水利学报Issue(12)：1487-1492,6.DOI:10.13243/j.cnki.slxb.2014.12.013
现场浇筑大坝混凝土起裂断裂韧度研究
Initial fracture toughness of site-casting dam concrete
摘要
Abstract
In this paper,the study aims to examine the initial fracture toughness KIinic of dam concrete ob⁃tained directly from a construction site. All test specimens with a maximum aggregate size of dmax = 150 mm were cast on site of an actual super-high arch dam in southwest China, and the dimensions of the wedge-splitting specimen were 800 mm × 800 mm × 450 mm,1000 mm × 1000 mm × 450 mm,1200 mm × 1200 mm × 450 mm, respectively. Based on the experimentally acquired initial cracking loads, the initial fracture toughness KI inic of the site-casting specimens was numerically obtained using the finite element method. Fur⁃thermore,the effect of specimen age and size on initial fracture toughness was analyzed and discussed. The results show that real fracture parameter KI inic of a super-high arch dam could be obtained by casting the test specimens at the construction site. The initial fracture toughness KI inic of the site-casting specimens in⁃creases with specimen age. The KI inic of the site-casting specimens at the age of 180 days is independent of specimen size at depths of 800 mm to 1200 mm.关键词
现场浇筑/大坝混凝土/真实断裂参数/起裂断裂韧度/试件龄期/试件尺寸Key words
site-casting/dam concrete/real fracture parameters/initial fracture toughness/specimen age/specimen size分类
建筑与水利引用本文复制引用
管俊峰,李庆斌,吴智敏,周绍武..现场浇筑大坝混凝土起裂断裂韧度研究[J].水利学报,2014,(12):1487-1492,6.基金项目
国家自然科学基金重点资助项目（51339003）；国家自然科学基金资助项目（51209094）；海岸和近海工程国家重点实验室基金项目 （）
