摘要
基于29个腹部开圆孔和42个腹部开矩形孔的钢筋混凝土简支梁的试验结果,针对不同受剪破坏形态,提出了腹部开孔的钢筋混凝土简支梁孔侧剪切破坏下的受剪承载力下限值计算公式以及上下弦杆剪切破坏下的受剪承载力计算公式,计算公式中反映了孔洞尺寸、加强腹筋、梁纵筋面积、弦杆高度、剪跨比等参数的影响。通过和国内外共计122个钢筋混凝土开孔简支梁试件试验数据的对比表明,建议公式的计算结果与试验结果吻合较好,且具有适当的安全储备。并给出了建议公式的推荐适用范围,可供实际工程设计参考。
Based on the experimental results of 29 specimens of reinforced concrete simply supported beam with circular web openings and 42 specimens with rectangular web openings, Calculating formulas for the shear capacity of simply supported beams with web openings subjected to concentrated load are presented in this paper. The formulas are suitable for calculating the shear capacity of the beams whose failure occurs beside the openings and whose failure occurs at the chord above the openings or the chord below the openings. Parameters such as size of the openings, amount of reinforcing web stirrup and diagonal reinforcement, amount of longitudinal reinforcement, sectional height of chords and ratio of shear span to effective depth of section, are included in the formulas. The calculation results of 122 specimens in literatures by suggested formulas are in good agreement with the experimental ones and have some safety margin. Suggested usable ranges of the formulas are also presented. The formulas are relatively convenient and can be directly used in practical engineering design .
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2014年第3期149-155,共7页
Journal of Building Structures
基金
亚热带建筑科学国家重点实验室自主研究课题(2011ZC25
2011ZC28
2013ZC14
2013ZC20)
关键词
钢筋混凝土开孔梁
孔侧剪切破坏
弦杆剪切破坏
受剪承载力
reinforced concrete beam with web openings
shear failure beside openings
shear failure of chords above and below openings
shear capacity
