| 瑞利波作用下隧道洞口段的抗震设防长度 |
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| 引用本文： | 索然绪,王艳艳.瑞利波作用下隧道洞口段的抗震设防长度[J].公路,2011(9):251-255. |
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| 作者姓名： | 索然绪 王艳艳 |
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| 作者单位： | 1. 西安公路研究院 西安市710054
2. 西安铁路职业技术学院 西安市 710014 |
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| 基金项目： | 国家自然科学基金项目,项目编号50878187 |
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| 摘 要： | 隧道洞口段是隧道抗震设计的薄弱部位,从瑞利波动方程出发,推导了洞口段地层在瑞利波作用下的峰值位移、峰值加速度和地层曲率的计算公式,并探讨了洞口段抗震设防长度.分析结果表明在瑞利波作用下,地层位移、曲率和加速度随埋深的增大而迅速减小,因此,当洞口埋深达到一定程度后,地层对隧道的强加位移已很小,无需再设防；现行隧道设计规范...
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| 关 键 词： | 隧道 洞口段 瑞利波 抗震 设防长度 |
Seismic Fortification Length of Tunnel Portals Under Rayleigh Wave Action |
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| SUO Ran-xu,WANG Yan-yan.Seismic Fortification Length of Tunnel Portals Under Rayleigh Wave Action[J].Highway,2011(9):251-255. |
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| Authors: | SUO Ran-xu WANG Yan-yan |
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| Institution: | SUO Ran-xu1,WANG Yan-yan2(1.Xi'an Highway Research Institute,Xi'an,710054,China,2.Xi'an Railway Vocational &Technical Institute,Xi'an 710014,China) |
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| Abstract: | Tunnel portals are the weak point in the seismic design of tunnels.Based on wave equations of Rayleigh waves,the calculation formula of displacment,acceleration and curvature of the ground are gained,and the seismic fortification lengths of tunnel portals are discussed.The results show that(1) the displacment,acceleration and curvature of the ground decreased rapidly as the burial depth increased under the Rayleigh wave action;(2) seismic fortification length should be prolonged.In the end,seismic fortifica... |
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| Keywords: | tunnel portal Rayleigh wave seismic fortification length |
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