近场地震动作用下背后空洞圆形隧洞的动力损伤特性试验研究
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摘要
文章考虑近场地震动作用,对背后存在空洞的圆形隧洞进行了振动台模型试验,对比分析了地基场域加速度反应、土—结构接触动土压力、隧洞结构加速度反应及其动应变规律,并基于损伤模型研究了近场地震动作用对隧洞结构的动力损伤行为。研究结果表明:1)地震波加载过程中,圆形隧洞不同位置横截面处的加速度反应存在少许差别,隧洞结构的存在会对两侧地基土峰值加速度产生影响,但频谱特性变化并不明显;2)当输入近场地震动强度较小时,结构顶部空洞横截面的平均峰值加速度较小、平均动应变反应较大,而结构顶部密实状态横截面的平均峰值加速度较大、平均动应变反应较小;3)若采用应变损伤模型衡量结构的破坏程度,在衬砌背后存在空洞的横截面顶部±30°附近圆形隧洞损伤程度最大,这与已有的圆形隧洞震害现象吻合。
Considering the effect of near-field ground motion,a shaking table model test was conducted to the circular tunnel with voids behind the lining.A comparative analysis was taken with aspects of acceleration response of foundation field domain,dynamic earth pressure of soil-structure contact surface,acceleration response of tunnel structure and dynamic strain rules.Meanwhile,the effect of near field ground motion on dynamic damage behaviors of the tunnel structure was studied based on a damage model.The results show that:1)there is slight difference in the acceleration response at the different cross sections of the circular tunnel in the process of seismic wave loading,and tunnel structure affects the peak acceleration of subsoil at two sides while the changes of spectrum characteristics are not obvious;2)when the intensity of input near-field ground motion is small,the average peak acceleration at the cross section with top voids is also small but the average dynamic strain response is large while the average peak acceleration at the cross section with dense top is large but the average dynamic strain response is small;3)the damage is most serious at the scope of±30°of the top of the cross section with voids behind the lining,which agrees with the seismic damage of existing circular tunnel.
Considering the effect of near-field ground motion,a shaking table model test was conducted to the circular tunnel with voids behind the lining.A comparative analysis was taken with aspects of acceleration response of foundation field domain,dynamic earth pressure of soil-structure contact surface,acceleration response of tunnel structure and dynamic strain rules.Meanwhile,the effect of near field ground motion on dynamic damage behaviors of the tunnel structure was studied based on a damage model.The results show that:1)there is slight difference in the acceleration response at the different cross sections of the circular tunnel in the process of seismic wave loading,and tunnel structure affects the peak acceleration of subsoil at two sides while the changes of spectrum characteristics are not obvious;2)when the intensity of input near-field ground motion is small,the average peak acceleration at the cross section with top voids is also small but the average dynamic strain response is large while the average peak acceleration at the cross section with dense top is large but the average dynamic strain response is small;3)the damage is most serious at the scope of±30°of the top of the cross section with voids behind the lining,which agrees with the seismic damage of existing circular tunnel.
引文
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[2]王建宁,窦远明,田贵州,等.圆形隧道衬砌背后空洞对隧道结构影响的振动台模型试验[J].工业建筑, 2017, 47(3):118-124+147.WANG Jianning, DOU Yuanming, TIAN Guizhou, et al. Shaking Table Mode Test Study of the Effect on Tunnel Structure ExistingVoid behind Lining of Circular Tunnel[J]. Industrial Construction, 2017, 47(3):118-124+147.
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[7]权登州,王毅红,叶丹,等.黄土地区地铁车站振动台试验研究[J].土木工程学报, 2016, 49(11):79-90.QUAN Dengzhou, WANG Yihong, YE Dan, et al. Shaking Table Test Study on Subway Station Built in Loess Area[J]. China CivilEngineering Journal, 2016, 49(11):79-90.
[8] MASOUD R M, MOHAMMAD H B. Seismic Ground Motion Amplification Pattern Induced by a Subway Tunnel:Shaking TableTesting and Numerical Simulation[J]. Soil Dynamics and Earthquake Engineering, 2016, 83:81-97.
[9] CHEN Z Y, SHEN H. Dynamic Centrifuge Tests on Isolation Mechanism of Tunnels Subjected to Seismic Shaking[J]. Tunnellingand Underground Space Technology, 2014, 42:67-77.
[10] CHEN G X, CHEN S, ZUO X, et al. Shaking Table Tests and Numerical Simulations on a Subway Structure in a Soft Soil[J]. SoilDynamic and Earthquake Engineering, 2015, 76:13-28.
