温度影响下基于布谷鸟算法的钢–混组合结构桥梁有限元模型修正  

Finite Element Model Updating of Steel-concrete Composite Bridge Under Temperature Effects Based on Cuckoo Search

作　　者：黄民水 程劭熙 顾箭峰 卢海林 HUANG Min-shui;CHENG Shao-xi;GU Jian-feng;LU Hai-lin(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430073,China)

机构地区：[1]武汉工程大学土木工程与建筑学院,湖北武汉430073

出　　处：《土木工程与管理学报》2018年第6期107-110,130,共5页Journal of Civil Engineering and Management

基　　金：国家留学基金委资助项目(201508420074);国家自然科学基金(51378404)

摘　　要：结构在日常服役的过程中反复承受变化的温度荷载,温度变化会导致材料弹性模量的变化,进而影响结构的刚度,相应结构的动力特性也会发生变化。本文在建立有限元模型时将温度作为材料参数函数的一个变量,并基于Matlab建立了I-40钢混组合结构桥梁有限元模型并计算其自振特性。同时利用布谷鸟搜索算法(Cuckoo Search)在考虑温度对结构材料参数的影响下对有限元模型进行了修正。修正后的结构模态参数与实验数据吻合良好,最大频率误差小于2%,模态置信准则MAC值均在95%以上,修正后的有限元模型可作为后续结构损伤识别的基准模型。Structures will withstand a series of repeated temperature loadings during the normal service period and the change of temperature will lead to variations of material elasticity modulus,as a consequence,the structure dynamic response is changed accordingly.In this paper,temperature is considered as a variable in material parameter,and the finite element model of I-40 steel-concrete composite bridge is established based on Matlab and its natural vibration characteristics is acquired.Then Cuckoo Search is adopted to update the model considering temperature effects.The updated modal parameters agree with the experimental data very well.The maximum error of frequencies is less than 2%and the value of MAC is above 0.95,which means the updated finite element model can be used as the baseline model for further damage identification.

关 键 词：温度影响 模型修正 组合结构桥梁 布谷鸟算法 

分 类 号：U442[建筑科学—桥梁与隧道工程]