中文摘要：

通过对3种不同缝高比试件的大尺寸单边切口四点剪切梁式试件,进行自密实堆石混凝土Ⅰ-Ⅱ复合型断裂性能进行试验研究,研究这种新工艺混凝土材料的断裂机理,测得了各试件的起裂荷载、极限荷载及起裂角θ,获得了F-δ曲线。结果表明：缝高比（c/h）在0.4~0.8之间起裂角增长较为明显,缝高比在0.8~1.2之间起裂角增长较为缓慢。

英文摘要：

An experiment on Ⅰ-Ⅱ mixed mode fracture performance of self-compacting rock-filled concrete was carried out by using large-size single incision four-point shearing beams with three different crack-depth ratios.The fracture mechanism of new technology material was researched and the fracture loads,initial loads,F-δ curve and crack initiation angles were measured in this experiment.The results showed that crack initiation angle increased obviously when crack-depth ratio ranges from 0.4 to 0.8,but it growed slowly when crack-depth ratio ranges from 0.8 to 1.2.