[11]安军海,陶连金,王焕杰,等.可液化场地下盾构扩挖地铁车站结构地震破坏机制振动台试验[J].岩石力学与工程学报,2017, 36(8):2018-2030.AN Junhai, TAO Lianjin, WANG Huanjie, et al. A Shaking Table-based Experimental Study of Seismic Response of a Shield-en?large-dig Type Subway Station Structure in Liquefiable Ground[J]. China Journal of Rock Mechanics and Engineering, 2017, 36(8):2018-2030.
[12]邓涛,章仕灵,姚金梅,等.考虑地震作用的山岭隧道空洞加固方案优化研究[J].地下空间与工程学报,2013,9(3):640-645.DENG Tao, ZHANG Shiling, YAO Jinmei, et al. Research on Optimized Tunnel Cavity Reinforcement Scheme Considering theEarthquake Action[J]. Chinese Journal of Underground Space and Engineering, 2013, 9(3):640-645.
[13]应国刚,张顶立,陈立平,等.荷载结构模型在拱顶空洞存在情况下的修正[J].土木工程学报, 2015, 48(增1):181-185.YING Guogang, ZHANG Dingli, CHEN Liping, et al. Amendment of Load-structure Model with Voids behind Tunnel Lining atVault[J]. China Civil Engineering Journal, 2015, 48(S1):181-185.
[14]刘敦文,杨光,彭怀德.爆破作用下拱顶衬砌脱空对隧道结构安全的影响分析[J].中南大学学报(自然科学版), 2013, 44(10):4214-4220.LIU Dunwen, YANG Guang, PENG Huaide. Analysis for Impact of Structural Safety of Tunnel Induced by Cavity on Vault of Liningunder Blasting[J]. Journal of Central South University(Science and Technology), 2013, 44(10):4214-4220.
[15]窦远明,王建宁,田贵州,等.软弱土质相似材料配比的正交试验研究[J].重庆交通大学学报(自然科学版), 2018, 37(4):65-71.DOU Yuanming, WANG Jianning, TIAN Guizhou, et al. Orthogonal Test Study on the Ratio of Soft Soil Similar Materials[J]. Journalof Chongqing Jiaotong University(Natural Science), 2018, 37(4):65-71.
[16]王建宁,窦远明,魏明,等.土-隧道结构动力相互作用振动台模型试验中传感器位置的优选[J].长江科学院院报, 2018.WANG Jianning, DOU Yuanming, WEI Ming, et al. Optimization of Sensor Positions in a Shaking Table Test for Soil-tunnel Struc?ture Interactions[J]. Journal of Yangtze River Scientific Research Institute, 2018.
[17]陈国兴,左熹,王志华,等.近远场地震作用下液化地基上地铁车站结构动力损伤特性的振动台试验[J].土木工程学报,2010, 43(12):120-126.CHEN Guoxing, ZUO Xi, WANG Zhihua, et al. Large Scale Shaking Table Test Study of the Dynamic Damage Behavior of SubwayStation Structures in Liquefiable Foundation under Near-fault and Far-field Ground Motions[J]. China Civil Engineering Journal,2010, 43(12):120-126.
[2]王建宁,窦远明,田贵州,等.圆形隧道衬砌背后空洞对隧道结构影响的振动台模型试验[J].工业建筑, 2017, 47(3):118-124+147.WANG Jianning, DOU Yuanming, TIAN Guizhou, et al. Shaking Table Mode Test Study of the Effect on Tunnel Structure ExistingVoid behind Lining of Circular Tunnel[J]. Industrial Construction, 2017, 47(3):118-124+147.
[3]杜修力,马超,路德春,等.大开地铁车站地震破坏模拟与机理分析[J].土木工程学报, 2017, 50(1):53-62+69.DU Xiuli, MA Chao, LU Dechun, et al. Collapse simulation and failure mechanism analysis of the Daikai subway station under seis?mic loads[J]. China Civil Engineering Journal, 2017, 50(1):53-62+69.
[4]欧阳志勇,崔杰,李亚东,等.液化土层中不同刚度隧道结构的振动台试验研究[J].现代隧道技术, 2018, 55(4):97-105+131.OUYANG Zhiyong, CUI Jie, LI Yadong, et al. Shaking Table Test for a Tunnel Structure with Different Stiffnessces in a Layer of SoilLiquefaction[J]. Modern Tunnelling Technology, 2018, 55(4):97-105+131.
[5]朱正国,耿亚帅,武杰,等.地震作用下隧道衬砌背后空洞影响机制研究[J].铁道工程学报, 2015,(9):79-84.ZHU Zhengguo, GENG Yashuai, WU Jie, et al. Research on the Effect Mechanism of Cavity behind Tunnel Lining under the Earth?quake Action[J]. Journal of Railway Engineering Society, 2015,(9):79-84.
