软土层场地复杂地铁地下车站结构地震反应分析

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (19) : 115-122.

论文

王建宁1，庄海洋2，马国伟1，于旭2，窦远明1,3，李景文1

作者信息 +

Seismic responses of a complicated subway underground station in soft soil layers

WANG Jianning1, ZHUANG Haiyang2, MA Guowei1, YU Xu2, DOU Yuanming1,3, LI Jingwen1

Author information +

文章历史 +

摘要

软土层对地下结构的地震反应具有重要影响，以往已对软土地基中规则矩形地铁地下车站结构的地震反应进行过研究，其规律对于复杂截面地下结构是否适用还需要进一步探讨。通过考虑车站结构侧向、底部分别存在不同埋深、不同厚度软土层时的27种软土层场地，对上层五跨、下层三跨的新型复杂大型地铁地下车站结构地震反应进行分析，揭示了此类异跨地铁车站结构的地震反应特征，初步给出了软土层埋深、厚度变化对此类车站结构加速度反应、侧向位移反应和地震破坏特征的影响规律。结果表明：异跨车站结构两侧或下方一定范围内存在软土层或将减小结构的加速度反应，而当底板以下20m深处存在软土层时结构顶板的加速度反应则被大幅放大，约为7.88%~12.72%；异跨车站结构侧向位移沿高度的变化曲线具有明显的“阶梯效应”；软土层位于结构侧向时对结构抗震不利，并且当软土层位于下层侧方时结构的动力反应较大，而当软土层位于结构底板下方时能够起到一定的隔震作用。

Abstract

Soft soil layer has important influence on seismic responses of underground structure. In the past, seismic responses of regular rectangular subway station in soft soil base were studied, but if their laws are suitable for underground structures with complex cross-section needs to further explore. Here, considering there were 27 soft soil sites with different buried depth and different thickness of soft soil layer at the side and the bottom of a new subway underground station structure, seismic responses of this station with 5 spans in its upper floor and 3 spans in its lower floor were studied. Influence laws of soft soil layer buried depth and its thickness on the station structure’s acceleration responses, lateral displacement responses and seismic damage features were deduced preliminarily. The results showed that when soft soil layer exists within a certain range of two sides or bottom of the station structure, acceleration responses of the station with different spans may be reduced; when there is a soft soil layer 20 meters below the bottom of the station, its top acceleration is amplified by 7.88%-12.72%; the station lateral displacement curve changes along the height with an obvious step effect; soft soil layer existing at the station lateral is not good for anti-earthquake of the station; when soft soil layer exists at the station lower floor lateral, dynamic responses of the station are larger; soft soil layer existing below the bottom of the station can have a certain seismic isolation effect on the station.

导出引用

王建宁1，庄海洋2，马国伟1，于旭2，窦远明1,3，李景文1. 软土层场地复杂地铁地下车站结构地震反应分析[J]. 振动与冲击, 2019, 38(19): 115-122

WANG Jianning1, ZHUANG Haiyang2, MA Guowei1, YU Xu2, DOU Yuanming1,3, LI Jingwen1. Seismic responses of a complicated subway underground station in soft soil layers[J]. Journal of Vibration and Shock, 2019, 38(19): 115-122

