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地下工程地震动力响应及抗震研究

期刊名称：岩石力学与工程学报
时间：0
页码：483-490
语言：中文
分类：TU94[建筑科学—建筑技术科学]
作者机构：[1]中国科学院武汉岩土力学所岩土力学与工程国家重点实验室,湖北武汉430071, [2]中交第二公路勘察设计研究院有限公司,湖北武汉430056
相关基金：国家自然科学基金西部重大研究计划项目（90510019）;国家自然科学基金资助项目（40772184,90715042）;中国科学院西部行动计划高新技术研究项目
相关项目：大型地下洞室群地震灾变机理与过程研究

关键词：地下工程, 动力响应, 改进的Newmark隐式积分法, 无限元动力人工边界, 抗震层, underground engineering, dynamic response, improved Newmark implicit integration method, infinite element dynamic artificial boundary, seismic isolation layer

中文摘要：

应用改进的Newmark隐式积分法，采用无限元动力人工边界，研究西藏扎墨公路高烈度地震区嘎隆拉隧道地震动力响应，分析隧道抗震层的减震机制，数值模拟橡胶和泡沫混凝土两类材料抗震层的减震效果。计算结果表明：抗震层虽不能从根本上改变隧道的动力响应，但由于它本身的隔震缓冲作用，能够对衬砌起到较好的隔震效果；两类抗震材料隔震效果相差不大，但考虑到耐久性和经济性，推荐采用泡沫混凝土作隔震材料。研究成果对高烈度地震区地下工程稳定性分析具有一定的借鉴意义。

英文摘要：

Based on improved Newmark＇s implicit integration method, the earthquake-induced dynamic responses of Galongla Tunnel along Zhamo Highway in Tibet are studied using infinite element dynamic artificial boundary technique： and aseismic mechanism of seismic isolation layer is analysed. Furthermore, the shock absorption effects of two kinds of seismic isolation layers, which are made of rubber and foam concrete respectively, are studied and compared those with numerical method. The results show that better shock absorption effects can be achieved because of the good isolation and cushioning effects of the seismic isolation layer despite that the dynamic response of the tunnel cannot be changed essentially. It also can be seen that there are small differences in shock absorption effects between two kinds of seismic isolation materials~ however, foam concrete is recommended because of its durability and economy. Results of this research can provide certain references to stability analysis of underground engineering in highly seismic regions.