渡槽结构横向动力响应分析
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摘要
结合某渡槽安全鉴定工作,建立单跨渡槽结构在设计水位和无水两种工况下的ANSYS三维有限元模型。选用Housner流-固耦合模型模拟了槽内水体与槽体侧壁之间的相互作用,并设定槽墩高度为8.3,10.3,12.3和14.3 m,分别进行模态分析和动力响应分析,以观察在不同槽墩高度下渡槽结构的动力响应(应力、位移和速度)变化。分析结果表明:渡槽结构在设计水位工况下的自振频率小于结构在无水工况下的自振频率;随着槽墩高度的增加,结构在设计水位工况和无水工况下的自振频率均呈减小的趋势,而槽墩顶部、槽体跨中及槽体顶部关键点处的动力响应值有总体增大的趋势;但渡槽结构不同位置的响应值不同,在地震作用下,高墩渡槽的动力响应值总体大于矮墩渡槽的动力响应值。
For safety appraisal of an aqueduct,an ANSYS three-dimensional finite element model of a single-span aqueduct structure has been developed with design water level and without water. The fluid-solid interaction Housner model is selected to simulate the interaction between water and the aqueduct wall and different pier heights of the aqueduct are set: 8. 3 m,10. 3 m,12. 3 m,14. 3 m respectively. The dynamic response of the aqueduct structure under different pier heights( stress,displacement,velocity) based on modal analysis and dynamic analysis is observed. Analysis results show that the natural vibration frequencies of the aqueduct structure under the design water level are less than those without water. With increase of the pier height of the aqueduct,the frequencies of the structure show the trend of decrease; the dynamic response values of the key points of the top of the pier,the midspan and the top of the mid-span have the tendency of increase; however,the dynamic response values of the different position of the aqueduct structure are different,therefore,the dynamic response values of the high-pier aqueduct is generally greater than that of the short-pier aqueduct under the practical conditions of earthquake.
引文
[1]季日臣,夏修身,陈尧隆.水体晃荡作用对渡槽横向抗震影响的研究[J].水力发电学报,2007,26(6):30-34.(JI Richen,XIA Xiu-shen,CHEN Yao-long.Research on influence of water shake acting on aqueduct transverse seismic response[J].Journal of Hydroelectric Engineering,2007,26(6):30-34.(in Chinese))
    [2]张多新,王清云,白新理.大型渡槽结构动力学研究进展[J].自然灾害学报,2011,20(4):22-30.(ZHANG Duo-xin,WANG Qing-yun,BAI Xin-li.Research progress in structural dynamics of large scale aqueduct[J].Journal of Natural Disasters,2011,20(4):22-30.(in Chinese))
    [3]王海萍,倪修全,吴军中.考虑流固耦合的大型渡槽动力分析[J].水电能源科学,2013,31(10):90-93.(WANG Haiping,NI Xiu-quan,WU Jun-zhong.Dynamic analysis of large-scale aqueduct considering fluid solid coupling[J].Water Resources and Power,2013,31(10):90-93.(in Chinese))
    [4]居荣初,曾心传.弹性结构与液体的耦联振动理论[M].北京:地震出版社,1983:115-122.(JU Rong-chu,ZENG Xinchuan.Elastic structure with fluid vibration theory[M].Beijing:Earthquake Press,1983:115-122.(in Chinese))
    [5]李彦军,王贺,吴迪.大型渡槽结构抗震分析研究[J].人民黄河,2010,32(1):100-102.(LI Yan-jun,WANG He,WU Di.Large-scale aqueduct structure seismic analysis[J].Yellow River,2010,32(1):100-102.(in Chinese))
    [6]季日臣,苏小凤,严娟.水体质量对大型梁式渡槽横向抗震性能影响研究[J].地震工程工程学报,2013,35(3):569-574.(JI Ri-Chen,SU Xiao-feng,YAN Juan.Transverse seismic performance of beam aqueduct considering water mass influence[J].China Earthquake Engineering Journal,2013,35(3):569-574.(in Chinese))
    [7]刘云贺,胡宝柱,闰建文,等.Housner模型在渡槽抗震计算中的适用性[J].水利学报,2002(9):94-99.(LIU Yun-he,HU Bao-zhu,YAN Jian-Wen,et al.Applicability of Houser model to aseismic characteristics calculation of aqueduct[J].Journal of Hydraulic Research,2002(9):94-99.(in Chinese))
    [8]张伯艳,邓迎,李德玉.渡槽抗震计算中几个关键问题的简化处理方法[J].南水北调与水利科技,2005,3(2):46-48.(ZHANG Bo-yan,DENG Ying,LI De-yu.Simplification treatment of some key problems in aqueduct aseismic calculation[J].South-to-North Water Transfers and Water Science&Technology,2005,3(2):46-48.(in Chinese))
    [9]周浩.大型渡槽结构三维地震碰撞反应分析[D].郑州:郑州大学,2013.(ZHOU Hao.Three-dimensional seismic pounding response analysis of large-scale aqueduct structures[D].Zhengzhou:Zhengzhou University,2013.(in Chinese))
    [10]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007:378-384.(WANG Xin-min.ANSYS engineering structure numerical simulation[M].Beijing:China Communication Press,2007:378-384.(in Chinese))
    [11]谢旭.桥梁结构地震响应分析与抗震设计[M].北京:人民交通出版社,2006:20-23.(XIE Xu.Bridge structure seismic response analysis and seismic design[M].Beijing:China Communication Press,2006:20-23.(in Chinese))
    [12]包陈,王呼佳.ANSYS工程分析进阶实例[M].北京:中国水利水电出版社,2009:249-253.(BAO Chen,WANG Hujia.Examples of ANSYS engineering analysis[M].Beijing:China Water Power Press,2009:249-253.(in Chinese))
    [13]罗如登,叶梅新,莫朝庆.桥梁支座水平静力约束方向抗震中的弹簧刚度取值方法对比研究[J].铁道科学与工程学报,2008,5(2):23-28.(LUO Ru-deng,YE Mei-xin,MO Chao-qin.The comparison study on valuing method of the stiffness on the direction of horizontal static constraint of support in seismic finite element analysis on bridges[J].Journal of Railway Science and Engineering,2008,5(2):23-28.(in Chinese))
    [14]王博,李杰.大型渡槽结构模态分析[J].地震工程与工程振动,2000,20(3):60-66.(WANG Bo,LI Jie.Large scale aqueduct modal analysis[J].Earthquake Engineering and Engineering Vibration,2000,20(3):60-66.(in Chinese))

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