建筑钢结构进展2024，Vol.26Issue(8)：19-27,39,10.DOI:10.13969/j.cnki.cn31-1893.2024.08.003
薄壁型钢混凝土梁抗弯性能试验研究
Experiment on the Flexural Behavior of Thin-Walled Steel Reinforced Concrete Beams
摘要
Abstract
In order to investigate the flexural performance of thin-walled steel reinforced concrete(TSRC)beams,five TSRC beams were designed,and subjected to four-point bending tests.The study aimed to examine the effects of different arrangements of shear screw,cross-sectional shapes,shear-span ratios,and concrete cover thicknesses on the flexural performance of TSRC beams.The results show that the failure mode of TSRC beams is local buckling at the loading point of the thin-walled tube,with diagonal cracks appearing in the outer concrete cover and cracking along the shear bolts.The TSRC beam specimens did not exhibit brittle failure during the loading process and showed good ductility.The cracking load of TSRC beams is relatively small,ranging from 0.11Pu～0.15Pu,with a small number of cracks,typically 6 to 10.Full span arrangement of screws,increasing steel tube cross-section,reducing shear-span ratios,and increasing corcrete cover thicknesses can all improve the load-bearing capacity of TSRC beam specimens.Based on the experimental results,the equations for calculating the ultimate flexural capacity and stiffness of TSRC beams are proposed,which can provide a reference for the application of this component in real engineering projects.关键词
薄壁型钢混凝土/试验研究/抗弯性能/抗弯刚度Key words
thin-walled steel reinforced concrete/experimental study/flexural capacity/flexural stiffness分类
建筑与水利引用本文复制引用
任重,张志鹏,何逸鸣,程亮,戴柳丝..薄壁型钢混凝土梁抗弯性能试验研究[J].建筑钢结构进展,2024,26(8):19-27,39,10.基金项目
上海市自然科学基金(22ZR1422700) （22ZR1422700）
