河南科技大学学报（自然科学版）2024，Vol.45Issue(3)：53-60,8.DOI:10.15926/j.cnki.issn1672-6871.2024.03.007
预制模壳填芯混凝土悬臂盖梁承载力分析
Bearing Capacity Analysis of Cantilevered Bent Cap with Precast Shell Formwork and Core-filled Concrete
摘要
Abstract
The lightweight development of bent caps is an inevitable requirement to realize fully prefabricated bridges.Based on the existing static test of cantilevered bent caps with precast shell formwork and core-filled concrete,the numerical analysis of specimen PRC1 was carried out by using finite element software ABAQUS,and the finite element calculation results matched well with the test results,which verified the reliability of the finite element model.By modifying the parameters of the verified finite element model,the effects of shell formwork concrete strength,longitudinal rebar ratio,and interface contact settings on the mechanical properties of cantilevered bent caps with precast shell formwork and core-filled concrete were further analyzed.The theoretical calculation formula of the specimen was established based on the calculation method of bearing capacity of reinforced concrete general member,and the proposed calculation formula was verified.The results show that when the shell formwork material is normal concrete,the peak bearing capacity increases by only 1%when the normal concrete strength grade is increased from C35 to C60,while the peak bearing capacity when the shell formwork material is ultra-high performance concrete(UHPC)increases by 22%compared with C35.The longitudinal rebar ratio shows a linear increase trend with the peak bearing capacity,and when the diameter of the top row of longitudinal rebar is increased from 14 mm to 22 mm,the peak bearing capacity is increased by 34%.The peak bearing capacity of the interface contact set to tie constraint is closer to the test results than the surface-to-surface contact,and the latter is relatively conservative.The results of the bearing capacity calculation method based on reinforced concrete general member match well with the test results and the finite element analysis results.关键词
预制模壳填芯混凝土悬臂盖梁/静力试验/有限元/参数分析/承载力计算Key words
cantilevered bent caps with precast shell formwork and core-filled concrete/static test/finite element/parametric analysis/bearing capacity calculation分类
建筑与水利引用本文复制引用
贾俊峰,张福香,张瑞,张建勋..预制模壳填芯混凝土悬臂盖梁承载力分析[J].河南科技大学学报（自然科学版）,2024,45(3):53-60,8.基金项目
国家自然科学基金项目(52178449) （52178449）
河南省交通运输厅科技项目(2022-7-3) （2022-7-3）
