摘要
对局部高密度钢纤维混凝土(简称PHPFRC)缺口试件在静荷载作用下的断裂过程进行了力学分析。分析中重点考虑纤维应力对裂尖奇异性的影响和纤维应力在断裂截面上产生桥架作用对承载力的影响等。确定了考虑纤维闭合力的模型，根据对局部高密度钢纤维混凝土断裂过程各阶段的非线性分析，编制了计算分析程序。通过计算获得的P－CMOD关系曲线与试验结果曲线相吻合，确定了有关参数。为定量计算PHPFRC缺口试件的裂尖有效应力强度因子K奠定了基础。
Presents the analysis of fracture properties of PHPFRC notched beams under static loading with emphasis on the influences of fiber bridging forces on the corrying capacity and singularity effect at crack tip，the model established for calculation of fiber bridging closing pressure and the procedure to calculate P－CMOD curves based on the non－linear analysis at different stages during fracture of PHPFRC，and the parameters determined from the calculated curves in good agreement with test results．
出处
《哈尔滨建筑大学学报》
北大核心
2001年第2期16-21,共6页
Journal of Harbin University of Civil Engineering and Architecture
关键词
局部高密度
钢纤维混凝土
断裂
应力强度因子
partially high percentage fiber reinforced concrete；fracture；stress intensity factor； CMOD；non－linear；fiber bridging force；notched beam；bearing capacity
