考虑横缝、裂缝接触非线性的高拱坝抗震分析  

Seismic analysis of high arch dams considering lateral joint-crack contact nonlinearity

作　　者：李晓娜[1] 陈怡乐 李同春 何金文[3] Li Xiaona;Chen Yile;Li Tongchun;He Jinwen(School of Water Resources and Hydro-electric Engineering,Xi'an University of Technology,710048,Xi'an,China;Agricultural Engineering Institute,Hohai University,210098,Nanjing,China;College of Hydraulic&Environmental Engincering,China Three Gorges University,443002,Yichang,China)

机构地区：[1]西安理工大学水利水电学院,西安710048 [2]河海大学农业工程学院,南京210098 [3]三峡大学水利与环境学院,宜昌443002

出　　处：《应用力学学报》2021年第2期856-860,共5页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51809212);陕西省自然科学基础研究计划资助项目(2018JQ5132);陕西省教育厅专项科研计划项目(18JK0575)。

摘　　要：高拱坝横缝、裂缝在地震作用下对坝体的影响不可忽略。通过采用局部连续-非连续变形动态接触算法,考虑横缝、裂缝接触非线性,无限地基的辐射阻尼效应,以及坝体-库水的相互作用,对某高拱坝抗震性能进行了分析,结果表明:上游坝面的拱冠梁附近及左右岸坝肩附近的横缝开度较大;下游坝面左岸坝肩靠近拱冠位置的横缝开度较大;裂缝B比裂缝A的张开范围大。本文计算得到的横缝和裂缝的开度可为高拱坝坝面防渗材料抗震性能提供数据支持,并且该计算方法可为高拱坝抗震安全分析提供新的思路。In order to analyze the influence of transverse joints and cracks of high arch dam on dam body under earthquake,this paper investigates the seismic performance of a high arch dam,in which the local continuous-discontinuous deformation dynamic contact algorithm is utilized,and the non-linearity of transverse joints and cracks,the radiation damping effect of infinite foundations and the dam body-storage water interaction are all included.It is revealed that the horizontal seams,respectively near the arch crown beam on the upstream dam surface and near the left and right bank abutments,are relative large.Whilst the horizontal seam opening on the left bank abutment near the downstream dam surface is closer to the arch crown.In addition,the horizontal crack B has a smaller cracking range than the horizontal crack A.The transverse joints and crack openings calculated in this paper can provide data support for the seismic performance analysis of the high arch dam.The methodology described in this paper also provides guidelines for the analysis of dam seismic safety.

关 键 词：高拱坝 横缝 裂缝 接触非线性 抗震 

分 类 号：TV312[水利工程—水工结构工程]