建筑钢结构进展2025，Vol.27Issue(11)：10-21,12.DOI:10.13969/j.jzgjgjz.20240614001
内置铆接开孔冷弯薄壁型钢混凝土组合梁受弯性能研究
Research on Flexural Performance of Cold-Formed Thin-Walled Steel-Concrete Composite Beams with Built-in Riveted Openings
摘要
Abstract
Based on the advantages of reliable force transfer and high strength of lock riveted joint,a new type of cold-formed thin-walled steel-concrete composite beam with built-in riveted openings is proposed.A four-point bending test was carried out to investigate the failure characteristics,bearing capacity and ductility of the thin-walled steel-concrete composite beams with built-in riveted openings,taking the distance of rivet at the bottom and the width of section as variables.The test results show that the new composite beams exhibit good ductility properties under bending.The ductility of composite beams with small rivet spacing at the bottom is slightly poor.The ultimate bearing capacity of composite beams can be improved by increasing the section width.ABAQUS finite element software was used to analyze the effects of concrete encasement,concrete strength,rivet distance at the top,thickness of steel plate at the bottom,and section height on the performance of the composite beams.The results show that the stiffness and bearing capacity of the specimens can be effectively improved by pouring concrete around the C-shaped steel web.With the increase of the concrete strength,the thickness of the bottom steel plate,the height of the section and the decrease of the rivet distance at the top,the flexural capacity of the composite beam increases.The error between the calculated value and the test results is less than 10%,which indicates that the full section plastic criterion can accurately reflect the ultimate bearing capacity of the composite steel and concrete beams with built-in riveted openings.关键词
冷弯薄壁型钢/组合梁/铆接开孔/受弯承载力/延性Key words
cold-formed thin-walled steel/composite beam/riveting opening/bending capacity/ductility分类
土木建筑引用本文复制引用
潘志宏,郑建强,司启,王云庆,李航..内置铆接开孔冷弯薄壁型钢混凝土组合梁受弯性能研究[J].建筑钢结构进展,2025,27(11):10-21,12.基金项目
镇江市重点研发计划-产业前瞻与共性关键技术项目(GY2023028),江苏省研究生科研与实践创新计划项目(SJCX24_2561) （GY2023028）
