闭口截面压型钢板组合楼板纵向剪切粘结承载力研究

Longitudinal shear-bond bearing capacity study of cold-formed steel deck and concrete composite floors

参照美国ASCE组合楼板结构设计规范提出的标准试验方法,采用不同厚度和不同剪跨的试件进行连续加载,对比其纵向剪切粘结破坏形态及受力性能,发现纵向剪力对小剪跨组合板的破坏有较大的控制作用。采集试验数据并进行回归分析,得到以混凝土抗拉强度值ft表征的试验板型剪切粘结系数m,k,进而提出相应的组合楼板纵向剪切粘结承载力计算公式,为工程应用提供参考。试验表明此类压型钢板与混凝土协调工作较好,且延性较大,能够在实际工程中投入使用。

This paper refers to the normative test method advanced by American ASCE Standard for the Structural Design of Composite Slabs,to use ranges of thickness and shearspanlength,compare of the failure mode under the continuous loading.It show that the longitudinal shearing have greater control function to the shorter shearspanlength test specimen.According to practical dataes,the shear-bond coefficients m k whichs are characterized by concrete tension strength ft and the equation for calculating the longitudinal shear-bond bearing capacity is advanced in regression analysis.Experiment results show that this type of cold-formed steel deck has better cooperative capability with the concrete and displacement ductility.So it can be used in engineering.