参考文献

[1] 杜修力, 李洋, 许成顺, 等. 1995年日本阪神地震大开地铁车站震害原因及成灾机理分析研究进展[J]. 岩土工程学报, 2018, 40(2): 223-236.
DU Xiuli, LI Yang, XU Chengshun, et al. Review on damage causes and disaster mechanism of Daikai subway station during 1995 Osaka-Kobe Earthquake[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(2): 223-236.
[2] ZHUANG H Y, HU Z H, WANG X J, et al. Seismic responses of a large underground structure in liquefied soils by FEM numerical modelling[J]. Bulletin of Earthquake Engineering, 2015, 13(12): 3645-3668.
[3] CHIAN S C, MADABHUSHI S P G. Effect of buried depth and diameter on uplift of underground structures in liquefied soils. Soil Dynamic and Earthquake Engineering, 2012, 41: 181-190.
[4] HUO H, BOBET A, FERNANDEZ G, et al. Load transfer mechanisms between underground structure and surrounding ground: evaluation of the failure of the Daikai Station[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2005, 131(12): 1522-1533.
[5] 庄海洋, 陈国兴. 地铁地下结构抗震[M]. 北京: 科学出版社, 2017.
[6] IIDA H, HIROTO T, YOSHIDA N, et al. Damage to Daikai subway station[J]. Soils and Foundations, Special Issue on Geotechnical Aspects of the January 17 1995 Hyogoken-Nambu Earthquake. Japanese Geotechnical Society, 1996, 34 : 283-300.
[7] 中国地震局工程力学研究所. 新西兰6.3级地震震害初步分析[R]. 2010.
[8] 王雪剑. 复杂地基中地铁地下结构振动台实验及其动力变形特性研究[D]. 南京: 南京工业大学, 2017.
WANG Xuejian. The study of shaking table test and dynamic deformation characteristics of Metro structures in complex foundations[D]. Nanjing: Nanjing University of Technology, 2017.
[9] 王雪剑, 庄海洋, 陈国兴, 等. 地下连续墙对叠合墙式地铁车站结构地震反应的影响研究[J]. 岩土工程学报, 2017, 39(8): 1435-1443.
WANG Xuejian, ZHUANG Haiyang, CHEN Guoxing, et al. Effect of diaphragm wall on earthquake responses of an underground subway station[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(8): 1435-1443.
[10] 李伟华, 赵成刚, 杜楠馨. 软弱饱和土夹层对地铁车站地震响应的影响分析[J]. 岩土力学, 2010, 31(12): 3958-3963+3970.
LI Weihua, ZHAO Chenggang, DU Nanxin. Analysis of effects of saturated soft interlayer on seismic responses of metro station[J]. Rock and Soil Mechanics, 2010, 31(12): 3958-3963+3970.
[11] 刘春晓, 陶连金, 边金, 等. 可液化土层的位置对土层—地下结构地震反应的影响[J]. 湖南大学学报: 自然科学版, 2017, 44(5): 143-156.
LIU Chunxiao, TAO Lianjin, BIAN Jin, et al. Research on seismic response of the soft and underground structure caused by liquefiable soil in different positions[J]. Journal of Hunan University: Natural Sciences, 2017, 44(5): 143-156.
[12] 李积栋, 陶连金, 安军海, 等. 超浅埋大跨度Y形柱双层地铁车站三维地震响应分析[J]. 中南大学学报: 自然科学版, 2015, 46(2): 653-660.
LI Jidong, TAO Lianjin, AN Junhai, et al. Analysis of 3D seismic response of super-shallow and large-span Y-shaped column double-layer subway station[J]. Journal of Central South University: Science and Technology, 2015, 46(2): 653-660.
[13] 龙慧, 陈国兴, 庄海洋, 等. 深软场地地铁地下车站结构近、远场地震反应数值分析[J]. 南京工业大学学报: 自然科学版, 2014, 36(3): 45-51.
LONG Hui, CHEN Guoxing, ZHUANG Haiyang, et al. Numerical analysis on seismic response of underground subway station under near and far field ground motion in deep soft site[J]. Journal of Nanjing Tech University: Natural Science Edition, 2014, 36(3): 45-51.
[14] 陈苏, 唐柏赞, 刘爱文, 等. 变截面地铁地下车站三维地震反应特性数值模拟[J]. 地震地磁观测与研究, 2016, 37(5): 41-48.
CHEN Su, TANG Baizan, LIU Aiwen, et al. 3-D numerical simulation on seismic behavior of variable cross-section subway station structure in complex geological ground[J]. Seismological and Geomagnetic Observation and Research, 2016, 37(5): 41-48.
[15] 路德春, 李云, 马超, 等. 斜入射地震作用下地铁车站结构抗震性能分析[J]. 北京工业大学学报, 2016, 42(1): 87-94.
LU Dechun, LI Yun, MA Chao, et al. Analysis of the three-dimensional seismic performance of underground[J].Journal of Beijing University of Technology, 2016, 42(1): 87-94.
[16] 庄海洋, 陈国兴. 对土体动力粘塑性记忆型嵌套面模型的改进[J]. 岩土力学, 2009, 30(1): 118-122.
ZHUANG Haiyang, CHEN Guoxing. Improvement of dynamic viscoplastic memorial nested yield surface model of soil[J]. Rock and Soil Mechanics, 2009, 30(1): 118-122.
[17] LEE J, FENVES G L. Plastic-damage model for cyclic loading of concrete structures[J]. Journal of Engineering Mechanics, 1998, 124(8): 892-900.
[18] LUBLINER J, OLIVER J, OLLER S, et al. A plastic-damage model for concrete[J]. International Journal of Solids and Structures, 1989, 25(3): 299-326.
[19] ZHUANG H Y, HU Z H, CHEN G X. Numerical modeling on the seismic responses of a large underground structure in soft ground[J]. Journal of Vibroengineering, 2015, 17(2): 802-815.
[20] 庄海洋, 王修信, 陈国兴. 软土层埋深变化对地铁车站结构地震反应的影响规律研究[J]. 岩土工程学报, 2009, 31(8): 1258-1266.
ZHUANG Haiyang, WANG Xiuxin, CHEN Guoxing. Earthquake responses of subway station with different depths of soft soil[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(8): 1258-1266.
[21] 庄海洋, 陈国兴, 王修信. 软土层厚度对地铁车站结构地震反应的影响规律研究[J]. 地震工程与工程振动, 2008, 28(6): 245-253.
ZHUANG Haiyang, CHEN Guoxing, WANG Xiuxin. Study on the earthquake responses of subway station built with different thicknesses of soft soil layers in the foundation[J]. Journal of Earthquake Engineering and Engineering Vibration, 2008, 28(6): 245-253.