强震区桥台滑移变位特性及趋势研究
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摘要
在充分总结已有的桥台位移计算理论的基础上,以Newmark滑块及Zeng和Steedman转动块理论为基础,分别建立了地震下桥台滑移位移、转动位移以及滑移与转动相互耦合位移的计算模型,提出了台体位移的计算方法。最后根据此计算方法分别分析了位移指数、滑移位移及位移分量百分比等指标在不同地震烈度下的变化趋势,以量化方式衡量了桥台的抗震性能。为研究强震区桥台抗震提供了新的可行性思路。
After summaring the existing abutment displacement computation theory,the model of the bridge abutment sliding displacement,rotation displacement and the mixture of sliding and rotation displacement in earthquake was established based on Newmark,Zeng and Steedman rotational slider block theory;a compuation method of platform displacement was proposed.The change trend of displacement index,sliding displacement and the percentage of displacement under different seismic in ten sity was analyzed.Performance of the abutment was measured through quantizaiton which could provide new feasible ideas for seismic performance of abutment design in meizosesmal areas.
After summaring the existing abutment displacement computation theory,the model of the bridge abutment sliding displacement,rotation displacement and the mixture of sliding and rotation displacement in earthquake was established based on Newmark,Zeng and Steedman rotational slider block theory;a compuation method of platform displacement was proposed.The change trend of displacement index,sliding displacement and the percentage of displacement under different seismic in ten sity was analyzed.Performance of the abutment was measured through quantizaiton which could provide new feasible ideas for seismic performance of abutment design in meizosesmal areas.
引文
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[2]庄建琦,崔鹏,葛永刚.5.12汶川地震崩塌滑坡分布特征及影响因子评价:以都江堰至汶川公路沿线为例[J].地质科技情报,2009,28(2):16-22.
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[4]张鹏,陈新民,王旭东.近断层地震动与汶川地震灾区滑坡破坏特征分析[J].南京工业大学学报,2009,31(1):55-59.
[5]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009.
[6]何度心.桥台抗震设计的理论与方法[J].世界地震工程,1991(3):1-15.
[7]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报,2007,26(12):2385-2394.
[8]吕艳,齐怀恩.桥台抗滑移的稳定可靠度[J].公路,2002(1):38-39.
[9]李德武,梁波,韩文峰.桥台岸坡滑移地震稳定性分析[J].岩石力学与工程学报,2003(Z2):2813-2818.
[10]RobertH,Dinand A,GerardAM,etal.Influenceofearthquakeson the stability of slopes[J].Engineering Geology,2007,91(1):4-15.
[11]吴世明.土动力学[M].北京:中国建筑工业出版社,2000.
[12]祁生文,伍法权,严福章,等.岩质边坡动力反应分析[M].北京:科学出版社,2007.
[13]Scholl R E,King J L.Strong ground motion simulation and earth-quake engineering applications[M].California:USA EarthquakeEngineering Research Institute,1985.
[14]许年春,石维力,石东虹.结构动力有限元程序设计地震作用下边坡动力系数有限元分析[J].地下空间与工程学报,2008,4(6):1006-1010.
[15]Conte J P,Pister K S,Mahin S A.Influence of the earthquakeground motion process and structural properties on response char-acteristics of simple structures[R].Berkeley:Earthquake Engi-neering Research Center,1990.
[16]董志高,吴继敏,王文远,等.地震作用崩塌堆积体边坡稳定性分析[J].水利水电科技进展,2006,26(5):37-40.
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