钢管混凝土拱桥模型的模态测试方法与应用  

Modal test method of concrete-filled steel tubular arch bridge model and its application

作　　者：郝向炜[1] 赵继文 孙航[3] 

机构地区：[1]东北林业大学土木工程学院,黑龙江哈尔滨150040 [2]中交一航局第二工程有限公司,山东青岛266000 [3]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《兰州理工大学学报》2013年第1期120-124,共5页Journal of Lanzhou University of Technology

摘　　要：以结构模态参数为基础的结构动力分析是桥梁结构动力分析的关键问题之一.首先建立某一钢管混凝土拱桥的有限元模型,并进行动力分析.其次对该模型进行模态试验,采用结合环境激励技术的特征系统实现算法(ERA法)识别该结构的模态参数,即识别得到该结构的前6阶频率和振型.最后通过比较测试结果与有限元计算结果可知,对此类复杂结构作进一步的有限元模型修正是必要的.Structural dynamic analysis which takes the structural modal parameter as its basis is one of key problems of dynamic analysis of bridge structure.Firstly,a finite element model was set up for a concrete-filled steel tubular arch bridge,its dynamic analysis was carried out.Then a modal test was conducted and the first six order modes and frequencies of this structure were identified by using Eigen-system Realization Algorithm（ERA） combined with Natural Excitation Technique（NEXT）.Finally it was known from the comparison of test result to the result of finite element computation that further finite element model updating would be necessary for this kind of complex structure.

关 键 词：钢管混凝土拱桥 模态试验 动力特性 有限元模型 

分 类 号：TU311.1[建筑科学—结构工程]