垃圾填埋场边坡动力响应时程分析
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摘要
随着城市化建设和新农村建设进程的提速,对环境的要求也更高。目前,设置垃圾填埋场仍是处置城市生活垃圾的一种行之有效且最常用的方法。填埋场边坡与其它自然边坡和人工边坡一样,也存在边坡稳定问题,针对锡塘垃圾填埋场边坡工程实际,基于时程分析法对填埋场边坡的动力响应进行了分析,采用等效线性化方法考虑垃圾填埋体的非线性动力响应特性。为充分反映地震动特性对填埋场动力响应的影响,地震动输入采用三条实测波和一条人工地震波。分析结果表明,不同地震波对填埋场地震响应有显著差异,在对实际填埋场抗震设计时,至少应选择两条实测波加一条人工合成地震波作为输入地震波,这样才能较好反映填埋场动力响应特性。
With the acceleration of urbanization and new rural construction process,environmental requirements are also raised. At present,building landfills to dispose of municipal solid waste is still an effective and most commonly used method. Landfill slopes have the same stability problems with other natural and manmade slopes. According to the engineering practice of municipal solid waste landfills,based on the analysis of time history for dynamic response of landfills slope,the equivalent linearization method was used to study the non-linear dynamic response characteristics of the waste in the landfill. In order to fully reflect the impact of the seismic motion characteristics on the dynamic response of the landfill,three actual recorded waves and an synthetic wave were input as seismic motions. The result indicates that there are significant differences on the seimic response of landfills according to the input of different seismic waves. When conducting seismic design of the actual landfill sites,there should be at least 2 actual waves and one synthetic wave as input waves to better reflect the landfill dynamic response characteristics.
With the acceleration of urbanization and new rural construction process,environmental requirements are also raised. At present,building landfills to dispose of municipal solid waste is still an effective and most commonly used method. Landfill slopes have the same stability problems with other natural and manmade slopes. According to the engineering practice of municipal solid waste landfills,based on the analysis of time history for dynamic response of landfills slope,the equivalent linearization method was used to study the non-linear dynamic response characteristics of the waste in the landfill. In order to fully reflect the impact of the seismic motion characteristics on the dynamic response of the landfill,three actual recorded waves and an synthetic wave were input as seismic motions. The result indicates that there are significant differences on the seimic response of landfills according to the input of different seismic waves. When conducting seismic design of the actual landfill sites,there should be at least 2 actual waves and one synthetic wave as input waves to better reflect the landfill dynamic response characteristics.
引文
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[18]张锋春,梁力,戴玉买.Ansys在排土场动力时程分析中的应用[J].金属矿山,2009,399(9):160-164.
[2]邓学晶,孔宪京,刘君.城市垃圾填埋场的地震响应及稳定性分析[J].岩土力学,2007,28(10):2095-2100.
[3]刘红帅,薄景山,刘德东,等.岩土边坡地震稳定性分析研究评述[J].地震工程与工程振动,2005,25(1):164-171.
[4]周健,贾敏才.固体废弃物堆埋场抗震稳定性研究现状[J].世界地震工程,2001,17(3):38-42.
[5]刘汉龙,费康,高玉峰.边坡地震稳定时程分析方法[J].岩土力学,2004,24(4):553-556.
[6]祁生文.边坡动力响应分析及应用研究[D].北京:中国科学院地质与地球物理研究所,2002.
[7]栾茂田,李湛,范庆来.土石坝拟静力稳定性分析与坝坡地震滑移量估算[J].岩土力学,2007,28(2):224-230.
[8]帅海乐,冯世进,詹黔花,等.垃圾填埋场的地震响应特性分析[J].振动与冲击,2013,32(4):75-79.
[9]张国栋,刘学,金星,等.基于有限单元法的岩土边坡动力稳定分析及评价方法研究进展[J].工程力学,2008,25(A02):44-52.
[10]陈国兴.岩土地震工程学[M].北京:科学出版社,2007.
[11]李勇.城市固体废弃物填埋场边坡地震响应分析[J].水利与建筑工程学报,2010,8(2):30-33.
[12]Kondner R L.Hyperbolic stress-strain response:cohesive soil[J].Journal of the Soil Mechanics and Foundation Division,ASCE,1963,89(S1):115-143.
[13]Hardin B O,Drnevich V P.Shear modulus and damping in soils[J].Journal of the Soil Mechanics and Foundation Division,ASCE,1972,98(7):667-692.
[14]冯世进,陈云敏,孔宪京,等.城市固体废弃物动力特性试验研究[J].岩土工程学报,2005,27(7):750-754.
[15]张国栋,李勇.城市固体废弃物的容重研究[J].环境科学与技术,2008,31(6):204-206.
[16]胡聿贤,何训.考虑相位谱的人造地震动反应谱拟合[J].地震工程与工程振动,1986,6(2):37-51.
[17]赵凤新,张郁山.拟合峰值速度与目标反应谱的人造地震动[J].地震学报,2006,28(4):429-437.
[18]张锋春,梁力,戴玉买.Ansys在排土场动力时程分析中的应用[J].金属矿山,2009,399(9):160-164.
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