CAJ | 학술논문

本文重点关注对盾构隧道的纵向地震响应分析方法的研究,提出了一种简化的动力有限元分析方法.这种方法采纳了响应位移法的一些基本思想,采用和响应位移法一样的环梁和土弹簧模型,但采用动力有限元法来评估地基地震动,而摒弃了响应位移法中采用的地基振动为谐波形式的假定.与响应位移法相比,简化动力有限元法能够提高地基震动的计算精度,从而提高结构响应的计算精度;而与三维连续模型相比,新方法的计算规模小得多,从而能够大幅提高计算效率.然后,本文分别采用相应位移法和新提出的简化动力有限元法,对武汉长江隧道盾构段隧道进行了纵向地震响应分析,并对这2种方法计算结果的差异进行了分析.
본문중점관주대순구수도적종향지진향응분석방법적연구,제출료일충간화적동력유한원분석방법.저충방법채납료향응위이법적일사기본사상,채용화향응위이법일양적배량화토탄황모형,단채용동력유한원법래평고지기지진동,이병기료향응위이법중채용적지기진동위해파형식적가정.여향응위이법상비,간화동력유한원법능구제고지기진동적계산정도,종이제고결구향응적계산정도;이여삼유련속모형상비,신방법적계산규모소득다,종이능구대폭제고계산효솔.연후,본문분별채용상응위이법화신제출적간화동력유한원법,대무한장강수도순구단수도진행료종향지진향응분석,병대저2충방법계산결과적차이진행료분석.
This article focuses on the approaches to the longitudinal seismic response analysis of shield tunnels,and presents a new simplified dynamic finite element method,which accepts some basic ideas of response displacement method.This method uses the same structure model and spring model as response displacement method,but uses the finite element method to estimate the responses of the ground in time series instead of the supposition of harmonic motion.This method could give more reasonable results compared with the response displacement method,because it could improve the precision of the evaluation of ground deformations.At the same time,this method has much smaller scale of calculation compared with the 3-D continuum model.Subsequently,both the response displacement method and the new simplified dynamic finite element method are applied to calculate the seimic responses of Wuhan Changjiang River Tunnel,with the emphasis on the difference of the results given by different methods.