摘要
设计了3组不同配比活性粉末混凝土(RPC)试件,研究了钢纤维对RPC试件力学性能的影响,分析了RPC抗压本构关系,并提出了新的RPC抗拉本构方程。在此基础上设计了矩形梁抗弯承载力试验,研究了钢纤维对RPC梁的延性、韧性、承载力和抗裂性能的影响。结果表明:掺钢纤维RPC梁的开裂荷载、屈服荷载及极限承载力较未掺钢纤维RPC梁均提升了20%以上,构件的裂缝宽度能够控制在0.1 mm以内。
3 groups of reactive powder concrete(RPC)specimens with different mix proportions were designed,the influence of steel fiber on the mechanical properties of RPC specimens was studied,the compressive constitutive relationship of RPC was analyzed,and a new RPC tensile constitutive equation was put forward.On this basis,a rectangular beam flexural bearing capacity test was designed,and the influence of steel fiber on the ductility,toughness,bearing capacity and anti-cracking performance of RPC beams was studied.The results show that the crack load、yield load and ultimate flexural capacity of RPC beams with steel fiber are increased by more than 20%compared with RPC beams without steel fiber,and the crack width of the members can be controlled to less than 0.1 mm.
作者
龙佩恒
黄琳艺
乔宏
宋浩
李飞
LONG Pei-heng;HUANG Lin-yi;QIAO Hong;SONG Hao;LI Fei(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China)
出处
《混凝土与水泥制品》
北大核心
2020年第10期55-60,共6页
China Concrete and Cement Products
基金
国家自然科学基金项目(51608028)。
关键词
活性粉末混凝土(RPC)
钢纤维
梁
力学性能
本构关系
Reactive powder concrete
Steel fibre
Beam
Mechanical property
Constitutive relationship
