地震作用下的地下结构侧面动土压力分析研究
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摘要
利用弹性有限元模型有效地分析了在地震作用下的地下结构侧面动土压力的影响因素。本文重点研究了墙体和土体的相对弯曲刚度,对于动土压力等效作用力的大小,以及位置的影响。结果表明墙体对上述的影响大于土体的影响。这一结果为修正地下结构的相对弯矩刚度公式和今后简化动土压力的公式提供了参考。之后研究四种特殊情况发现,刚性结构和硬土的动土压力最大;刚性结构和软土的动土压力最小。
Elastic finite element model is one of the effective analysis of underground structures under earthquake to determine the side earth pressure influence factor.This paper focuses on the wall and the relative flexibility stiffness of the soil,earth pressure resultant force,and the location of application force.The results show that the impact by the wall is greater than the impact by soil.This results provide a reference for correcting the relative underground structure earth pressure formula and simplify the formula for future.In special circumstances,the study have found that rigid structure and the stiff soil is the most affect on dynamic earth pressure;rigid and soft soil of the earth is the minimum dynamic earth pressure.
Elastic finite element model is one of the effective analysis of underground structures under earthquake to determine the side earth pressure influence factor.This paper focuses on the wall and the relative flexibility stiffness of the soil,earth pressure resultant force,and the location of application force.The results show that the impact by the wall is greater than the impact by soil.This results provide a reference for correcting the relative underground structure earth pressure formula and simplify the formula for future.In special circumstances,the study have found that rigid structure and the stiff soil is the most affect on dynamic earth pressure;rigid and soft soil of the earth is the minimum dynamic earth pressure.
引文
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[3]Jung,C.M.,Bobet,A.,and Fernandez,G.(2009).Analyticalsolution for the response of a flexible retaining structure with an e-lastic backfill.International Journal for Analytical and NumericalMethods in Geomechanis.In press.
[4]周健,董鹏,池永,等.软土地下结构的地震土压力分析研究[J].岩土力学,2004,25(4):6.
[5]Veletsos A S,Younan A H.Dynamic soil pressures on rigid verti-cal walls[J].earthquake engineering and structural dynamics,1994,23(2):275-301.
[6]陈景文,刘年华,刘钧耀,等.挡土墙背填土地表变形与侧土压力研究[J].岩土工程学报,2007,29(5):6.
[7]王立强,王元战,迟丽华,等.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):5.
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[7]Madabhushi,S.P.G.,and Zeng,X.(2007).“Simulating seismicresponse of cantilever retaining walls.”J.Geotech.Geoenviron.Eng.,133(5)5,39 549.
[8]Mononobe,N.and Matsuo,M.(1932).Experimental investiga-tion of lateral earth pressure during earthquakes,Earthquake Re-search Institute and Research Office of Public Works,884 902.
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[10]Seed,H.B.,and Whitman,R.V.(1970).“Design of earthretaining structures for dynamic loads.”Proc.,ASCE SpecialtyConf.on Lateral Stresses in the Ground and Design of Earth Retai-ning Structures,Vol.,1Cornell Univ.,Ithaca,N.Y.,103-147.
[11]Psarropoulos,PN.,Klonaris,G.and Gazetas,G.(2005),“Seismic earth pressures on rigid and flexible retainingwall,”Soildynamics and Earthquake Engineering,vol.25,pp 795-809.
[2]Jung,C.M.and Bobet,A.(2008).Seismic Earth Pressures Be-hind Retaining Walls:Effects of Rigid-body Motions.ASCEGeotechnical Earthquake Engineering and Soil Dynamics Confer-ence,GSP-18,1CD-ROM Proceedings,11 pp.
[3]Jung,C.M.,Bobet,A.,and Fernandez,G.(2009).Analyticalsolution for the response of a flexible retaining structure with an e-lastic backfill.International Journal for Analytical and NumericalMethods in Geomechanis.In press.
[4]周健,董鹏,池永,等.软土地下结构的地震土压力分析研究[J].岩土力学,2004,25(4):6.
[5]Veletsos A S,Younan A H.Dynamic soil pressures on rigid verti-cal walls[J].earthquake engineering and structural dynamics,1994,23(2):275-301.
[6]陈景文,刘年华,刘钧耀,等.挡土墙背填土地表变形与侧土压力研究[J].岩土工程学报,2007,29(5):6.
[7]王立强,王元战,迟丽华,等.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):5.
[6]Anderson,D.G.,Martin,G.R.,Lam,I.,and Wang,J.N.(2009).“Seismic analysis and design of retaining walls,buriedstructures,slopes,and embankments.”NCHRP Rep.61,1Transportation Research Board,Washington,D.C.
[7]Madabhushi,S.P.G.,and Zeng,X.(2007).“Simulating seismicresponse of cantilever retaining walls.”J.Geotech.Geoenviron.Eng.,133(5)5,39 549.
[8]Mononobe,N.and Matsuo,M.(1932).Experimental investiga-tion of lateral earth pressure during earthquakes,Earthquake Re-search Institute and Research Office of Public Works,884 902.
[9]Okabe,S.(1926).“General theory of earth pressures.”J.Ja-pan.Soc.Civil Eng.,12(1),123 134.
[10]Seed,H.B.,and Whitman,R.V.(1970).“Design of earthretaining structures for dynamic loads.”Proc.,ASCE SpecialtyConf.on Lateral Stresses in the Ground and Design of Earth Retai-ning Structures,Vol.,1Cornell Univ.,Ithaca,N.Y.,103-147.
[11]Psarropoulos,PN.,Klonaris,G.and Gazetas,G.(2005),“Seismic earth pressures on rigid and flexible retainingwall,”Soildynamics and Earthquake Engineering,vol.25,pp 795-809.
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