集中荷载作用下高强钢筋混凝土深梁受剪承载力影响因素分析

Influencing Factors on Shear Capacity of High-Strength Reinforced Concrete Deep Beams

深梁由于其特殊的结构和巨大的承载能力,在建筑领域受到广泛关注.由于深梁受力较为复杂,影响深梁承载能力的因素较多,学者们对各影响因素的看法存在差异.对7根高强钢筋混凝土深梁进行受剪承载力试验研究,分析剪跨比、水平筋配筋率、箍筋配筋率对深梁受剪承载力的影响,同时对中国规范GB 50010—2010和美国规范ACI 318-99进行合理评估,为高强钢筋混凝土深梁设计提供参考借鉴.研究发现:剪跨比对高强钢筋混凝土深梁受剪承载力影响最大,水平筋配筋率次之,箍筋配筋率对深梁受剪承载力影响最小;规范GB 50010—2010中对深梁受剪承载力的计算值与试验值较为接近,而规范ACI 318-99的计算值离散程度较小.

Because of its special structure and huge load-bearing capacity,deep beams have received extensive attention in the field of architecture.Because deep beams are more complex in force and there are many factors that affect the load-bearing capacity of deep beams,scholars have different views on the various factors.An experimental study on the shear bearing capacity of 7 high-strength reinforced concrete deep beams was carried out,and the influence of the shear-span ratio,horizontal reinforcement ratio,and stirrup reinforcement ratio on the shear bearing capacity of deep beams was analyzed.The Chinese code GB 50010—2010 and American Code ACI 318-99 were evaluated,providing reference for the design of high-strength reinforced concrete deep beams.It is found that the shear-span ratio has the greatest influence on the shear bearing capacity of high-strength reinforced concrete deep beams,followed by the horizontal reinforcement ratio,and the stirrup reinforcement ratio has the least influence on the shear bearing capacity of deep beams.The calculated value of GB 50010—2010 on the deep beam shear bearing capacity is close to the experimental value,while the calculated value of ACI 318-99 has a smaller degree of dispersion.