Mechanical Performance of High-Strength Bolt Connections in Steel Truss Bridge Nodes Based on Refined Finite Element Analysis
This article focused on the node connection method of the large-span steel truss bridge in the north connection of Changtai Bridge.A refined finite element method was used to establish an analysis model of high-strength bolt connection specimens,exploring the mechanical performance of bolts and steel plates under uniaxial tension.Based on the experimental results in relevant literature,the characteristics of the static friction stage,sliding stage,and compression stage of high-strength bolt connection specimens under axial tension were analyzed using load displacement curve analysis,and the accuracy of the finite element model was verified.The finite element simulation method was used to explore the effects of steel grade,friction coefficient,pre-tension,and bolt missing on the shear bearing capacity of high-strength bolt connection specimens.Based on the strength envelope method,a calculation method for the strength of bolted connections was provided.
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