拱坝横缝影响及有效抗震措施的研究
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摘要
大量研究结果和某些拱坝的地震震害表明,横缝对拱坝的地震响应有很大的影响。通过采用非光滑方程组方法以及考虑碰撞时刻动量、动能守恒来模拟横缝所引起的动接触问题,同时为了提高计算效率,采用隐-显式积分方法对坝-基系统的动力平衡方程进行求解。针对在拱坝中上部配筋这一抗震措施,也作了探讨。通过对小湾拱坝的分析,为高拱坝工程抗震措施的选择提供技术依据。
Several researches and the seismic response of some arch dams indicate that the contraction joints have great influence on the seismic response of arch dams. In this paper, the dynamic contact problem resulted from the contraction joints is simulated by the non-smooth equation method combined with the consideration of the balance of momentum and kinetic energy at the impact time. Implicit-explicit integration scheme is used for the equilibrium equation of the arch dam-foundation system. The effect of seismic belt in arch dam is also studied. The seismic analysis of Xiaowan arch dam provids technique basis for the choice of earthquake-resistant measures to high arch dam.
Several researches and the seismic response of some arch dams indicate that the contraction joints have great influence on the seismic response of arch dams. In this paper, the dynamic contact problem resulted from the contraction joints is simulated by the non-smooth equation method combined with the consideration of the balance of momentum and kinetic energy at the impact time. Implicit-explicit integration scheme is used for the equilibrium equation of the arch dam-foundation system. The effect of seismic belt in arch dam is also studied. The seismic analysis of Xiaowan arch dam provids technique basis for the choice of earthquake-resistant measures to high arch dam.
引文
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[2] FenvesGL,MojtahediSandReimerRB.Effectofcontractionjointsonearthquakeresponseofanarchdam[J].JournalofStructuralEngineering,ASCE,1992,118(4):1039-1055.
[3] FenvesGL,MojtahediSandReimerRB.Parameterstudyofjointopeningeffectsonearthquakeresponseofarchdams[R].ReportNo.UCB/EERC-92/05,EarthquakeEngineeringResearchCenter,Univ.ofCalif.atBerkeley,Apr.1992.
[4] LauDT,NoruziaanB.RazaqpurAG.Modelingofcontractionjointandshearslidingeffectsonearthquakeresponseofarchdams[J].EarthquakeEngng.Struc.Dyn.,1998,27(10):1013-1029.
[5] AzmiM,PaultreP.Three-dimensionalanalysisofconcretedamsincludingcontractionjointnon-linearity[J].EngineeringStructure,2002,24(7):757-771.
[6] LotfiV,EspandarR.Aninvestigationofjointsbehaivorinseismicresponseofarchdams[J].JournalofEletricStructuralEngineering,2002,(1):17-31.
[7] AhmadiMT,IzadiniaM,BachmannH.Adiscretecrackjointmodelfornonlineardynamicanalysisofconcretearchdam[J].ComputersandStructures,2001,79(4):403-420.
[8] 徐艳杰,张楚汉,金峰.非线性拱坝-地基动力相互作用的FE-BE-IBE模型[J].清华大学学报(自然科学版),1998,38(11):29-36.
[9] 徐艳杰,张楚汉,王光纶,金峰.小湾拱坝模拟实际横缝间距的非线性地震反应分析[J].水利学报,2001,(4):68-74.
[10] 徐艳杰.横缝配筋的拱坝地震非线性模型与无限地基影响研究[D].北京:清华大学,1999.
[11] 清华大学水利水电工程系.小湾拱坝动力非线性分析及抗震措施研究报告[R].北京:清华大学,2003.
[12] HallJF.EfficientNon-linearseismicanalysisofarchdams[J].EarthquakeEngng.Struc.Dyn.,1998,27(12):1425-1444.
[13] 涂劲,陈厚群,杜修力.高拱坝地震反应分析中横缝模拟方案研究[J].水力发电学报,2001,(3):18-25.
[14] 涂劲.有缝界面的混凝土高坝-地基系统非线性地震波动反应分析[D].北京:中国水利水电科学研究院,1999.
[15] 陈国庆,陈万吉,冯恩民.三维接触问题的非线性互补变分原理及算法[J].中国科学(A辑),1995,25(11):1181-1190.
[16] ChristensenPW,KlarbringA,PangJS,Str mbergN.Formulationandcomparisonofalgorithmsforfrictionalcontactproblems[J].Int.J.Num.Meth.Engrg.,1998,42:145-173.
[17] HughesTJR,TaylorRL,SackmanJL,CurnierA,KanoknukulchaiW.Afiniteelementmethodforaclassofcontact-impactproblem[J].CompMethApplMechEngrg,1976,8(3):249-276.
[18] ChenWH,YehJT.Three-dimensionalfiniteelementanalysisofstaticanddynamiccontactproblemswithfriction[J].CompStruc.,1990,35(5):541-552.
[19] 廖振鹏.工程波动理论导引[M].北京:科学出版社,1996
[20] HughesTJR,LiuWK.Implicit-explicitfiniteelementsintransientanalysis:stabilitytheory[J].J.Appl.Mech.,1978,45(6):371-374.
[21] 胡志强.考虑坝-基动力相互作用的有横缝拱坝地震响应分析[D],大连:大连理工大学,2003.
[22] WielandM.Earthquakesafetyofconcretedamsandseismicdesigncriteriaformajordamprojects[R].
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