基于响应面法的连续箱梁桥模型修正

Continuous Box Girder Bridge Model Correction Based on Response Surface Method

摘要: 针对基于响应面法的桥梁有限元模型修正方法进行研究，采用Midas软件，根据图纸建立简直转连续箱梁桥的初始有限元模型，将10、22、34、46、59单元的弹性模量降低40%，以单元刚度折减后的前五阶模态为目标响应，采用响应面法进行有限元模型修正。计算结果表明：基于响应面法的模型修正大幅提高计算效率，修正后的模态误差在0.3%以内，具有求解效率高，精度高的优点。

Abstract: In order to study the finite element model correction method of the bridge based on the response surface method, the initial finite element model of the simply rotating continuous box girder bridge was established according to the drawings by Midas software, and the elastic modulus of elements 10, 22, 34, 46 and 59 was reduced by 40%, and the first five modes after the element stiffness reduction were used as the target response, and the response surface method was used to modify the finite element model. The results show that the model correction based on the response surface method greatly improves the computational efficiency, and the modified modal error is within 0.3%, which has the advantages of high solution efficiency and high accuracy.