钢筋混凝土空腹夹层板剪力键的静力参数化分析

In order to analyze the static shear capacity of the shear key in open-web sandwich plate, this paper establishes the strut and tie model and finite element reference model. Comparing the calculation results of the strut and tie model with the standard formula and the calculation results of the reference model, it shows that the calculated results of the strut and tie model are close to that of the reference model, and the shear capacity of the shear key calculated by the formula is much different. Through parametric analysis, it is found that the relative compressive strength of concrete and the volumetric stirrup ratio have almost no effects on the shear strength of shear key. The ratio of longitudinal reinforcement, relative height of top rib and shear span ratio are more influential than other parameters, multiple regression analysis of these parameters is carried out, and the formula for calculating shear strength of shear key based on the strut and tie model is obtained.