摘要
考虑拱坝横缝非线性接触在地震荷载下所呈现的张合特征,耦合坝体混凝土材料在地震动拉-压循环荷载作用下应力-应变呈现的非线性软化特征,综合研究了多因素影响下的高拱坝损伤开裂情况。研究结果表明:在施加超强地震荷载作用后,试验设计条件下张合效应最为突出的是拱坝中缝;同时随着地震峰值加速度的增大,坝体损伤加剧并导致横缝的张合出现一定的残余开度;在0.6 g地震峰值加速度工况下,坝体出现贯穿裂缝且主要位于拱坝的中上部。
Considering the tension characteristics of the non-linear contact between the transverse joints of arch dam under seismic load and the nonlinear softening characteristics of the coupled dam concrete material under cyclic tension-compression loading of ground motion,the damage and cracking of high arch dam are comprehensively studied.The research results indicate that,(a)the most prominent tension effect under designed experiment condition is the middle crack of arch dam under the action of super-strong seismic load;(b)with the increase of seismic peak value,the damage of dam is aggravated and results in a certain degree of residual opening;and(c)under the condition of 0.6 g seismic peak value,the dam appears penetrating cracks which is mainly located in the middle and upper part of dam body.
作者
张建伟
刘鹏飞
王涛
焦延涛
李兆恒
赵建军
ZHANG Jianwei;LIU Pengfei;WANG Tao;JIAO Yantao;LI Zhaoheng;ZHAO Jianjun(School of Water Conservancy,North China University of Water Resources and Electric Power,Zhengzhou 450046,Henan,China;Collaborative Innovation Center of Water Resources Efficiency and Protection Engineering,Zhengzhou 450046,Henan,China;Henan Provincial Hydraulic Structure Safety Engineering Research Center,Zhengzhou 450046,Henan,China;Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510635,Guangdong,China)
出处
《水力发电》
北大核心
2020年第3期66-72,共7页
Water Power
基金
国家自然科学基金项目(51679091)
河南省高校科技创新人才计划项目(18HASTIT012)
广东省水利科技创新项目(2017-16)
华北水利水电大学研究生教育创新计划基金项目(YK2018-16)。
关键词
高拱坝
横缝
非线性接触
混凝土
塑性损伤本构模型
横缝张合特性
坝体结构损伤
high arch dam
transverse joint
nonlinear contact
concrete
plastic damage constitutive model
transverse joint tension characteristics
dam structure damage
