软土地铁车站结构形式对抗震性能影响的研究
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摘要
为研究地铁车站结构的地震反应特性,结合上海某地铁车站的抗震性能分析,采用有限差分程序FLAC对车站的几种结构形式进行了数值模拟.研究结果表明:保持地铁车站截面的对称性对结构的抗震有利;当结构截面不能保持对称时,在截面形式突变的位置设置沉降缝,能够提高结构的抗震性能;车站与周边开发部位连接处侧墙的开孔尺寸对开孔处柱子及开孔下方车站连续墙内力影响显著.
In order to study the structure of complicated metro station seismic response features,combined with the seismic performance analysis of Shanghai Jiangwan metro station on the 10th line,several structural form is simulated by FLAC.The results show that when the cross-section form is symmetrical,the aseismatic ability of the metro station can be improved;when not,the aseismatic ability of the structure can be improved too if settlement joint is installed in the section of mutation;for the narrow subway stations,when the structrue is divided into several segments at a certain distance along the longitudinal seam seismic settings,the internal force can be reduced effectively in the metro station under seismic loading forces,and the aseismatic ability of subway station can be improved;the effect of the size of the hole in juncture is remarkable on the pillar in the hole and the continuous wall.
In order to study the structure of complicated metro station seismic response features,combined with the seismic performance analysis of Shanghai Jiangwan metro station on the 10th line,several structural form is simulated by FLAC.The results show that when the cross-section form is symmetrical,the aseismatic ability of the metro station can be improved;when not,the aseismatic ability of the structure can be improved too if settlement joint is installed in the section of mutation;for the narrow subway stations,when the structrue is divided into several segments at a certain distance along the longitudinal seam seismic settings,the internal force can be reduced effectively in the metro station under seismic loading forces,and the aseismatic ability of subway station can be improved;the effect of the size of the hole in juncture is remarkable on the pillar in the hole and the continuous wall.
引文
[1]王国波.软土地铁车站结构三维地震响应计算理论与方法的研究[D].上海:同济大学土木工程学院,2007.WANG Guobo.Study on calculationtheory and method of threedi mensional seismic response of subway station structures insoft soil[D].Shanghai:Tongji University.School of CivilEngineering,2007.
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[2]杨林德,陆忠良,白廷辉,等.上海地铁车站抗震设计方法研究[R].上海:同济大学土木工程学院,2002.YANG Linde,LU Zhongliang,BAI Tinghui,et al.Research onseismic design method for metro station in Shanghai[R].Shanghai:Tongji University.School of Civil Engineering,2002.
[3]Hashash Y M A,Hook J J.Schmidt B,et al.Seismic design andanalysis of underground structure[J].Tunneling andUnderground Space Technology,2001,16:247.
[4]NamSanghyeok,Song Hawon,Byun Keunjoo,et al.Seismicanalysis of underground reinforced concrete structuresconsidering elasto-plastic interface element with thickness[J].Engineering Structures,2006,28:1122.
[5]Huo H,Bobet A,Fern偄ndez G,et al.Analytical solution for deeprectangular structures subjected to far-fieldd shear stresses[J].Tunnelling and Underground Space Technology,2006,21:613.
[6]车爱兰,岩楯敞广,葛修润.关于地铁地震响应的模型振动试验及数值分析[J].岩土力学,2006,27(8):1293.CHE Ailan,Iwatate T,GE Xiurun.Dynamic behaviors of metrostructuresubjected to strong earthquake motions using shakingtable testsand dynamic analyses[J].Rock and Soil Mechanics,2006,27(8):1 293.
[7]季倩倩.地铁车站结构振动台模型试验研究[D].上海:同济大学土木工程学院,2002.JI Qianqian.Shakingtable testing on underground metro stationstructures[D].Shanghai:Tongji University.School of CivilEngineering,2002.
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