高烈度地震区公路填方路基大型振动台模型试验
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摘要
为了深入研究公路填方路基的抗震安全,根据试验要求对填方路基进行了大型振动台模型试验方案设计。方案设计中首先介绍了振动台台阵体系、模型箱的设计和数据采集系统等试验装置;然后分析了填方路基振动台模型边界条件的处理和填方路基模型的相似关系,并在已有研究成果基础上结合本次试验特性确定了模型的相似常数,通过采用等量代替法来处理模型材料的相似级配,最终确定了模拟模型路基的试验材料。同时,在对填方路基数值分析的基础上,根据路基数值模型的动力反应特性确定了振动台试验测点的布置方案。最后,根据模型试验目的,编制了模型试验的加载制度。试验结果表明,填方路基的大型振动台模型试验设计方案可行,达到了振动台试验的目的。
In order to study the seismic safety of highway fill subgrade,according to the test requirement,a large-scale shaking table model test scheme was designed for fill subgrade.First,the vibration system,the design of model box and the data acquisition system were introduced,the similar relation between treatment of the model boundary condition and fill subgrade model was analyzed,and the similarity constants are determined combining the test characteristics.The model material was determined by using the equivalent substitution method to deal with the similar gradation.Meanwhile,the arrangement of sensors was selected based on the numerical analysis of dynamic response characteristics.Finally,the loading scheme of the model test was prepared according to its purpose.The test result shows that the design of large-scale shaking table model test is feasible,and the purpose of the shaking table test was achieved.
In order to study the seismic safety of highway fill subgrade,according to the test requirement,a large-scale shaking table model test scheme was designed for fill subgrade.First,the vibration system,the design of model box and the data acquisition system were introduced,the similar relation between treatment of the model boundary condition and fill subgrade model was analyzed,and the similarity constants are determined combining the test characteristics.The model material was determined by using the equivalent substitution method to deal with the similar gradation.Meanwhile,the arrangement of sensors was selected based on the numerical analysis of dynamic response characteristics.Finally,the loading scheme of the model test was prepared according to its purpose.The test result shows that the design of large-scale shaking table model test is feasible,and the purpose of the shaking table test was achieved.
引文
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[11]李德寅,王邦楣,林亚超.结构模型试验[M].北京:科学出版社,1996.LI Deyin,WANG Bangmei,LIN Yachao.Structure ModelTest[M].Beijing:Science Press,1996.
[12]左东启.模型试验的理论和方法[M].北京:中国水利水电出版社,1984.ZUO Dongqi.The Theories and Methods for the Model Test[M].Beijing:China Water Power Press,1984.
[13]迟世春,林少书.结构动力模型试验相似理论及其验证[J].世界地震工程,2004,20(4):11-20.CHI Shichun,LIN Shaoshu.Validation of Similitude Lawsfor Dynamic Structural Model Test[J].World EarthquakeEngineering,2004,20(4):11-20.
[14]范书立,陈建云,王建涌,等.高拱坝振动台地震破坏试验研究及数值仿真[J].岩石力学与工程学报,2009,28(3):467-474.FANG Shuli,CHEN Jianyun,WANG Jianyong,et al.Experimental Study and Numerical Simulation for SeismicFailure of High Arch Dam on Shaking Table[J].ChineseJournal of Rock Mechanics and Engineering,2009,28(3):467-474.
[2]吉随旺,唐永建,胡德贵,等.四川省汶川地震灾区干线公路典型震害特征分析[J].岩石力学与工程学报,2009,28(6):1250-1260.JI Suiwang,TANG Yongjian,HU Degui,et al.Analysisof Typical Seismic Damages of Highways in WenchuanEarthquake-induced Hazard Areas in Sichuan Province[J].Chinese Journal of Rock Mechanics andEngineering,2009,28(6):1250-1260.
[3]周海涛.公路工程抗震减灾技术回顾与展望[J].公路交通科技,2010,27(9):39-43.ZHOU Haitao.Review and Prospect of EarthquakeResistance and Disaster Mitigation Technology of HighwayEngineering[J].Journal of Highway and TransportationResearch and Development,2010,27(9):39-43.
