水平地震作用下加筋格宾挡土墙动力特性试验研究
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摘要
通过大型的模型试验,研究了以红砂岩为填料在水平地震作用下加筋格宾挡土墙的动力特性。双绞合六边形金属格宾网由PVC包裹,并镀锌防腐,网面单元尺寸为80 mm×100 mm。输入地震波采用ELCE_NS地震波和HACHI_EW地震波,峰值分别为0.342g和0.183g。试验得出了加筋格宾挡墙在不同峰值的水平地震激励下的第一层、第三层、第五层墙顶面处的水平加速度、竖向加速度、水平动位移、竖向动位移峰值响应和沿墙高方向动应力峰值响应。通过对加筋格宾挡土墙的结构分析和抗震试验,可以得出加筋格宾挡土墙为优良的抗震结构,这为加筋格宾挡土墙的抗震设计提供依据。
Large model tests are conducted on reinforced gabion walls filled with red sandstone under horizontal seismic loading to investigate the dynamic response of walls.PVC-coated heavy galvanized of double twisted hexagonal wire mesh is used in the tests,and the cells of wire mesh specimens have a dimension of 80 mm×100 mm.Input seismic waves are ELCE_NS and HACHI_EW,and the peaks are 0.342g and 0.183g respectively.The horizontal acceleration,vertical acceleration,dynamic horizontal displacement,dynamic vertical displacement,and dynamic stress peaks response of the first layer,the third layer,the fifth layer of reinforced gabion walls are achieved in the model tests under different peaks of horizontal earthquake incentives.The reinforced gabion walls are proved to be excellent aseismatic structures by the structural analyses and aseismatic experiments.The test results provide a reasonal basis for the aseismatic design of reinforced gabion walls.
Large model tests are conducted on reinforced gabion walls filled with red sandstone under horizontal seismic loading to investigate the dynamic response of walls.PVC-coated heavy galvanized of double twisted hexagonal wire mesh is used in the tests,and the cells of wire mesh specimens have a dimension of 80 mm×100 mm.Input seismic waves are ELCE_NS and HACHI_EW,and the peaks are 0.342g and 0.183g respectively.The horizontal acceleration,vertical acceleration,dynamic horizontal displacement,dynamic vertical displacement,and dynamic stress peaks response of the first layer,the third layer,the fifth layer of reinforced gabion walls are achieved in the model tests under different peaks of horizontal earthquake incentives.The reinforced gabion walls are proved to be excellent aseismatic structures by the structural analyses and aseismatic experiments.The test results provide a reasonal basis for the aseismatic design of reinforced gabion walls.
引文
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[2]刘华北.水平与竖向地震作用下土工格栅加筋土挡墙动力分析[J].岩土工程学报,2006,28(5):594–599.(LIU Hua-bei.Analysis on seismic behavior of geogrid-reinforced retaining wall subjected to horizontal and vertical excitations[J].Chinese Journal of Geotechnical Engineering,2006,28(5):594–599.(in Chinese))
[3]刘华北.地震作用下模块式面板土工合成材料加筋土挡墙的内部稳定分析[J].岩土工程学报,2008,30(2):278–283.(LIU Hua-bei.Internal stability analysis of segmental geosynthetic-reinforced soil retaining walls subjected to seismic loading[J].Chinese Journal of Geotechnical Engineering,2008,30(2):278–283.(in Chinese))
[4]杨有海.地震作用下加筋土挡墙稳定性分析[J].兰州铁道学院学报(自然科学版),2002,21(4):9–11.(YANG You-hai.Stability analysis on the reinforced earth retaining wall under earthquake loadings[J].Journal of Lanzhou Railway University(Natural Sciences),2002,21(4):9–11.(in Chinese))
[5]甘亚南,李庆华,王冬梅.双面加筋挡土墙结构在高烈度地震区应用的研究[J].焦作工学院学报(自然科学版),2004,23(4):310–314.(GAN Ya-nan,LI Qing-hua,WANG Dong-mei.Application of double-sided ribbed earthen screen wall in earthquake zone of high earthquake intensity[J].Journal of Jiaozuo Institute of Technology(Natural Science),2004,23(4):310–314.(in Chinese))
[6]杨果林,李海深,王永和.加筋土挡墙动力特性模型试验与动力分析[J].土木工程学报,2003,36(6):105–110.(YANG Guo-lin,LI Hai-shen,WANG Yong-he.Model test on reinforced earth retaining wall under cyclic loading[J].China Civil Engineering Journal,2003,36(6):105–110.(in Chinese))
[7]李海深,杨果林,邹银生.加筋土挡土墙动力特性分析[J].中国公路学报,2004,17(2):28–32.(LI Hai-shen,YANG Guo-lin,ZOU Yin-sheng.Analysis of dynamic character of reinforced earth retaining wall[J].China Journal of Highway and Transport,2004,17(2):28–32.(in Chinese))
[8]LING H I,LIU H,MOHRI Y.Parametric studies on the behavior of reinforced soil retaining walls under earthquake loading[J].Journal of Engineering Mechanics,ASCE,2005,131(10):1056–1065.
[9]LING H I,MOHRI Y,LESHCHINSKY D,et al.Large-scale shaking table tests on modular-block reinforced-soil retaining walls[J].Journal of Geotechnical and Geoenvironmental Engineering,ASCE,2005,131(4):465–476.
[10]LIU H,LING H I.A unified elastoplastic-viscoplastic bounding surface model of geosynthetics and its applications to GRS-RW analysis[J].Journal of Engineering Mechanics,ASCE,2007,133(7):801–815.
[11]LING H I,LIU Hua-bei,KALIAKIN V N.Analyzing dynamic behavior of geosynthetic-reinforced soil retaining walls[J].Journal of Engineering Mechanics,ASCE,2004,130(8):911–920.
[12]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.(GB 50011—2001 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2001.(in Chinese))
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