土木与环境工程学报（中英文）2025，Vol.47Issue(4)：58-65,8.DOI:10.11835/j.issn.2096-6717.2023.087
预应力RC-UHPC组合箱梁正截面抗裂性能
Crack resistance of prestressed RC-UHPC composite box girder
摘要
Abstract
The prestressed RC-UHPC composite box girder with high tensile strength and corrosion-resistant ultra-high performance concrete(UHPC)as the web and bottom plate and reinforced concrete(RC)as the top plate was proposed,and a specimen was fabricated.The flexural test was carried out to analyse the crack development pattern and damage mode of the specimen;the finite element software was used to simulate the test,and the calculation accuracy was verified by comparing the finite element calculation results with the testing data,on the basis of which 19 finite element analysis models were established to analyse the influence of various parameters on the cracking moment;relevant codes and existing literature were used to investigate the cracking moment of the prestressed RC-UHPC composite box girder.The results show that:the first crack appeared when the specimen was loaded to about 33.3%of ultimate load;the cracking moment was influenced by the prestressing bar tension factor,the prestressing bar reinforcement ratio and the tensile strength of UHPC;the cracking moment calculation method based on the conversion section and the crack width calculation formulas in DBJ 43/T 325-2017 were used to calculate the cracking moment and crack width of the prestressed RC-UHPC composite box girder,respectively,and the calculated values agreed well with the testing and FE results.关键词
桥梁工程/组合梁/超高性能混凝土/开裂弯矩/裂缝宽度Key words
bridge engineering/composite beam/ultra-high performance concrete/cracking moment/crack width分类
交通工程引用本文复制引用
林上顺,暨邦冲,夏樟华,杨阳,林建凡,赵锦冰..预应力RC-UHPC组合箱梁正截面抗裂性能[J].土木与环境工程学报（中英文）,2025,47(4):58-65,8.基金项目
福建省自然科学基金(2019J01779) （2019J01779）
福建省交通科技计划(202024) Natural Science Foundation of Fujian Province(No.2019J01779) （202024）
Transportation Science and Technology Plan Project of Fujian Province(No.202024) （No.202024）
