建筑钢结构进展2023，Vol.25Issue(12)：73-84,12.DOI:10.13969/j.cnki.cn31-1893.2023.12.008
负弯矩区钢-SFRC组合桥面板抗弯性能试验研究
Experimental Study on Flexural Performance of Steel-SFRC Composite Bridge Decks in Negative Moment Region
朱宏平 1朱爱珠 1李正 1张朋1
作者信息
- 1. 华中科技大学土木与水利工程学院,武汉 430074
- 折叠
摘要
Abstract
Four steel-SFRC composite bridge deck specimens were designed and manufactured.The failure mode,stiffness,internal force distribution and ductility of each specimen were tested by four-point bending test.The effects of reinforcement ratio,volume ratio of steel fiber and reinforcement with embedding CFRP bars on the flexural performance of steel-SFRC composite bridge decks in the negative bending moment region of composite bridge were studied.The results show that the cracking load,yield load and stiffness of the specimens can be improved by increasing the reinforcement ratio,while there is less effect on the ultimate load.The expansion of concrete cracks can be restrained by increasing the volume ratio of steel fiber,thus the initial stiffness can be improved by about 8.5％.With the method of embedding CFRP bars,the strain of section can be reduced effectively and the plasticity of specimens develops more completely,thus the final failure mode of reinforced specimens is that obvious buckling failure.Meanwhile,the strains of composite bridge decks satisfy the assumption of plane section,as well as the ductility of the specimens can be improved by more than 27％.关键词
CFRP筋/嵌入式加固/钢-SFRC组合桥面板/抗弯性能Key words
CFRP bars/near surface mounted reinforcement method/steel-SFRC composite bridge deck/flexural performance分类
建筑与水利引用本文复制引用
朱宏平,朱爱珠,李正,张朋..负弯矩区钢-SFRC组合桥面板抗弯性能试验研究[J].建筑钢结构进展,2023,25(12):73-84,12.
