坝体接缝的线性互补模型及横缝对拱坝工作性态的影响

英文篇名：Linear complementary model for joints and the influence of joint on behavior of arch dam
中文刊名：水利学报
英文刊名：Journal of Hydraulic Engineering
作者：孙林松 ; 王德信
英文作者：SUN Linsong1 ; WANG Dexin2(1Yangzhou University ; Yangzhou225009 ; China ; 2Hohai University ; Nanjin\ 210098 ; China)
中文关键词：接缝 ; 线性互补 ; 有限元 ; 初始间隙 ; 拱坝
英文关键词：joint ; linear complementary model ; FEM ; initial gap ; arch dam ; Xiaowan Project
出版日期：2003-07-28
机构：扬州大学水利与建筑工程学院,河海大学土木工程学院江苏扬州　225009 ,江苏南京　210024
年：2003
期：07
出版单位：水利学报

摘要

借助罚因子建立了坝体接缝的增量本构模型,导出了互补虚功方程,采用有限元离散建立了坝体接缝的线性互补模型,该模型可以较好的反映接缝的接触条件,并提高计算效率。结合小湾拱坝对横缝及其初始间隙对拱坝工作性态的影响进行了分析,结果表明,如果横缝没有初始间隙,则它对坝体工作性态没有多大的影响,但当横缝存在初始间隙时则有较大的影响,坝体的应力和位移均随着初始间隙的增大而增大。
An incremental constitutive model for joints of dam is established by means of penalty coefficient.The complementary virtual work equation is deduced.Based on the FEM,a linear complementary model for joint is proposed.The model well describes the contact condition of the joints and promotes the computation efficiency.The calculation of Xiaowan arch dam is given as an example to analyze the influence of joint and initial gap on behavior of arch dam.The calculation result indicates that the joint has little influence if there is no initial gap,but the influence will be remarkable if initial gap exists.The stress and displacement increase with the increase of initial gap.

引文

[1]　卓家寿,姜弘道.带有夹层基岩的三维弹塑性分析[J].华东水利学院学报,1979,(2):1～22.
    [2]　GoodmanRE,TaylorRL,BrekkeTL.Amodelforthemechanicsofjointedrock[J].JoftheSoilMechanicsandFoundations.1968,194(3):637-660.
    [3]　O′ConnorJPF.Themodelingofcracks,potentialcracksurfacesandconstructionjointsinarchdamsbycurvedsurfaceinterfaceelement[A].In:Procof15thICOLD[C].Lausanne,Switzerland,1985,389-406.
    [4]　WeberB,HohbergJM,BachmanH.Earthquakeanalysisofarchdamsincludingjointnon linearityandfluid structureinteraction[J].DamEngineering,1990,1(4):267-277.
    [5]　FenvesGL,MojtahediS.Earthquakeresponseofanarchdamwithconstructionjointopening[J].DamEngineering,1993,4(2):63-89.
    [6]　赵光恒,杜成斌.分缝拱坝的地震响应分析[J].河海大学学报,1994,22(5):1-8.
    [7]　朱伯芳.有限厚度带键槽接缝单元及接缝对混凝土坝应力的影响[J].水利学报,2001,(2):1-7.
    [8]　李雪春,陈重华,徐昕.非整体拱坝结构分析研究[J].水利学报,2002,(6):47-52.
    [9]　李建新,王光纶,金峰.横缝结合质量对拱坝结构受力的影响[J].水利发电,2001,(10):45-48.
    [10]　孙林松.三维弹塑性接触问题的线性互补模型及拱坝结构非整体性分析研究[D].南京:河海大学,2001.