钢筋混凝土平板冲剪强度的无量纲公式（英文）  

Dimensionless Formulae for Punching Shear Strength of Reinforced Concrete Slabs

作　　者：咸玉席[1] 文鹤鸣[1] 

机构地区：[1]中国科学技术大学中科院材料力学行为和设计重点实验室,安徽合肥230027

出　　处：《高压物理学报》2016年第4期291-300,共10页Chinese Journal of High Pressure Physics

基　　金：National Natural Science Foundation of China(11172298)

摘　　要：冲剪研究对钢筋混凝土平板和柱连接之间承载能力的评估以及核电厂中安全壳的安全计算和安全评估有重要意义。先前研究都忽略了跨深比对冲剪强度的影响,且现有设计准则中所用的方程量纲不一致,故大大限制了其使用范围和精度。给出了一个新的无量纲公式,考虑了钢筋数量、钢筋间距和跨深比的影响,可用于预测钢筋混凝土平板在冲头作用下的冲剪强度。结果表明,新方程与已有实验结果吻合得很好,且优于现有设计准则。Punching shear plays a very important role in assessing the load carrying capacities of connections between slabs and columns or slabs loaded by flat-faced punches,especially in the safety calculation and assessment of containment structures in nuclear power plants.For many years this has been examined by researchers and the influences of the span-to-depth ratio on punching shear strengths are often neglected,and all the equations employed in the current codes are dimensionally inconsistent.We proposed a dimensionless new empirical equation to predict the punching shear strengths of reinforced concrete circular slabs without shear reinforcement which are loaded quasi-statically by flat-faced circular indentors.In the present formulation,we took into consideration various effects such as rebar quantity,rebar spacing and span-to-depth ratio.It is shown that the present equation is in good correlation with available experimental results.It is also shown that the present equation is applicable to square punches as well as square slabs.

关 键 词：冲剪强度 钢筋混凝土板 跨深比 钢筋量 钢筋间距 

分 类 号：O347.3[理学—固体力学] TU375[理学—力学]