基于响应面模型的桥梁有限元修正方法研究  

Research on Finite Element Correction Method for Bridge Based on Response Surface Model

作　　者：马超凡 张姚 Ma Chaofan;Zhang Yao(China United Engineering Corporation Limited,Hangzhou 310052,China)

机构地区：[1]中国联合工程有限公司,杭州市310052

出　　处：《北方交通》2023年第5期21-25,共5页Northern Communications

摘　　要：由于实际运营的桥梁存在不同程度的病害,建立的有限元模型往往不能准确反映桥梁实际工作状态。因此,需要基于实测的结构响应参数来修正模型,最大限度减小有限元模型计算值与实际运营参数之间的差异。结合统计学理论以及模型修正技术中的响应面模型修正方法,通过拟合,得到桥梁结构响应与设计参数之间的显示函数表达式,从而用响应面模型取代初始有限元模型,可在结构的响应面模型内求得最优解。计算结果表明,修正后的有限元计算误差显著降低,满足工程精度要求。Due to the varying degrees of diseases in the actual operation of bridges,the established finite element model often cannot accurately reflect the actual working state of the bridge.Therefore,it is necessary to correct the model based on the measured structural response parameters to minimize the difference between the calculated values of the finite element model and the actual operating parameters.In combination with the statistical theory and the correction method for the response surface model of the model correction technology,the explicit function expression between the bridge structure response and the design parameters is obtained by fitting,so that the initial finite element model can be replaced by the response surface model,and the optimal solution can be obtained in the response surface model of the structure.The calculation results show that the finite element calculation error after the correction is significantly reduced and meets the engineering precision requirements.

关 键 词：桥梁结构 有限元模型 模型修正 响应面 动力响应 静力响应 

分 类 号：U447[建筑科学—桥梁与隧道工程]