地震作用下大型渡槽动力响应分析研究
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摘要
针对大型渡槽在地震作用下的结构响应问题,基于水工标准谱人工合成符合频谱关系的地震动,以豪斯纳尔(HOUNSER)理论简化槽内水体与槽壁的流固耦合作用,建立了大型渡槽流固耦合动力学分析模型,并以人工地震动和按比例法调整的ELCentro波作为输入,采用三维有限元及时程分析技术,对不同过水量下结构的动应力及动位移进行了计算分析。结果表明,人工地震动引起的响应比ELCentro波引起的大,同时得出不同过水量下槽体结构动应力及动位移的变化规律,为同类工程设计提供理论依据和参考。
In this paper,aiming at the dynamic response of the large scale aqueduct under seismic action,the model for the dynamics analysis of fluid-solid interaction(FSI) of large scale aqueduct is set up based on the artificial earthquake which conforms the frequency spectrum in the standard spectrum of hydro-structure,and the FSI between the water body in the aqueduct and the wall of the aqueduct is simplified adopting HOUSNER theory.With the artificial earthquake and ELCentro wave adjusted according to proportion method as the wave input drivers,and 3D FEM and the timing analysis technique,the dynamic stress and dynamic displacement of the structure under different discharges are calculated and analyzed.The results indicated that the response caused by artificial earthquake is larger than that caused by ELCentro wave.And the conclusion of the variation law of the dynamic stress and dynamic displacement of the aqueduct structure under different quantities of discharge is also drawn,which provides theoretical basis and reference for the design of similar projects.
In this paper,aiming at the dynamic response of the large scale aqueduct under seismic action,the model for the dynamics analysis of fluid-solid interaction(FSI) of large scale aqueduct is set up based on the artificial earthquake which conforms the frequency spectrum in the standard spectrum of hydro-structure,and the FSI between the water body in the aqueduct and the wall of the aqueduct is simplified adopting HOUSNER theory.With the artificial earthquake and ELCentro wave adjusted according to proportion method as the wave input drivers,and 3D FEM and the timing analysis technique,the dynamic stress and dynamic displacement of the structure under different discharges are calculated and analyzed.The results indicated that the response caused by artificial earthquake is larger than that caused by ELCentro wave.And the conclusion of the variation law of the dynamic stress and dynamic displacement of the aqueduct structure under different quantities of discharge is also drawn,which provides theoretical basis and reference for the design of similar projects.
引文
[1]徐建国,陈淮,王博,等.考滤液固动力相互作用的大型渡槽地震响应研究[J].土木工程学报,2005,38(5):67-73.
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[3]吴轶,莫海鸿,杨春.排架-渡槽-水三维耦合体系地震响应分析[J].水利学报,2005,36(3):280-285.
[4]李声平,彭翠玲,吴杰芳.大型U型双槽结构动力分析[J].长江科学院院报,2005,22(4):68-71.
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[8]高玉峰,张健.地震动危险性分析研究[M].北京:科学出版社,2007.
[9]SL203—97,水工建筑抗震设计规范[S].
[10]胡聿贤.地震工程学[M].北京:地震出片社,2006.
[2]李涛峰,白新理,张多新.大型渡槽结构动力响应分析[J].南水北调与水利科技,2007,5(4):79-82.
[3]吴轶,莫海鸿,杨春.排架-渡槽-水三维耦合体系地震响应分析[J].水利学报,2005,36(3):280-285.
[4]李声平,彭翠玲,吴杰芳.大型U型双槽结构动力分析[J].长江科学院院报,2005,22(4):68-71.
[5]高兑现,李正农,唐永胜,等.渡槽结构地震反应分析[J].水利发电学报,2004,23(5):40-43.
[6]李建华,李杰.考虑反应谱变异特性的人工合成地震波[J].同济大学学报,2002,30(9):1038-1043.
[7]杜修力,陈厚群.地震动随机模拟及其参数确定方法[J].地震工程与工程振动,1994,14(4):1-12.
[8]高玉峰,张健.地震动危险性分析研究[M].北京:科学出版社,2007.
[9]SL203—97,水工建筑抗震设计规范[S].
[10]胡聿贤.地震工程学[M].北京:地震出片社,2006.
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