连续箱梁高架桥横向动力分析

LATERAL DYNAMIC ANALYSIS OF CONTINUOUS BOX GIRDER VIADUCT

本文提出了可以考虑箱形梁弯曲、扭转、畸变多种因素的梁－墩系统横向振动的动力分析模型。将桥墩离散为空间梁单元，连续箱形梁离散为箱梁单元，导出了它们的单元刚度矩阵和质量矩阵．文中采用子空间迭代法计算了大跨度连续箱梁高架桥的横向自振频率及振型，最后对计算结果进行了讨论。

In this paper,the lateral vibration dynamic analysis model of continuous box girder viaduct is presented in which the bending,torsion and distortion of box girder can be considered.Bridge pier is idealized as an assemblage of space beam elements.Continuous box is idealized as an assemblage of box beam elements.The element stiffness matrices and mass matrices are derived.Lateral vibration natural frequency and mode of long span continuous box girder viaduct are calculated by use of the subspace iteration method.