摘要
本文使用显式有限元法分析了三个二维不规则地形对地震波的放大效应,提出在城市小区划工作中,用在一维分析得到的设计谱上乘以二维放大系数(1+α_L)的方法考虑二维场地局部放大影响。为工程使用方便,文中建议对不同超越概率水准的入射波得到的α_L值取平均,并分等级给出简单适用的二维修正系数α_L。
An explicit finite element method is engaged in the analysis of seismic amplifying effects for three two-dimensional irregular topographic sites. The results showed that we can estimate the two-dimensional amplifying effects by simply multiplying the one-dimensional design spectra by the two-dimensiona l amplifying factors (1 + aL). For convenience, it is recommended that a suitable two-dimensional modified factor aL can be obtained by averaging the two-dimensional modified factors for the incident waves under the levels of different exceedance probabilities.
出处
《地震工程与工程振动》
CSCD
北大核心
1991年第4期19-27,共9页
Earthquake Engineering and Engineering Dynamics
基金
自然科学基金
