地铁隧道与人防地下室相互作用的地震反应分析
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摘要
基于Abaqus软件64CPU显式并行计算集群平台,以南京地铁4号线鼓楼站附近的地下建筑结构为背景,建立了深软地基土-地铁隧道-人防地下室耦合的三维精细化非线性地震反应分析的有限元模型,数值模拟了其在近场汶川大地震清平波、远场大地震Mexico波和100 a超越概率3%的南京人工地震波作用下的地震反应。结果表明:"五心圆形"隧道拱肩及拱腰圆弧连接处附近的损伤值最大,塑性变形的产生导致结构相对位移曲线出现突变;人防地下室的顶底板、侧墙顶底部,尤其转弯处损伤程度最严重,其余部位则较为安全;人防地下室的相对位移曲线光滑,沿高度单调增加;相比隧道,虽然人防地下室局部区域的损伤值略大,但相对位移较小;人防地下室导致隧道的局部区域损伤值略有增大而相对位移大范围明显减小;隧道对人防地下室的影响无明显规律。
Based on the software ABAQUS 64 CPU explicit parallel computing cluster platform, taking underground structures near Nanjing metro line 4 drum tower station as the background, a 3 D refined finite element model was built for a deep soft soil-subway tunnel-civil air defense basement coupled system to numerically simulate its seismic responses under excitations of near-field Wenchuang earthquake Qingping wave, far-field Mexico one and Nanjing artificial seismic one with the exceedance probability of 3% within 100 years, respectively. The results showed that the damage value of the place near "penta-centric circle" tunnel's spandrel and haunch arc joint is the maximum, plastic deformation produced causes sudden changes to appear on the structural relative displacement curve; the damage level is the most serious at roof and floor of basement, top and bottom of side wall, especially, basement turning place, the rest places are safer; the relative displacement curve of civil air defense basement is smooth and it monotonically rises along the height; compared with the tunnel, though damage values of civil air defense basement's local areas are slightly larger, their relative displacements are smaller; civil air defense basement causes damage values of tunnel's local areas to slightly increase while the range of large relative displacement obviously decreases; the influence of tunnel on civil air defense basement has no obvious law.
Based on the software ABAQUS 64 CPU explicit parallel computing cluster platform, taking underground structures near Nanjing metro line 4 drum tower station as the background, a 3 D refined finite element model was built for a deep soft soil-subway tunnel-civil air defense basement coupled system to numerically simulate its seismic responses under excitations of near-field Wenchuang earthquake Qingping wave, far-field Mexico one and Nanjing artificial seismic one with the exceedance probability of 3% within 100 years, respectively. The results showed that the damage value of the place near "penta-centric circle" tunnel's spandrel and haunch arc joint is the maximum, plastic deformation produced causes sudden changes to appear on the structural relative displacement curve; the damage level is the most serious at roof and floor of basement, top and bottom of side wall, especially, basement turning place, the rest places are safer; the relative displacement curve of civil air defense basement is smooth and it monotonically rises along the height; compared with the tunnel, though damage values of civil air defense basement's local areas are slightly larger, their relative displacements are smaller; civil air defense basement causes damage values of tunnel's local areas to slightly increase while the range of large relative displacement obviously decreases; the influence of tunnel on civil air defense basement has no obvious law.
引文
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[2] PAKBAZ M C. 2D analysis of circular tunnel against earthquake loading[J]. Tunneling and Underground Space Technology, 2005(20):411-417.
[3] NISHIYAMA S, MUROYA K, HAYA H, et al. Seismic design of cut and cover tunnel based on damage analyses experimental studies[J]. Quarterly Report of RTRI(Railway Technical Research Institute), 1999, 40(3):158-164.
[4] 陈磊, 陈国兴, 龙慧. 地铁交叉隧道近场强地震反应特性的三维精细化非线性有限元分析[J]. 岩土力学, 2010, 31(12): 3972-3976. CHEN Lei, CHEN Guoxing, LONG Hui.3D refined nonlinear finite element analysis of intersecting metro tunnels under near-field ground motion[J].Rock and Soil Mechanics, 2010, 31(12): 3972-3976.
