摘要
为研究波形钢腹板内衬超高性能混凝土组合梁的抗剪性能,考虑钢板厚度、波纹长度和内衬混凝土厚度设计制作7个试件,通过抗剪试验,观察试件破坏形态,获取其面内与面外的挠度,并分析各参数对试件荷载-位移曲线的影响规律。结果表明:试件破坏形式为剪切破坏,内衬混凝土出现关键剪切斜裂缝,钢板发生不同程度的鼓曲,两者共同承担剪力;增大钢板厚度可以显著提升试件的抗剪性能;试件抗剪承载力随混凝土厚度的增大而增大,但继续增大混凝土厚度,承载力增大速率反而变缓;当波纹长度由1200 mm增加到1600 mm时,抗剪承载力增大,当增加到2000 mm时,会导致承载力降低。本研究为波形钢腹板超高性能混凝土组合结构在大跨桥梁中的应用提供了理论依据。
In order to study the shear performance of corrugated steel webs combination girder lined with ultra-high performance concrete,seven specimens were designed and produced by considering the thickness of the steel plate,corrugation length and thickness of the inner lining concrete.Through shear tests,the damage form of the specimens was observed,the deflections in and out of the face were obtained,and the influence of each parameter on the specimen load-displacement curves was analysed.The results show that the damage form of the specimen is shear damage.The key shear diagonal cracks appear in the inner lining concrete,and the steel plate occurs to different degrees of the bulge,the two jointly bear the shear force.Increasing the thickness of the steel plate can significantly improve the shear performance of the specimen.The specimen shear capacity increases with the increase in the thickness of the inner lining concrete,but continue to increase the thickness of the inner lining concrete,the rate of increase in the bearing capacity instead of slowing down.When the corrugation length is increased from 1200 mm to 1600 mm,the shear capacity increases.When it is increased to 2000 mm,it leads to a decrease in the capacity.This study provides a theoretical basis for the application of corrugated steel web composite structure with ultra-high-performance concrete in large-span bridges.
作者
杜国锋
方晓蕾
战欣霖
张娟
DU Guofeng;FANG Xiaolei;ZHAN Xinlin;ZHANG Juan(School of Urban Construction,Yangtze University,Jingzhou 434023,Hubei)
出处
《长江大学学报（自然科学版）》
2024年第5期110-119,138,共11页
Journal of Yangtze University(Natural Science Edition)
基金
国家自然科学基金项目“高强钢管超高性能混凝土地震损伤机理及抗震性能调控研究方法”(52078052)。
关键词
桥梁工程
波形钢腹板
内衬混凝土
抗剪性能
超高性能混凝土
bridge engineering
corrugated steel webs
inner lining concrete
shear performance
ultra-high performance concrete
