土动力学参数对设计反应谱的影响

Effect of soil dynamic parameters on design response spectrum

本文选取3种单一均质土层剖面,在3条强度不同的地震动输入下,运用一维土层地震反应分析技术,研究土的动剪切模量比、阻尼比及其对设计反应谱的影响。为了使结果能够直观地反映抗震设防所需要的地震动参数的变化,本文分析了这两个参数在一定范围内变化时,对设计反应谱的特征周期Tg和平台高度αm ax的影响,得到了一些有价值的结论。

Using the one-dimensional equivalent linear method, the authors study the soil response to the ground motions with different amplitudes. The effects of dynamic shear modulus ratio and damping ratio of soil on the characteristic periods and flat heights of design response spectra are analyses. Some valuable conclusions for earthguake engineering are drawn.