| 双洞八车道大断面隧道地震动力响应数值分析 |
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| 引用本文： | 施有志,车爱兰,周先齐,尚武孝.双洞八车道大断面隧道地震动力响应数值分析[J].西北地震学报,2016,38(4):510-518. |
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| 作者姓名： | 施有志 车爱兰 周先齐 尚武孝 |
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| 作者单位： | 厦门理工学院土木工程与建筑学院, 福建 厦门 361021;上海交通大学船舶海洋与建筑工程学院, 上海 200240,上海交通大学船舶海洋与建筑工程学院, 上海 200240,厦门理工学院土木工程与建筑学院, 福建 厦门 361021,中铁一局集团有限公司, 陕西 西安 710054 |
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| 基金项目： | 福建省住房和城乡建设厅科学技术项目（2015-K-38）；福建省自然科学基金（2014J05066）；福建省自然科学基金资助项目（2016J01271）；福建省住房和城乡建设厅科学技术项目（2016-K-26） |
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| 摘 要： | 为研究双洞八车道超大断面隧道在地震力作用下的动力响应特征,以平潭综合实验区牛寨山隧道为工程背景,建立双洞八车道隧道的三维有限元数值计算模型。采用时程分析方法,在模型底部输入水平向地震动荷载,计算隧道结构在地震动荷载作用下的响应,包括位移、加速度及应力的变化。结果表明:最大水平和竖向位移出现在拱顶处,南线浅埋隧道整体呈剪切响应;隧道最大水平加速度出现在南线隧道拱顶偏左处,最大垂直加速度出现在南线隧道拱顶偏右处,南线隧道洞口由于浅埋,关键部位响应差较北线要大;南线的右拱肩埋深最浅,该部位拉应力最大,而北线拱顶的拉应力区最大,拱脚也出现明显的拉或压应力。建议在隧道洞口段的拱顶、拱脚及埋深最浅的部位应加强抗震设防。
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| 关 键 词： | 八车道 隧道 地震 动力响应 数值分析 |
| 收稿时间： | 2015/9/24 0:00:00 |
Numerical Seismic Dynamic Response Analysis of Double-hole Eight-lane Large Section Tunnel |
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| SHI You-zhi,CHE Ai-lan,ZHOU Xian-qi and SHANG Wu-xiao.Numerical Seismic Dynamic Response Analysis of Double-hole Eight-lane Large Section Tunnel[J].Northwestern Seismological Journal,2016,38(4):510-518. |
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| Authors: | SHI You-zhi CHE Ai-lan ZHOU Xian-qi and SHANG Wu-xiao |
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| Institution: | School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen 361021, Fujian, China;School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China,School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China,School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen 361021, Fujian, China and China Railway First Group Co. Ltd., Xi''an 710054, Shaanxi, China |
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| Abstract: | To study the dynamic response characteristics under earthquake action of a double-hole eight-lane tunnel with a super large cross-section,this study conducts investigations of the Niuzhaishan Tunnel at the Pingtan Comprehensive Test Region and establishes a three-dimensional finite element numerical calculation model for double-hole eight-lane tunnels.By adopting a time-history analysis method,the horizontal seismic load is input at the bottom of the model to calculate responses of the tunnel''s structure under seismic dynamic loading,including variations of displacement,acceleration,and stress.Results show that the maximum horizontal and vertical displacement occurred at the vault,and the shallowly buried tunnel of south line generally presented shear loading.In addition,peak acceleration of the tunnel occurred at the south line tunnel vault to the left and maximum vertical acceleration occurred at the south line tunnel vault to the right.As the south line tunnel portal was buried at a shallow depth,the responses of key parts were greater than those of the north line.Furthermore,the maximum tensile of the south line tunnel occurred mainly in areas of the right spandrel,left arch foot,and bottom of tunnel,and maximum compressive stress mainly occurred at the left spandrel and right arch foot; whereas the maximum tensile of the north line tunnel mainly occurred at the vault and bottom of the tunnel.However,there was a greater value for the maximum tensile of the north line tunnel at the left spandrel than at other positions in the same section.It is thus considered necessary to strengthen seismic fortification at the vault,arch springing,and at the point of minimum burial depth of the tunnel portal. |
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| Keywords: | eight-lane tunnel earthquake dynamic response numerical analysis |
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