基于响应面的波形钢腹板PC组合梁桥有限元模型修正方法的试验研究  

Experimental research on FE model updating of PC composite box girder bridge with corrugated steel webs based on response surface method

作　　者：康志锐 张巍[1] 宋帅 张进标 KANG Zhirui;ZHANG Wei;SONG Shuai;ZHANG Jinbiao(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学土木工程学院,山西太原030024

出　　处：《铁道科学与工程学报》2020年第5期1186-1192,共7页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(51808376);中国博士后科学基金资助项目(2019M651076)。

摘　　要：为探讨波形钢腹板PC组合箱梁桥模型修正方法应用于实桥结构运营安全性能评估的有效性,开展实桥荷载试验,并基于响应面法,以设计参数为自变量,利用竖向前3阶自振频率构造目标函数进行迭代优化,从而实现对有限元模型的修正,使修正后模型的计算结果和试验实测值的偏差在合理范围内。而后按照静载试验的加载工况对有限元模型加载,通过对比挠度计算值与试验值,验证其精确性。研究结果表明:修正后的模型能够真实反映桥梁的实际运营状态,可以作为该桥的基准有限元模型用于桥梁运营安全性能评估。To explore the effectiveness of FE model updating method in safety performance assessment of PC composite box girder bridge with corrugated steel webs, the dynamic and static load test of bridge was carried out. On base of the response surface method, taking the design parameters as independent variables, the first three natural frequencies was used to construct the objective function for iterative optimization. So that the deviation between calculation results of FE model and values of load test is within a reasonable range. Then, according to the loading condition of the static load test, the finite element model was loaded, and the accuracy was verified by comparing the calculated value of the deflection with the experimental value. The results show that the modified model can truly reflect the actual operational status of the bridge, and can be used as the baseline FE model of the bridge for the safety performance evaluation of bridge operations.

关 键 词：组合箱梁桥 波形钢腹板 响应面法 动静载试验 模型修正 

分 类 号：U446[建筑科学—桥梁与隧道工程]