摘要
本文运用钢筋混凝土桁架模型理论及混凝土软化理论,以拉杆拱为钢筋混凝土深梁剪切破坏的计算模型,根据变形协调条件、应力平衡条件、材料本构关系,推导出钢筋混凝土深梁在纵筋配筋率超过弯剪界限配筋率时抗剪强度的计算公式。计算公式表明,钢筋混凝土深梁抗剪强度,主要受剪跨比、混凝土强度、梁截面积、配箍率及箍筋强度等因素的影响。理论分析与试验结果进行了比较,两者情况基本相符。
Based on the softened truss model theory and the softened concrete theory,a theoret- ical treatment of the shear behavior of deep beams is investigated.The tied arch is taken as the calculat- ing model of the shear strength of R.C.deep beams.The shear failure occures when the horizontal re- inforcement is greater than the critical reinforcement of flexure—shear strength.It is found that the shear strength of R.C.deep beams,are influenced by f_c,b,h,λ,ρ_(sv) and f_(yu).The analytical results agree well with the test results.
出处
《石家庄铁道大学学报（自然科学版）》
1990年第1期15-24,共10页
Journal of Shijiazhuang Tiedao University(Natural Science Edition)
关键词
深梁
抗剪强度
混凝土强度
剪跨比
配箍率
deep beams
shear strength
concrete strength
shear span
vertical reinforcement
