铝合金板式节点受弯滞回性能试验研究OA北大核心CSTPCD

To study the bending hysteresis performance of aluminum alloy gusset joints and compare them with static performance,four full-scale specimens were tested and subjected to hysteresis and monotonic loading,and the entire experimental loading process was numerically simulated using the general finite element software package ABAQUS.The failure mode,bending moment-rotation angle relationship,and energy dissipation capacity of aluminum alloy gusset joints were studied.Adopting the symmetrical loading method,the joint area is a pure bending segment.The research results indicate that the aluminum alloy gusset joint is a typical semi-rigid joint,and its destructive process can be divided into elastic stage,bolt slip stage,bolt and screw hole extrusion stage,and failure stage.The relationship curve of bending moment and rotation angle is obtained.The failure mode of the joint is the fracture of the member end section,and the crack begins to expand from the outermost row of screw holes at the end of the member.The joint has no obvious warning before failure and it's a typical brittle failure,with no decreasing load.The skeleton curve of joint is similar to the monotonic loading curve,but due to the accumulated damage of the joint during the hysteresis loading process,the ductility is lower than that of monotonic loading.Increasing the number of bolts can improve the energy consumption performance of the joint and make the hysteresis loop fuller.