A Study on the Influencing Factors on Ground
Motion in a Valley Site1
LI Ping;BO Jingshan;XIAO Ruijie;ZHANG Yudong
【期刊名称】《中国地震研究（英文版）》 【年(卷),期】2019(033)001
【摘要】A trapezoid valley site is chosen as a research site, and according to numerical models based on orthogonal design, the factors influencing ground motion in the valley site are studied with two-dimensional finite difference method. The influencing factors are ranked, and then the calculation results are verified by ground motion analysis. The conclusions are as follows: there are four factors that have important effects on ground motion of trapezoid valley sites, but the effects are different as the location of sites changes, the influencing factors rank differently with different site locations;The ranking of the influencing factors is the same for all the sites located within a distance of 40m from the valley's side, among them, the most effective one is the valley slope angle ranks,followed by depth-to-width ratio, overburden thickness, at last the input ground motion intensity. The impact of the factors on surface ground motion is roughly the same in the valley sites within a certain distance to the valley side, and the geometric parameters of the valley terrain play a greater part in influencing ground motion. With the increase of distance away from the valley's
A Study on the Influencing Factors on Ground Motion in a Valley Site1
