淺埋地下結(jié)構(gòu)的三維地震響應(yīng)分析
鄭小瓊1 ，范書(shū)立2 ，李偉東3
- 摘 要
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（1 廣東技術(shù)師范學(xué)院天河學(xué)院，廣州 510540； 2 大連理工大學(xué)，大連 116024；3中南電力設(shè)計(jì)院，武漢 430071）[摘要] 基于ABAQUS軟件建立了地鐵車(chē)站的三維動(dòng)力分析模型，為了消除截?cái)噙吔绲挠绊?邊界采用無(wú)限元模擬。土體有限域采用服從摩爾-庫(kù)倫屈服準(zhǔn)則的彈塑性本構(gòu)模型。計(jì)算結(jié)果表明:ABAQUS中的無(wú)限元在處理半無(wú)限域的動(dòng)力問(wèn)題是可行的，精度滿足工程要求；結(jié)構(gòu)受力最大部位為車(chē)站縱向跨中橫截面,因此,車(chē)站結(jié)構(gòu)按平面問(wèn)題計(jì)算是偏于安全的；地震荷載引起柱端彎矩增幅最大,其次是側(cè)墻,對(duì)板影響最?。?a name="OLE_LINK8">不同地震波作用下車(chē)站的位移響應(yīng)時(shí)程和加速度響應(yīng)時(shí)程具有顯著差別，初步給出了一些影響規(guī)律。[關(guān)鍵字] 地鐵車(chē)站結(jié)構(gòu)；三維計(jì)算模型；地震響應(yīng)中圖分類(lèi)號(hào)： TU924 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2013)S2-0076-05作者簡(jiǎn)介：作者簡(jiǎn)介：鄭小瓊，碩士，講師，研究方向?yàn)榈叵陆Y(jié)構(gòu)抗震，E-mail:zhengpingyi1987@163.com。3D seismic response analysis of Shallow underground structureZheng Xiaoqiong1， Fan Shuli2，LiWeidong3(1 Tanhe College of Guangdong Polytechnic Normal University, Guangzhou 510540, China; 2 Dalian University of Technology, Dalian 116024, China; 3 Central Southern China Electric Power Design Institute, Wuhan 430071, China)Abstract: In this paper, a 3-D numerical calculation model of subway station structure is established by ABAQUS meanwhile infinite elements is used to simulate the boundary to eliminate the influence of the intercept boundary. In this model, the M-C model is proposed to describe non-linear dynamic characteristic of the soil. It is shown from the calculation results that：it is feasible and can meet the accuracy requirement that the infinite element deals with the dynamic analysis of semi-infinite foundation in ABAQUS;the maximum values of inner forces and deformation both appeared in the cross section, which is in the middle of structure along the longitudinal direction．Therefore, it tend to safe to design the structure according to the results obtained by plain strain assumption；seismic load has maximum effect on the moment of column．second is sidewall and the last is backplane．the ending moment of the column caused by seismic load has the largest increase. Sidewalls are second and the backplane is at the bottom of the table;there is a significant difference in the time history of earthquake acceleration and displacement under different earthquakes. The rules of variation are generalized in this paper.Keywords: subway station structure; 3D calculation model; seismic response
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