基于动力的石拱桥有限元模型修正  

Dynamic based finite element model updating of stone arch bridge

作　　者：石明兰[1] 左小刚[2] 夏樟华[2] 

机构地区：[1]福州大学建筑学院,福建福州350108 [2]福州大学土木工程学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2009年第4期573-581,共9页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省高等学校新世纪优秀人才支持计划资助项目(TW2006-29)

摘　　要：利用大型通用软件ANSYS,以国道319线苏家坡桥为例阐述基于动力的加固前后石拱桥有限元模型建立及模型修正的过程.首先介绍加固前后苏家坡桥的环境振动试验与模态参数识别,然后介绍加固前的石拱桥有限元建模及基于动力的模型修正过程,最后介绍加固后该桥的有限元模型修正.结果表明,加固前后的有限元模型计算和实测动力特性能够吻合良好,所建立的有限元模型可以用于桥梁的静动力计算.Using commercial software ANSYS, the process of finite element modeling and model updating of stone arch bridge based on dynamic behaviors as an example Sujiapo bridge in No. 319 national line before and after strengthening was carried out. Firsdy, the ambient vibration field - testing and modal parameters identification were conducted, then the process of finite element modeling and model updating of Sujiapo arch bridge before strengthening was introduced, finally, the finite element （FE） model after strengthening was constructed and updated. The result reveals that the dynamic characteristics from FE model are coincide with the results from testing before and after strengthening, and the FE model can be used for further stadc and dynamic calculation.

关 键 词：石拱桥 有限元模型 振动试验 模型修正 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]