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非一致激励下长距离输水隧道地震响应分析

ISSN号：0559-9350
期刊名称：水利学报
时间：2013.6.15
页码：718-725
分类：TV672[水利工程—水利水电工程]
作者机构：[1]上海交通大学土木工程系,上海200030, [2]同济大学地下建筑与工程系,上海200092, [3]同济大学岩土及地下工程教育部重点实验室,上海200092, [4]上海青草沙投资建设发展有限公司,上海201206, [5]上海市隧道工程轨道交通设计研究院,上海200235
相关基金：基金项目：国家自然科学基金资助项目（51208296）;中国博士后科学基金资助项目（2012M510113）;国家“十一五”科技支撑计划（2011BAG07801）;国家“十二五”科技支撑计划（2012BAK24800）;长江学者和创新团队发展计划（IRT1029）
相关项目：非一致地震激励下长隧道多尺度动力分析方法

关键词：输水隧道, 非一致激励, 数值方法, 大规模计算, 地震响应分析, water-conveying tunnel, non-uniform excitation, numerical method, large-scale computation, seismic response analysis

中文摘要：

近年长隧道结构震害频发，随着调水工程大规模建设，长距离输水隧道抗震性能的重要性愈加突出。在隧道传统抗震分析方法的基础上，针对非一致地震动作用下地基土一长距离输水隧道体系的地震响应问题，建立了非一致激励下长距离输水隧道的大规模地震响应分析方法，并以上海市某重点工程中的长距离输水隧道为工程应用，计算模型中不仅考虑了土体的动力滞回非线性、土体与隧道之间的接触非线性等因素，而且引入“附加质量法”来考虑地震作用下输水隧道内水体的动水压力作用。与一致激励的计算结果对比表明，非一致地震激励会显著增加输水隧道结构的内力和变形响应，从而对隧道抗震产生不利影响。研究结论可为长输水隧道结构的抗震设计和分析提供科学依据。

英文摘要：

Long tunnels suffered great damages in recent earthquakes frequently. With the increasing of large amount of water conveying engineering under construction, the seismic performance of long-distance water-conveying tunnels is significant. Based on the deficiency of traditional method for large-scale seismic computation, a large-scale analysis method is proposed to solve the non-uniform seismic response problems of the complex soil-long tunnel-water system. As an application, the presented method is used in an exist- ing long-distance water tunnel, which is one of the key projects in Shanghai. Both the nonlinear hysteretic constitutive model of soil and nonlinear contact behaviors between soil and tunnel are considered in the es- tablished numerical model. Furthermore, the added mass method is introduced to simplify the effect of dy- namic water pressure on the tunnel liner when subjected to seismic loadings. Two seismic input modes, the uniform and non-uniform excitations, are involved in the seismic analyses of the long water tunnel system. Compared with the uniform seismic input, the results show that the non-uniform excitation can remarkably increase both stress and deformation responses of the long tunnel, which makes adverse influence on the seismic performance of the tunnel. The research conclusions are beneficial to proving theoretical criterions for seismic design and analysis of long water-conveying tunnels.

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