冲击荷载下钢纤维混凝土的细观数值研究  

Mesoscopic numerical study on steel fiber reinforced concrete under impact loading

作　　者：庞书孟[1] 浣石[1] 陶为俊[1] 谭湘倩[1] 

机构地区：[1]广州大学土木工程防护研究中心,广东广州510006

出　　处：《广州大学学报（自然科学版）》2015年第1期61-64,共4页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金专项仪器基金资助项目(51227006)

摘　　要：针对不同钢纤维体积率的钢纤维混凝土(SFRC)建立了包含骨料、砂浆、界面过渡区(ITZ)和钢纤维的细观数值模型,并通过模拟分离式霍普金森压杆(SHPB)试验分析钢纤维混凝土在不同钢纤维体积率下微裂纹的萌生、扩展直到贯通的全过程.模拟研究发现:钢纤维加入后延迟了混凝土试件的破坏,同时增加了试件的延展性和韧性.The mesoscopic numerical models cotTesponding to different fiber dosages were developed with dis- tinctive consideration of the aggregates, cement mortar, interracial transition zone and steel fibers, and then the complete failure processes including the initiation, development of micro-cracks and final penetration of SFRC specimens with different fiber dosages were simulated by SHPB test. The simulation results showed that the fail- ure of SFRC specimens was delayed, and their ductility and toughness also could be increased due to the addi- tion of the steel fibers.

关 键 词：钢纤维混凝土 分离式霍普金森压杆 细观数值模型 

分 类 号：TU528.572[建筑科学—建筑技术科学]