大型预应力梁式渡槽动力特性分析

渡槽结构的动力特性分析是渡槽结构地震响应分析及抗震设计的基础.采用有限元分析软件ANSYS对滏阳河渡槽进行动力特性分析,水体和槽壁之间的相互作用采用附加质量法来处理,计算分析矩形渡槽在不同水深时的自振频率和主振型.计算结果表明:水体对渡槽结构主振型的影响可以忽略不计,但是对渡槽结构自振频率的影响很大;渡槽的频率随水深的加深而减小.研究结果可以为滏阳河渡槽的抗震设计及其防护提供依据.

Dynamic Characteristic Analysis of Large Scale Prestressed Beam Aqueduct

Dynamic characteristic analysis of aqueduct structure is the foundation of the seismic response analysis and seismic design.In this paper,the finite element analysis software ANSYS is adopted to calculate and analyze the dynamic characteristic of Fuyang River Aqueduct structure. The added mass method is used to deal with interaction between water and aqueduct wall,and the natural vibration frequency and main vibration mode of the rectangular aqueduct in different water depth are calculated and analyzed. The calculation results show that water body has a small effect on the vibration mode of aqueduct structure,but greater on the natural vibration frequency of aqueduct structure; the natural vibration frequency of aqueduct structure decreases with the increase of water depth. The research results provide the basis for the seismic design and protection of Fuyang River Aqueduct.