基于ANSYS的水闸-地基体系抗震分析
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摘要
在结构-地基体系动力有限元研究的基础上,针对闸底板结构特殊、受力条件复杂使得其抗震稳定分析难度较大的问题,以某水闸工程为例,考虑地震动水压力作用、闸室结构的空间耦联及闸室结构与地基相互作用的影响,利用通用有限元软件ANSYS对闸室与地基整体结构进行了抗震计算,并对比分析了反应谱法与时程分析法动力计算结果,同时对该水闸的安全稳定性进行了评价。结果表明,闸底板的转折部位承受拉应力较大,配筋及实际施工过程中应予以重点关注。反应谱法与时程分析法的动力分析结果具有一致性,但反应谱法对地基承载力计算的结果比时程分析的结果保守。
Based on structure and foundation system dynamic element study,the seismic response of a sluice structure and foundation system is conducted by the finite element software for solving seismic stability difficultly because of special floor structure and complex stress conditions. The effect of seismic water pressure,spatial coupling of sluice structure and the interaction of structure and foundation are considered. The results of obtained by the response spectrum method and the time history analysis are compared,meanwhile the security and stability of the system are evaluated. The results show that the large tensile stress are appeared in the turning parts of the sluice structure bottom and should pay more attention on the reinforcement and the actual construction process. In addition,the dynamic response spectrum method and time history analysis method has the consistency of the results,but the result of foundation bearing capacity calculated by the dynamic response spectrum are more conservative than what calculated by time history analysis.
Based on structure and foundation system dynamic element study,the seismic response of a sluice structure and foundation system is conducted by the finite element software for solving seismic stability difficultly because of special floor structure and complex stress conditions. The effect of seismic water pressure,spatial coupling of sluice structure and the interaction of structure and foundation are considered. The results of obtained by the response spectrum method and the time history analysis are compared,meanwhile the security and stability of the system are evaluated. The results show that the large tensile stress are appeared in the turning parts of the sluice structure bottom and should pay more attention on the reinforcement and the actual construction process. In addition,the dynamic response spectrum method and time history analysis method has the consistency of the results,but the result of foundation bearing capacity calculated by the dynamic response spectrum are more conservative than what calculated by time history analysis.
引文
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[2]朱庆华,顾美娟.水闸闸室抗震动力分析及措施[J].水电能源科学,2012,30(1):114-116.
[3]周宁.ANSYS APDL高级工程应用实例分析与二次开发[M].北京:中国水利水电出版社,2007.
[4]孔戈.盾构隧道地震响应分析及抗减震措施研究[D].上海:同济大学,2006.
[5]周建,白冰,徐建平.土动力学理论与计算[M].北京:中国建筑工业出版社,2001.
[6]贾冬.厚覆盖层上的水闸三维有限元静力分析和动力响应分析研究[D].南京:河海大学,2005.
[7]许新勇,康迎宾,罗全胜.洹河景观水闸工程抗震安全评价研究[J].人民黄河,2012,34(8):147-148.
[8]林皋.土—结构动力相互作用[J].世界地震工程,1991(1):4-21.
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