水利学报2011，Vol.42Issue(10)：1218-1225,8.
武都重力坝碾压混凝土动态弯拉性能的试验研究与数值分析
Experimental research and numerical analysis on dynamic flexural bending performance of concrete in Wudu RCC Gravity Dam
摘要
Abstract
The Wudu Reservoir is an important project on Fujiang River, whose dam is designed to be a roller compacted concrete （RCC） gravity dam. The flexural bending test for two-graded and three-graded RCC prism core samples of the Wudu RCC Gravity Dam under different initial static load cases were carried out. At the same time the flexural strength of concrete and the crack expanding process were analyzed by the methods of meso-mechanics and damage mechanics. The test results indicate that the strength of concrete with different kinds of grade is influenced by the initial static loads and the load speed in different degrees. For the two-graded concrete, the dynamic strength amplification factors fall into a range between 1.45 and 1.53 under different pre-static loads, the dynamic strength increases with the increase of the ini- tial static load ratio when the initial static load is up to within 80%. For the three-graded concrete, the dy- namic strength amplification factors fall into a range between 1.27 and 1.41 under different pre-static loads and the dynamic strength decreases with the increase of the initial static load ratio when the initial static load is up to within 80%. The concrete of Wudu RCC Gravity Dam is somewhat over-strengthened. The calculated results of the dynamic flexural strength amplification factors under different initial loads are approximate to the test results.关键词
重力坝/碾压混凝土/动态弯拉强度/预静载/加载速率Key words
gravity dam/roller compacted concrete/dynamic flexural strength/pre-static load/load speed分类
建筑与水利引用本文复制引用
张艳红,胡晓..武都重力坝碾压混凝土动态弯拉性能的试验研究与数值分析[J].水利学报,2011,42(10):1218-1225,8.基金项目
国家自然科学基金资助项目 （）
