题目

英语翻译
Abstract:Previous papers have reported on the performance of a recently developed nonlinear ground response analysis code,SPECTRA,
with reference to the prediction of the free-field response at a Large-Scale Seismic Test site in Lotung,Taiwan during the M6.5
earthquake of May 20,1986.Two more major earthquakes of different characteristics shook this test site later that same year,a M6.2
earthquake that occurred on July 30 and a M7.0 earthquake that occurred on November 15.The present article analyzes the free-field
responses recorded by a downhole array from these latter two events using the code SPECTRA and a widely used equivalent linear
analysis code SHAKE.The studies focus on the relative accuracy and sensitivity of the two codes with respect to the variations of the input
material parameters,using time histories,acceleration response spectra,Fourier acceleration amplitude spectra,and Arias intensities as
criteria for the comparison.The two code

提问时间：2020-05-28

答案

摘要：上篇论文报告了最近开发的非线性反应分析的地面代码,光谱性能,
参照在大规模地震试验在罗东,台湾网站的自由场响应预测在M6.5
地震5月20日,1986年.两个以上不同特性的大地震震撼这个试验场同年晚些时候,一个6.2级
地震发生在7月30日7.0级地震和11月15日发生.本文章分析了自由场
反应,从这些记录后两个事件井下使用代码谱和数组一种广泛使用的等效线性
分析代码震动.这些研究侧重于相对的准确性和灵敏度方面两个代码到输入的变化
材料参数,采用时程,加速度反应谱,傅立叶加速度幅值谱,和阿里亚斯强度为
标准的比较.这两个代码抓住了历史的一般加速度波形好,但人们普遍
两个代码倾向〜特别震动!以underpredict阿里亚斯的地震强度.
分类号：10.1061 /〜ASCE的1090-0241〜2002 128:1〜54!
CE数据库关键词：应力分析,边界面,有限元法;地震动;可塑性