[5] 胡建平, 刘亚莲. 浅埋交叉隧道地震动力响应及减震措施研究[J]. 地下空间与工程学报, 2015, 11(3): 759-765. HU Jianping, LIU Yalian. Seismic dynamic response analysis of three-dimensional crossing tunnel on soft foundation[J]. Sichuan Building Science, 2015, 11(3): 759-765.
[6] 陶连金, 王文沛, 张波, 等. 竖向强震作用下密贴地铁地下交叉结构动力响应分析[J]. 岩土工程学报, 2012, 34(3): 433-437. TAO Lianjin, WANG Wenpei, ZHANG Bo, et al.Dynamic response of closely-attached intersecting underground subway structures under vertical strong ground motion[J].Chinese Journal of Geotechnical Engineering, 2012, 34(3): 433-437.
[7] 安军海,陶连金,李积栋, 等.地铁双层交叉隧道非线性地震响应分析[J]. 中国铁道科学, 2015, 36(3): 66-72. AN Junhai, TAO Lianjin, LI Jidong,et al. Nonlinear seismic response of double-decked intersecting metro tunnel[J]. CHINA Railway Science, 2015, 36(3): 66-72.
[8] 李积栋, 陶连金, 油新华, 等. 不同净距垂直交叉组合地铁车站结构地震响应研究[J]. 岩石力学与工程学报, 2016, 35(增刊2): 3890-3897. LI Jidong, TAO Lianjin, YOU Xinhua, et al. Study of seismic response of different clear-distance vertical intersecting combination subway station structures[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(S2): 3890-3897.
[9] LIANG J, HAN B, BA Z. 3D diffraction of obliquely incident SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space[J]. Earthquake Science, 2013,26(6):395-406.
[10] FANG X Q, JIN H X, WANG B L. Dynamic interaction of two circular lined tunnels with imperfect interfaces under cylindrical P-waves[J]. International Journal of Rock Mechanics & Mining Sciences, 2015,79:172-182.
[11] ALIELAHI H, ADAMPIRA M. Effect of twin-parallel tunnels on seismic ground response due to vertically in-plane waves[J].International Journal of Rock Mechanics & Mining Sciences, 2016, 85: 67-83.
[12] WANG Huaifeng, LOU Menglin, ZHANG Rulin. In fluence of presence of adjacent surface structure on seismic response of underground structure[J].Soil Dynamics and Earthquake Engineering, 2017, 100: 131-143.
[13] 毛昆明, 陈国兴.基于Abaqus软件的并行计算异构集群平台的搭建[J]. 地震工程与工程振动, 2011, 24(2): 19-22. MAO Kunming, CHEN Guoxing. Construction of parallel computing heterogeneous cluster platform based on Abaqus software[J]. Earthquake Engineering and Engineering Vibration, 2011, 24(2):19-22.
[14] 谷音, 刘晶波, 杜义欣. 三维一致黏弹性人工边界及等效黏弹性边界单元[J]. 工程力学, 2007, 24(12):31-37. GU Yin, LIU Jingbo, DU Yixin.3D consistent viscous-spring artificial boundary and viscous-spring boundary element[J]. Engineering Mechanics, 2007, 24(12):31-37.
[15] LEE J,FENVES G L.Plastic-damage model for cyclic loading of concrete structures[J]. Journal of Engineering Mechanics, 1998, 124(8): 892-900.
[16] 庄海洋, 程绍革, 陈国兴. 阪神地震中大开地铁车站震害机制数值仿真分析[J]. 岩土力学, 2008, 29(1): 245-250. ZHUANG Haiyang, CHENG Shaoge, CHEN Guoxing. Numerical simulation and analysis of earthquake damages of Dakai metro station caused by Kobe earthquake[J]. Rock and Soil Mechanics, 2008, 29(1): 245-250.