Author(s)

Qing-Qing Ma, Gang Li and Da-Wei Xie

Corresponding Author

Qing-Qing Ma

Abstract

Considering the traveling wave effect, the radiation damping of the foundation and the reflection of the seismic wave in the foundation, the equivalent input mode of the vertical incident load applied to the infinite element is obtained, and the three-dimensional infinite element finite element coupling analysis model of the structure foundation interaction is established. Three groups of impulsive earthquakes are selected and the corresponding non impulsive earthquakes are synthesized according to their response spectra. The dynamic responses of structures under impulsive and non impulsive earthquakes are compared. The results show that under the same peak acceleration, the dynamic response of the structure under the impulse earthquake is greater than that under the non impulse earthquake, and the impulse effect will amplify the dynamic response of the earthquake to the structure; and from the results of the stress and damage factors of the pipe gallery, the plastic buckling is easy to occur on the top of the pipe gallery, which is the weak link of seismic resistance. Therefore, the influence of pulse effect should be considered in the design of pipe gallery structure, and the top position of the gallery should be focused on.

Keywords

Comprehensive pipe gallery; Equivalent load; Impulse earthquake; Ground motion fitting; 3D infinite element boundary