拓宽方式对拼接加宽桥梁动力性能的影响分析  

Analysis of Impact of Widening Modes on Dynamic Performance of Widened Bridge

作　　者：赵宝俊[1,2] 谢路 朱郭瑞 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]陕西省交通建设集团公司,陕西西安710075

出　　处：《筑路机械与施工机械化》2015年第6期88-91,共4页Road Machinery & Construction Mechanization

基　　金：国家自然科学基金项目(51308055)

摘　　要：为了研究不同拓宽方式对拼接加宽桥梁动力性能的影响,利用模态分析的特征方程、子空间迭代法和ANSYS中的模态分析方法对旧桥铰链拓宽和刚接拓宽的固有频率、振动、结构刚度进行分析,研究不同拓宽方式下桥梁模态参数和动力响应。结果表明,旧桥模型与新桥模型的动力性能相似,都具有良好的协同工作性能;不同拓宽方式对桥梁的动力性能影响几乎一致;桥梁拓宽改善了旧桥动力性能;刚接拓宽对旧桥动力性能改善更加有利。In order to study the impact of widening modes on dynamic performance of widened bridge, characteristic equation, subspaee iteration method and modal analysis were applied to analyze the inherent frequency, vibration and structure strength of the existent bridge as well as the hinge widening and rigid connection widening parts. The results show that both the old and new bridge models show coordinated working performance, and the impacts of different widening modes on dynamic performance have no noticeable difference. Bridge widening improves the dynamic performance of existent bridges, which is more evident with rigid connection widening.

关 键 词：桥梁拓宽 拓宽方式 动力性能 影响 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]