独塔斜拉桥在不同边界条件下的动力特性分析

以独塔斜拉桥仙桃汉江大桥为例,分析比较了独塔斜拉桥在5种不同的边界条件下动力特性的异同,讨论了不同的结构型式对独塔斜拉桥动力特性的影响。结果表明:对于独塔斜拉桥来说,边跨设置辅助墩可以大幅提高结构的整体刚度;辅助墩的个数对于结构振型和频率影响不大。研究结果可为此类桥梁的结构选型、抗震设计提供有益参考。

Dynamic Characteristics Analysis of Cable-Stayed Bridges with Single Tower Under Various Boundary Conditions

Taking a cable-stayed bridge with single tower named Xiantao Han River Bridge as an example,the dynamic characteristics similarities and differences of cable-stayed bridges with single tower under five different boundary conditions are analyzed.The influences of different structure types on dynamic characteristics of cable-stayed bridges with single tower are discussed.The results show that the arrangements of the auxiliary piers in the side spans can increase the structure rigidity greatly,but the number of auxiliary piers does little effect on structure modes and frequencies.And the results can give good reference for the same type bridges in structure type choosing and seismic design.