建筑物下砂土地震液化分区特征数值模拟研究

英文篇名：Numerical simulation of sandy soil liquefaction zoneing for unfree field under earthquake
中文刊名：岩土力学
英文刊名：Rock and Soil Mechanics
作者：孙恒矗 ; 周小文 ; 蔡元林
英文作者：SUN Heng-chu1 ; 2 ; ZHOU Xiao-wen1 ; 2 ; CAI Yuan-lin3 (1. College of Architecture and Civil Engineering ; South China University of Technology ; Guangzhou 510640 ; China ; 2. National Key Laboratory of Subtropical Architecture Science ; Guangzhou 510000 ; China ; 3. Guangdong Planning and Design Institute for Shipping ; Guangzhou 510050 ; China)
中文关键词：砂土 ; 液化 ; 非自由场地 ; 动力反应分析
英文关键词：sand ; liquefaction ; unfree ground ; dynamic response analysis
出版日期：2007-10-10
机构：华南理工大学建筑学院;亚热带建筑科学国家重点实验室;广东省航运规划设计院;
年：2007
期：S1
出版单位：岩土力学

摘要

基于动力有限元反应分析,对存在于建筑物下的非自由场地的液化特性进行了研究。通过多种工况的计算,探讨了建筑物刚度、宽度和荷载大小对液化区分布的影响。以往一般认为建筑物下的砂土难于液化,而由计算结果及分析,可先实际情况并非这样简单。建筑物基底以下存在易于液化的"V"字型区域,该区域形态与建筑物的刚度、宽度和荷载大小都有密切关系。
For unfree ground with existing building,the sandy soil liquefaction potential under earthquake is studied by using numerical dynamic response analysis. The influence of building stiffness,width and building weight on liquefaction zone distribution is investigated through various conditions of calculation. In conventional cognition,the sand under building is difficult to liquefy. However,it is demonstrated by this numerical calculation that the actual situation may not always be always so simple. A zone with the shape of character "V" under building shows high potential of liquefaction,and is closely related to the building stiffness,width and building weight.

引文

[1]Finn W D,et al.Analysis of pore-water pressure in seismic centrifuge tests[A].Soil Dynamics and Liquefaction[M],[s.l.]:Elsevier,1987:71-85.
    [2]Popescu R.Centrifuge Validation of a Numerical Model for Dynamic Soil Liquefaction[J].Soil Dynamics and Earthquake Engineering,1993,l2(2):73-90.
    [3]Adalier K et al.Liquefaction in Embankment Foundation Soils[A].Proceedings of4th Japan-U.S.Workshop on Earthquake Resistant Design of Lifeline Facilities and Countermeasures for Soil Liquefaction[C].Honolulu:[s.n.],1995.493-508.
    [4]刘惠珊,乔太平.地基与工业建筑抗震[M].北京:地震出版社,1984.
    [5]陈文化,门福录,景立平,等.有建筑物存在的饱和砂土地基液化振动台模拟实验研究[J].地震工程与工程振动,1998,18(4):54-60.
    [6]门福录,崔杰,景立平,等.建筑物饱和砂土地基地震液化判别的简化分析方法[J].水利学报,1998,5:33-38.
    [7]Meek J W,Wolf J P.Cone models for homogeneous soil[J].Journal of the Geotechnical Engineering Division,American Society of Civil Engineering,1992,118:667-685.