| 高烈度区公路隧道横通道地震响应分析 |
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| 引用本文： | 张楠,严松宏,,刘子阳.高烈度区公路隧道横通道地震响应分析[J].世界地震工程,2019,35(3):198-203. |
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| 作者姓名： | 张楠 严松宏 刘子阳 |
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| 作者单位： | 1. 深圳市市政设计研究院有限公司, 广东 深圳 518029;2. 甘肃省道路桥梁与地下工程重点实验室, 甘肃 兰州 730070;3. 兰州交通大学 土木工程学院, 甘肃 兰州 730070;4. 甘肃省轨道交通力学应用工程实验室, 甘肃 兰州 730070 |
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| 摘 要： | 双洞隧道主隧道与横通道交接部位是隧道抗震中的薄弱位置，以穿越高烈度区隧道为背景，采用MIDAS GTS-NX有限元分析软件，对在汶川地震动作用下的公路隧道横通道进行地震响应分析。在X方向和Y方向地震动荷载的共同作用下，通过对围岩和衬砌的计算结果研究，得出以下结论:隧道整体的最大相对位移主要发生在主隧道与横通道拱顶和连接处；衬砌相对位移随埋深增加而减小；隧道产生的横向变形更大；横通道边墙位置更容易受到剪切破坏，主隧道与横通道连接处拱脚的弯矩、剪力、最大主应力和最大剪应力最大，应重点采取设防措施。
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| 关 键 词： | 横通道 汶川地震动 动力响应分析 MIDAS/GTS-NX |
Seismic response analysis of cross-passage of a highway tunnel in high intensity zone |
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| ZHANG Nan,YAN Songhong,' target="_blank" rel="external">,LIU Ziyang.Seismic response analysis of cross-passage of a highway tunnel in high intensity zone[J].World Information On Earthquake Engineering,2019,35(3):198-203. |
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| Authors: | ZHANG Nan YAN Songhong " target="_blank">' target="_blank" rel="external"> LIU Ziyang |
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| Institution: | 1. Shenzhen Municipal Design & Research Institute Co., Ltd, Shenzhen 518029, China;2. Key Laboratory of Road & Bridges and Underground Engineering of Gansu Province, Lanzhou 730070, China;3. School of Civil Engineering of Lanzhou Jiaotong University, Lanzhou 730070, China;4. Gansu Province Engineering Laboratory of Rail Transit Mechanics Application, Lanzhou 730070, China |
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| Abstract: | The interface between the main tunnel and the cross-passage of double-hole tunnel is the weak point in the seismic resistance of tunnels. In this study, MIDAS GTS-NX finite element analysis software was used to analyze the seismic response of the cross-passage of the highway tunnel under the action of Wenchuan ground motion for the tunnel passing through the high-intensity earthquake area. Under the combined action of the seismic loads in the X direction and Y direction, based on the calculation results of surrounding rock and lining, the following conclusions are drawn:The maximum relative displacement is at the vault of the joint between tunnels and the cross-passage; the relative displacement of lining decreases with the increase of burial depth; the transverse deformation of the tunnel is larger; the cross passage sidewalls are more vulnerable to shear failure; the bending moment, shear force, maximum principal stress and maximum shear stress of the arch foot at the interface between the main tunnel and the cross-passage are the largest, in which defensive measures should be taken into account with emphasis. |
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| Keywords: | cross-passage Wenchuan ground motion dynamic response analysis MIDAS GTS-NX |
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