回曲线 Bouc-Wen本构 参数识别 OPENSEES 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]