岩土工程学报2017，Vol.39Issue(2)：366-372,7.DOI:10.11779/CJGE201702022
基于混凝土不均匀性面板堆石坝面板损伤分析
Slab damage of concrete face rockfill dam based on heterogeneity of concrete
摘要
Abstract
Considering the heterogeneity characteristics of concrete materials, the method of the mesoscopic mechanics is used to investigate the dynamic damage of slabs of concrete face rockfill dam (CFRD) combined with the statistical principle. The mechanical properties, including the elastic modulus and tensile strength, of concrete are assumed to conform to the Weibull distribution law. The elastic-brittle damage model is adopted to simulate the whole deformation and failure process for concrete on a meso-scale through 2D finite element analysis. The results show that the maximum slop-direction tensile stresses in the slabs mainly occur at the height of 0.65 H to 0.85H (H is the height of the dam), and the tensile damage of slabs mainly occur at the height of 0.8H when the randomness of concrete materials is neglected. With the decrease of homogeneity index, the region of the dynamic damage of slabs is scattered, but it is mainly concentrated at the height of 0.4H to 0.9H. Thus, this part of the slab should be the key area of seismic design for CFRD. The micromechanical damage model for concrete can reflect the damage process of slabs precisely. The research may provide guidance for the seismic design of CFRD.关键词
面板堆石坝/混凝土/细观损伤模型/随机分布/损伤Key words
CFRD/concrete/mesoscopic damage model/random distribution/damage分类
建筑与水利引用本文复制引用
徐斌,刘小平,邹德高,孔宪京,余翔..基于混凝土不均匀性面板堆石坝面板损伤分析[J].岩土工程学报,2017,39(2):366-372,7.基金项目
国家自然科学基金重大研究计划集成项目(91215301) （91215301）
国家自然科学基金项目(51379028,51379028,51508071) （51379028,51379028,51508071）
