摘要
An explicit finite difference method is performed to evaluate the significance of topography effects on the seismic response of viscoelastic sites.The real accelerograms and bell-shape impulse wavelets,slope angle of cliff and angle of incidence on the spectrum property of the incoming waves are all discussed in detail.The conclusions show that the presence of topographic factors and the direction of the incident waves not only significantly affect the peak ground acceleration of a site,but also affect the spectrum properties of the incoming waves,and the effect on the direction of the incident waves is especially remarkable.The study also finds that it is reasonable to analyse spectrum properties with the input of impulse wavelets in the finite element simulation of wave motion.
An explicit finite difference method is performed to evaluate the significance of topography effects on the seismic response of viscoelastic sites. The real accelerograms and bell-shape impulse wavelets, slope angle of cliff and angle of incidence on the spectrum property of the incoming waves are all discussed in detail. The conclusions show that the presence of topographic factors and the direction of the incident waves not only significantly affect the peak ground acceleration of a site, but also affect the spectrum properties of the incoming waves, and the effect on the direction of the incident waves is especially remarkable. The study also finds that it is reasonable to analyse spectrum properties with the input of impulse wavelets in the finite element simulation of wave motion.
基金
This project was supported by the Research Fund for the Basic Operation of National Social Welfare Institutions (J2207831)
the National Science Supporting Program(2006BAC13B01)
