摘要
针对刚架拱桥出现的病害,建立典型混凝土刚架拱桥空间结构有限元模型,分析其动力特性和结构损伤之间的关系,重点研究横向联系体系对动力特性的影响。进行基于环境激励的刚架拱桥模态试验和振动响应测试,并与有限元分析结果进行了比较。分析结果表明,刚架拱桥桥面1阶扭转振型的自振频率对横向联系体系的约束作用非常敏感,可作为反映刚架拱桥结构损伤的特征参数。
In the light of the deteriorations of concrete rigid-frame arch bridges, a spatial structure finite element model was established for the typical bridge of such type to analyze the relations between dynamic properties and structural damages of the bridge, in which particular efforts were made to study the influences of lateral connection system on the dynamic properties. The modal tests based on ambient vibration for the arch bridge and measurement of vibration response were carried out and compared to the results of the finite element analysis. The results of analysis indicate that the natural vibration frequency of the 1st order torsional vibration mode of deck of the rigid-frame arch bridge is very sensitive to the restrained action of the lateral connection system and can represent the characteristic parameters of structural damages of the type of the bridge.
出处
《桥梁建设》
EI
CSCD
北大核心
2007年第6期75-77,81,共4页
Bridge Construction
基金
国家自然科学基金重点项目(50538020)
关键词
刚架拱桥
钢筋混凝土结构
动力特性
模态试验
损伤识别
rigid-frame arch bridge
reinforced concrete structure
dynamic property
modal test
damage identification
