沉管隧道三维地震反应分析
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摘要
以京沪高速铁路南京长江沉管隧道为背景,研究地震动作用下沉管隧道的响应,计算中计及水的影响,采用粘 弹性人工边界以模拟地基的无限性.由模态计算得到体系的振型和频率,以确定积分时间步长和阻尼系数.运用Newmark隐式时间积分方法,计算了100a超越概率63%,10%和2%地震动作用下沉管隧道的反应,确定了管身段和接头部位的应力和位移.计算结果可为沉管隧道设计提供参考.
Based on the immersed tunnel which is planning to drill through the Changjiang river in Nanjing in the high speed railway from Beijing to Shanghai, the seismic response analysis of the tunnel is studied in this paper. The effect of the river is considered and a viscousspring boundary is applied in order to simulate the semiinfinity feature of the soil. The damp coefficients and the rational step time of vibration analysis are defined applying the subspace iteration method. Finally, Based on Newmark Stepbystep time integration method, the dynamic response of the tunnel is analyzed under three seismic load situations: 63% exceeding probability, 10% exceeding probability, and 2% exceeding probability in 100 years. The stress and the displacements in liner and in tiein are determined. The numerical results will provide reference for the design of the tunnel.
Based on the immersed tunnel which is planning to drill through the Changjiang river in Nanjing in the high speed railway from Beijing to Shanghai, the seismic response analysis of the tunnel is studied in this paper. The effect of the river is considered and a viscousspring boundary is applied in order to simulate the semiinfinity feature of the soil. The damp coefficients and the rational step time of vibration analysis are defined applying the subspace iteration method. Finally, Based on Newmark Stepbystep time integration method, the dynamic response of the tunnel is analyzed under three seismic load situations: 63% exceeding probability, 10% exceeding probability, and 2% exceeding probability in 100 years. The stress and the displacements in liner and in tiein are determined. The numerical results will provide reference for the design of the tunnel.
引文
[1] 朱镜清,周 建.海底隧道体系地震反应分析方法[J].地震工程与工程振动,1992,(2):90-97.
[2] 潘昌实.隧道力学数值方法[M].北京:中国铁道出版社,1995,295-350.
[3] 刘晶波,吕彦东.结构 地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,(3):55-64.
[4] 京沪高速铁路线、桥、隧、站初步设计暂行规定[Z].北京:铁道部科学研究院,1997.
[5] 武晓军.南京长江沉管隧道接头设计研究[Z].成都:铁道部科学研究院西南分院,1998.
[6] 赵国光,刘德权.京沪高速铁路南京上元门越江工程桥隧场地地震安全性评价报告[Z].北京:中国地震局地壳应力研究所,1998.
[2] 潘昌实.隧道力学数值方法[M].北京:中国铁道出版社,1995,295-350.
[3] 刘晶波,吕彦东.结构 地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,(3):55-64.
[4] 京沪高速铁路线、桥、隧、站初步设计暂行规定[Z].北京:铁道部科学研究院,1997.
[5] 武晓军.南京长江沉管隧道接头设计研究[Z].成都:铁道部科学研究院西南分院,1998.
[6] 赵国光,刘德权.京沪高速铁路南京上元门越江工程桥隧场地地震安全性评价报告[Z].北京:中国地震局地壳应力研究所,1998.
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