[1]孙强强,薄景山,孙有为,等.几何参数对隧道地震反应影响的二维数值分析[J].世界地震工程,2017,33(04):049-58.
 SUN Qiangqiang,BO Jingshan,SUN Youwei,et al.2-D numerical analysis of tunnels against earthquake loading considering geometrical parameters[J].,2017,33(04):049-58.
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几何参数对隧道地震反应影响的二维数值分析
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《世界地震工程》[ISSN:/CN:]

卷:
33
期数:
2017年04期
页码:
049-58
栏目:
出版日期:
2017-11-25

文章信息/Info

Title:
2-D numerical analysis of tunnels against earthquake loading considering geometrical parameters
作者:
孙强强1 薄景山12 孙有为1 张兆鹏2
1. 防灾科技学院, 河北 三河 065201;
2. 中国地震局工程力学研究所 地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080
Author(s):
SUN Qiangqiang1 BO Jingshan12 SUN Youwei1 ZHANG Zhaopeng2
1. Institute of Disaster Prevention, Sanhe 065201, China;
2. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
关键词:
隧道地震反应埋深径厚比有限差分方法动力时程分析
Keywords:
seismic response of tunnelsburied depthdiameter-to-thickness ratioFDMdynamic analysis
分类号:
TU4
摘要:
隧道结构地震破坏的原因众多,几何因素的影响不可忽视。基于有限差分方法,构建一系列数值计算模型,比较了不同埋深、直径、衬砌厚度和径厚比时隧道结构的地震响应特性,并采用相对变形比和内力放大系数定量分析了隧道的变形、内力分布和内力峰值与几何参数间的关系。计算结果表明:内力放大系数随着埋深的增加而减小,埋深大于20m,输入地震动幅值小于0.2g时,隧道拱顶底间相对位移峰值和相同位置处自由场相对位移峰值接近;衬砌厚度对动弯矩的影响较动轴力显著,增加衬砌厚度会显著的增大隧道的动弯矩峰值,但弯矩放大系数随着衬砌厚度的增加而减小;隧道的动内力峰值随着直径的增加而增大,而轴力放大系数则随着直径的增加而减小;径厚比显著影响衬砌结构的内力分布,当径厚比大于10时,隧道结构发生显著的内力偏转。
Abstract:
The effects of geometrical parameters on the seismic response of tunnel in soils are discussed. The dynamic analysis is performed using the finite difference method and the soil behavior is simulated with Mohr-Coulomb elastoplastic model. Numerical models are developed to simulate the seismic response after considering various buried depths, diameters, thicknesses and diameter-to-thickness ratios. It is shown that the internal forces amplification factor is larger at shallow tunnels, and the maximum relative displacement of tunnel crown and invert is approximately equal to that of freefield when the depth is larger than 20 m and PGA is less than 0.2 g. Analysis also reveals that lining thickness has significant influence on the seismic-induced bending moments, but axial forces are limited. The bending moment amplification factor decreases with the lining thickness increasing. The maximum seismic-induced internal forces are larger at big diameter, there is an inverse relationship between the axial forces amplification factor and the diameter. It also can be seen that the diameter-to-thickness ratio affects the internal force distribution of the lining. The tunnel lining has a significant internal force deflection when it is greater than 10.

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备注/Memo

备注/Memo:
收稿日期:2017-01-16;改回日期:2017-04-20。
基金项目:国家自然科学基金(51208108);中央高校基本科研业务费研究生科技创新基金项目(ZY20160302)
作者简介:孙强强(1992-),男,硕士研究生,从事地下结构抗震研究.E-mail:sun_ease@126.com
通讯作者:薄景山(1958-),男,教授,博士生导师,主要从事岩土地震工程研究.E-mail:bojingshan@163.com
更新日期/Last Update: 1900-01-01