摘要
在高应力状态下坝料的流变较为明显。为研究坝料流变对混凝土面板坝应力变形的影响,采用长科院九参数幂级数流变模型及其试验参数,对某高混凝土面板堆石坝进行应力、变形分析。结果表明,坝料流变使坝体变形明显增加,坝体应力有所减小。考虑坝料的流变特性后的面板法向位移(挠度)明显增加,面板坝轴向和顺坡向应力极值增加。对于分期浇筑面板和分期蓄水的高混凝土面板堆石坝,选用合适的流变本构模型正确地模拟堆石体的流变特性,可以为大坝填筑进度及面板分期浇筑时间的确定提供参考,并有助于正确地预测大坝的应力变形。
Rockfill Creep is obvious in high stress state.In order to study the effect of rockfill creep to stress and displacement in high concrete face rockfill dam（CFRD）,using the nine parameter power series constitutive model and its test parameters, the stress and deformation simulation analysis rockfill creep for a example of CFRD are performed.The results show that the deformation of dam evidently increases and stress relax a little.The creep of the rockfill result to some increase of the normal direction deformation and stress of the concrete face.With correct creep constitutive model in simulating deformation of rockfill can offer some references for the dam construction schedule and decision of concrete face constructing time.It has also very important significance for forecasting the stress and deformation of CFRD.
出处
《西北地震学报》
CSCD
北大核心
2011年第B08期281-284,294,共5页
Northwestern Seismological Journal
基金
国家十一五科技支撑课题(2008BAB29B02)
长江科学院中央级基本科研业务费(CKSF2010016)
关键词
面板堆石坝
流变
应力变形
九参数幂级数本构模型
Concrete face rockfill dam（CFRD）
Creep
Stress and displcement
Nine parameter power series constitutive model
