结构工程师2025，Vol.41Issue(4)：9-15,7.DOI:10.15935/j.cnki.jggcs.202504.0002
集中荷载作用下钢筋混凝土梁箍筋有效性系数研究
Study on Effectiveness Factor of Stirrups for Reinforced Concrete Beams under Concentrated Loads
摘要
Abstract
To assess stirrup stress in reinforced concrete beams under concentrated loads,ATENA software was employed to perform nonlinear finite element analysis of shear behavior in test beams.This study compiled shear test data from 158 reinforced concrete beams with stirrups subjected to concentrated loads(shear-span ratio≥2.5).Using a validated finite element model,we calculated the stress in stirrups intersected by the critical diagonal crack at the ultimate limit state of bearing capacity.Results demonstrate that the 45° truss model substantially underestimates stirrup shear resistance in ultimate limit state conditions.We recommend revising GB/T 50010-2010(Code for Design of Concrete Structures)to adopt a stirrup effectiveness coefficient of 1.25 in the shear capacity design formula for reinforced concrete beams,along with corresponding adjustments to the concrete contribution term.关键词
钢筋混凝土梁/受剪承载力/箍筋有效性/ATENA/有限元分析Key words
reinforced concrete beam/shear bearing capacity/stirrup effectiveness/ATENA/finite element analysis分类
建筑与水利引用本文复制引用
袁健,刘浩龙,罗文海..集中荷载作用下钢筋混凝土梁箍筋有效性系数研究[J].结构工程师,2025,41(4):9-15,7.基金项目
国家自然科学基金项目(52178183) （52178183）
