| 高地震烈度下超大直径海底盾构隧道地震响应分析 |
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| 引用本文： | 刘继国,郭小红,程勇. 高地震烈度下超大直径海底盾构隧道地震响应分析[J]. 现代隧道技术, 2011, 48(3) |
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| 作者姓名： | 刘继国 郭小红 程勇 |
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| 作者单位： | 中交第二公路勘察设计研究院有限公司,武汉,430056 |
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| 摘 要： | 文章运用FLAC3D软件,采用动力有限元法,对高地震烈度下超大直径海底隧道地震响应进行了分析。分析结果表明:与单纯自重应力场作用下相比,地震作用会造成结构内力的增大,拱顶及拱腰为其受力薄弱部位;在重力及地震共同作用下,衬砌结构的拉应力主要出现在拱顶附近,最大拉应力超过C60混凝土的抗拉强度设计值,拱顶的衬砌管片可能出现局部脱落;衬砌结构的最大受力和位移一般发生在地震2~6 s的时间段;各关键点位置的位移、弯矩、剪力、轴力时程曲线具有相似的变化规律;隧道衬砌最大水平位移为3.6 cm,最大竖向位移为3.7 cm。
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| 关 键 词： | 高地震烈度 超大直径 海底盾构隧道 地震响应 |
Seismic Response Analysis on Super Large-diameter Undersea Shied Tunnel under High Seismic Intensity |
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| Liu Jiguo,Guo Xiaohong,Cheng Yong. Seismic Response Analysis on Super Large-diameter Undersea Shied Tunnel under High Seismic Intensity[J]. Modern Tunnelling Technology, 2011, 48(3) |
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| Authors: | Liu Jiguo Guo Xiaohong Cheng Yong |
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| Affiliation: | Liu Jiguo Guo Xiaohong Cheng Yong(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056) |
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| Abstract: | Seismic response analysis on super large-diameter undersea shied tunnel under high seismic intensity was carried out using the software FLAC3D by dynamic finite element method.Results indicated that: 1,Compared with the action of gravitational stress field,the structural internal forces will be increased by seismic action,with the crown and spandrel as the weak places;2,Under the combined action of gravity and earthquake,tensile stresses of lining mainly occured near the crown,with the max.tensile stress ex... |
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| Keywords: | High seismic intensity Super large diameter Undersea shield tunnel Seismic response analysis |
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