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    孫建春，張照華，高  波
    (西南交通大學(xué)土木工程學(xué)院，成都 610031)

[摘要] 在高烈度地震帶，地下工程洞口段有可能遭受嚴(yán)重震害，采用FLAC3D和ANSYS軟件，結(jié)合西部抗震項目，從土-結(jié)構(gòu)相互作用模型出發(fā)，運用數(shù)值分析方法對隧道洞口段進(jìn)行三維模擬，并對模擬結(jié)果進(jìn)行分析總結(jié)，提出隧道抗震設(shè)計中應(yīng)注意的幾個事項及建議。
[關(guān)鍵詞] 隧道；洞口；抗震；FLAC3D

    Study for seismic responses of underground structure entrance under earthquake
    Sun Jianchun, Zhang Zhaohua, Gao Bo
    ( School of Civil Engineering, Southwest Jiaotong University, Chengdu 61003 1, China)

Abstract: In high earthquake intensity area, the entrance of tunnel may be fall into nun for the seismic motion. Based on soil-structure interaction model and the west project of shock absorption, the FLAC3D and ANSYS softwares and numerical analysis method were adopted to compute the tunnel entrance. The results obtained were discussed and some measures and advises for design were presented.
Keywords: tunnel; the entrance of tunnel; shock absorption; FLAC3D