Analysis on Mechanical Properties of Bolt Connector under Reinforcement Binding and Welding Conditions Considering Flexural-shear Ratio

Abstract

In order to study the force transmission mechanism of the connection interface between the corrugated steel web and the concrete diaphragm in the corrugated steel web composite girder bridge, the internal force of the bolt shear connector under the coupling of different flexural-shear ratio was compared, the simple support beams model under different steel rebar arrangements and different loading positions were designed. Based on the force characteristics of the bolt shear connector, taking a Bridge as the engineering background, and using the finite element analysis software ABAQUS to establish a simple support beam model. The analysis compares the stress of steel bar and steel plate under the coupling action of different flexural-shear ratio, the stress of steel bar and steel web under the connection method of binding or welding of steel bar, the stress of bolts and the load-slip curve of bolts were also compared. The analysis results show that the reinforcement arranged in the diaphragm can significantly improve the ultimate bearing capacity of the overall structure by welding with the diaphragm, effectively improve the stress distribution of the bolt, reduce the stress value of the connection between the bolt and the steel plate, and improve the shear resistance of the bolt. With the wide application of corrugated steel webs, more attention should be paid to the force transmission performance of the connection interface between the steel webs and the concrete diaphragm in the engineering design process. The research results can be used for the design calculation of the connection between the corrugated steel web composite beam bridge and the diaphragm in the future, and provide reference for engineering application.