钢筋混凝土十字形异形柱-板柱连接抗弯承载力的研究

为了研究柱截面形式为异形柱的板柱连接冲切受力性能,进行了柱截面形状分别为3种典型异形柱(十字形、T形和L形)和对比方柱所构成的板柱连接的冲切特性试验.根据所进行的柱截面为十字形异形柱-板柱连接冲切特性的试验成果,提出了十字形柱-板柱连接的屈服线形式,并应用屈服线理论,导出了十字形异形柱-板柱连接的抗弯承载力表达式.该式形式简单、应用方便,其理论计算值与试验值比较,符合较好.结果可供类似柱形的板柱连接强度计算时参考.

Investigation of bearing capacity to flexure of reinforced concrete slab-column connections on columns with cross-shaped cross-section

To investigate the punching shear behavior of slab-column connections with nonrectangular columns,an experiment on the three specimens of column with three kinds of typical special-shaped cross-section(cross-shaped section,T-shaped section and L-shaped section),which were connected with reinforced concrete slabs,and reference specimens with square columns was conducted.Based on the experimental result of the characteristics of reinforced concrete slabs with cross-shaped column and the yield-line theory,the yield-line pattern of reinforced concrete slab-column connection with cross-shaped column was presented and the flexural strength formula was derived.This formula is simple in form and easy to use.It is shown that a significantly better agreement of theoretical computations with the experimental results of the specimens in flexural failure is obtained,so that the result provides a reference for the strength computation of slab-column connection with similar column.