[6]聂子云,张春雷,李凤翔.衬砌背后空洞对隧道抗震性能影响分析[J].地震工程学报, 2015, 37(1):138-143.NIE Ziyun, ZHANG Chunlei, LI Fengxiang. Effect of Void behind Lining on Seismic Performance of Tunnel[J]. China EarthquakeEngineering Journal, 2015, 37(1):138-143.
[7]权登州,王毅红,叶丹,等.黄土地区地铁车站振动台试验研究[J].土木工程学报, 2016, 49(11):79-90.QUAN Dengzhou, WANG Yihong, YE Dan, et al. Shaking Table Test Study on Subway Station Built in Loess Area[J]. China CivilEngineering Journal, 2016, 49(11):79-90.
[8] MASOUD R M, MOHAMMAD H B. Seismic Ground Motion Amplification Pattern Induced by a Subway Tunnel:Shaking TableTesting and Numerical Simulation[J]. Soil Dynamics and Earthquake Engineering, 2016, 83:81-97.
[9] CHEN Z Y, SHEN H. Dynamic Centrifuge Tests on Isolation Mechanism of Tunnels Subjected to Seismic Shaking[J]. Tunnellingand Underground Space Technology, 2014, 42:67-77.
[10] CHEN G X, CHEN S, ZUO X, et al. Shaking Table Tests and Numerical Simulations on a Subway Structure in a Soft Soil[J]. SoilDynamic and Earthquake Engineering, 2015, 76:13-28.
[11]安军海,陶连金,王焕杰,等.可液化场地下盾构扩挖地铁车站结构地震破坏机制振动台试验[J].岩石力学与工程学报,2017, 36(8):2018-2030.AN Junhai, TAO Lianjin, WANG Huanjie, et al. A Shaking Table-based Experimental Study of Seismic Response of a Shield-en?large-dig Type Subway Station Structure in Liquefiable Ground[J]. China Journal of Rock Mechanics and Engineering, 2017, 36(8):2018-2030.
[12]邓涛,章仕灵,姚金梅,等.考虑地震作用的山岭隧道空洞加固方案优化研究[J].地下空间与工程学报,2013,9(3):640-645.DENG Tao, ZHANG Shiling, YAO Jinmei, et al. Research on Optimized Tunnel Cavity Reinforcement Scheme Considering theEarthquake Action[J]. Chinese Journal of Underground Space and Engineering, 2013, 9(3):640-645.
[13]应国刚,张顶立,陈立平,等.荷载结构模型在拱顶空洞存在情况下的修正[J].土木工程学报, 2015, 48(增1):181-185.YING Guogang, ZHANG Dingli, CHEN Liping, et al. Amendment of Load-structure Model with Voids behind Tunnel Lining atVault[J]. China Civil Engineering Journal, 2015, 48(S1):181-185.
[14]刘敦文,杨光,彭怀德.爆破作用下拱顶衬砌脱空对隧道结构安全的影响分析[J].中南大学学报(自然科学版), 2013, 44(10):4214-4220.LIU Dunwen, YANG Guang, PENG Huaide. Analysis for Impact of Structural Safety of Tunnel Induced by Cavity on Vault of Liningunder Blasting[J]. Journal of Central South University(Science and Technology), 2013, 44(10):4214-4220.
[15]窦远明,王建宁,田贵州,等.软弱土质相似材料配比的正交试验研究[J].重庆交通大学学报(自然科学版), 2018, 37(4):65-71.DOU Yuanming, WANG Jianning, TIAN Guizhou, et al. Orthogonal Test Study on the Ratio of Soft Soil Similar Materials[J]. Journalof Chongqing Jiaotong University(Natural Science), 2018, 37(4):65-71.
[16]王建宁,窦远明,魏明,等.土-隧道结构动力相互作用振动台模型试验中传感器位置的优选[J].长江科学院院报, 2018.WANG Jianning, DOU Yuanming, WEI Ming, et al. Optimization of Sensor Positions in a Shaking Table Test for Soil-tunnel Struc?ture Interactions[J]. Journal of Yangtze River Scientific Research Institute, 2018.
[17]陈国兴,左熹,王志华,等.近远场地震作用下液化地基上地铁车站结构动力损伤特性的振动台试验[J].土木工程学报,2010, 43(12):120-126.CHEN Guoxing, ZUO Xi, WANG Zhihua, et al. Large Scale Shaking Table Test Study of the Dynamic Damage Behavior of SubwayStation Structures in Liquefiable Foundation under Near-fault and Far-field Ground Motions[J]. China Civil Engineering Journal,2010, 43(12):120-126.