独柱支承直线连续箱梁桥动力分析

独柱支承直线连续箱梁桥的动力特性与普通双支承连续箱梁相比发生一定改变,而桥梁结构动力特性与活载冲击系数、桥梁抗震性能有着紧密联系。通过有限元计算对比分析独柱支承直线连续箱梁桥和普通支承连续箱梁桥的动力特性差异及其对地震反应的影响。结果表明结构独柱支承连续箱梁桥冲击系数和地震反应仍可按规范和目前工程常规做法进行设计计算。

Dynamic Analysis on Continuous Box Girder Bridges Supported by Single Column

The dynamic properties of single column-supported linear continuous box girder bridges is changed compared with double column supported continuous box girder bridge,and the bridge structure dynamic characteristics is closely linked to live load impact factor and seismic performance of bridges.In this paper,the dynamic characteristics difference and response to earthguake of single column-supported linear continuous box girder bridges and the general bearing continuous box girder bridge.The results show that the current standardizes are applicable for the design and calculation of impact coefficient and earthquake response single column-supported box girder bridge are compared by FEM.