[4]徐光兴,姚令侃,高召宁,等.边坡动力特性与动力响应的大型振动台模型试验研究[J].岩石力学与工程学报,2008,27(03):624-632.XU Guang-xing,YAO Lingkan,GAO Zhaoning,et al.Large-scale Shaking Table Model Test Study on DynamicCharacteristics and Dynamic Responses of Slope[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(03):624-632.
[5]刘小生,王忠宁,汪小刚,等.面板坝大型振动台模型试验与动力分析[M].北京:中国水利水电出版社,2005.LIU Xiaosheng,WANG Zhongning,WANG Xiaogang,etal.Large-scale Shaking Table Model Test and DynamicAnalysis of Core Faceplate Rockfill Dam[M].Beijing:China Water Power Press,2005.
[6]凌贤长,郭明珠,王东升,等.液化场地桩基桥梁震害响应大型振动台模型试验研究[J].岩土力学,2006,27(1):7-10.LING Xianzhang,GUO Mingzhu,WANG Dongsheng,etal.Large-scale Shaking Table Model Test of SeismicResponse of Bridge of Pile Foundation in Ground ofLiquefaction[J].Rock and Soil Mechanics,2006,27(1):7-10.
[7]翟阳,韩国城.边坡对土坝稳定影响的振动台模型试验研究[J].烟台大学学报:自然科学与工程版,1996(4):67-71.ZHAI Yang,HAN Guocheng.Shaking Table Test onEffect of Slope on Stability of Fill Dam[J].Journal ofYantai University:Natural Science and EngineeringEdition,1996(4):67-71.
[8]杨林德,杨超,季倩倩,等.地铁车站的振动台试验与地震响应的计算方法[J].同济大学学报:自然科学版,2003,31(10):1135-1140.YANG Linde,YANG Chao,JI Qianqian,et al.ShakingTable Test and Numerical Calculation on Subway StationStructures in Soft Soil[J].Journal of Tongji University:Natural Science Edition,2003,31(10):1135-1140.
[9]楼梦麟,王文剑,马恒春,等.土-桩-结构相互作用体系的振动台模型试验[J].同济大学学报:自然科学版,2001,29(7):763-768.LOU Menglin,WANG Wenjian,MA Hengchun,et al.Study on Soil-pile-structure Interaction System by ShakingTable Model Test[J].Journal of Tongji University:Natural Science Edition,2001,29(7):763-768.
[10]伍小平,孙利民,胡世德,等.振动台试验用层状剪切变形土箱的研制[J].同济大学学报:自然科学版,2002,30(7):781-785.WU Xiaoping,SUN Limin,HU Shide,et al.Developmentof Laminar Shear Box Used in Shaking Table Test[J].Journal of Tongji University:Natural Science Edition,2002,30(7):781-785.
[11]李德寅,王邦楣,林亚超.结构模型试验[M].北京:科学出版社,1996.LI Deyin,WANG Bangmei,LIN Yachao.Structure ModelTest[M].Beijing:Science Press,1996.
[12]左东启.模型试验的理论和方法[M].北京:中国水利水电出版社,1984.ZUO Dongqi.The Theories and Methods for the Model Test[M].Beijing:China Water Power Press,1984.
[13]迟世春,林少书.结构动力模型试验相似理论及其验证[J].世界地震工程,2004,20(4):11-20.CHI Shichun,LIN Shaoshu.Validation of Similitude Lawsfor Dynamic Structural Model Test[J].World EarthquakeEngineering,2004,20(4):11-20.
[14]范书立,陈建云,王建涌,等.高拱坝振动台地震破坏试验研究及数值仿真[J].岩石力学与工程学报,2009,28(3):467-474.FANG Shuli,CHEN Jianyun,WANG Jianyong,et al.Experimental Study and Numerical Simulation for SeismicFailure of High Arch Dam on Shaking Table[J].ChineseJournal of Rock Mechanics and Engineering,2009,28(3):467-474.
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