湖南大学学报（自然科学版）2024，Vol.51Issue(3)：141-148,8.DOI:10.16339/j.cnki.hdxbzkb.2024036
非对称集中荷载下无腹筋RC梁受剪性能试验研究
Experimental Study on Shear Behavior of RC Beam without Web Reinforcement under Asymmetric Concentrated Load
摘要
Abstract
Simply supported reinforced concrete(RC)beams without web reinforcement under asymmetric concentrated load have two different shear span-depth ratios,while the relationship between the shear capacity and the shear action of each shear span is uncertain.An experimental study on the shear behavior of 6 simply supported RC beams without web reinforcement under asymmetric concentrated load and 4 specimens subjected to symmetric concentrated load was carried out.The failure patterns,load-midspan displacement curves and the strains of longitudinal tensile reinforcement were obtained.Moreover,the applicability of the corresponding formula in the Chinese code for design of concrete structures(GB 50010-2010),the modified compression field theory,the strain-based shear strength model and Zsutty's formula were analyzed.The results indicate that when the small shear span-depth ratio of simply supported RC beams without web reinforcement is always 1.0 and the large shear span-depth ratios are from 2.0 to 4.0,the shear failure occurs in the larger shear span.When the larger shear span-depth ratio increases from 3.0 to 3.5,the ultimate load capacity of the beam is controlled by the smaller shear span changed from being controlled by the larger shear span.The locations of shear failure in simply supported RC beams without web reinforcement under asymmetric concentrated load predicted by GB 50010-2010 are opposite to the experimental results,while Zsutty's formula provides a less biased prediction.关键词
非对称荷载/钢筋混凝土/无腹筋梁/受剪性能/静力试验Key words
asymmetric loads/RC/beam without web reinforcement/shear behavior/static test分类
建筑与水利引用本文复制引用
袁健,刘家栋,段绍伟..非对称集中荷载下无腹筋RC梁受剪性能试验研究[J].湖南大学学报（自然科学版）,2024,51(3):141-148,8.基金项目
国家自然科学基金资助项目(52178183),National Natural Science Foundation of China(52178183) （52178183）
