Research on Shear Performance of Large Diameter Group Nails Based on ABAQUS Secondary Development
To study the shear performance of large-diameter group nails,considering the material,contact and geometric nonlinearity in the push out test of large-diameter group nails,the push out model was established by ABAQUS software.The secondary development of the model was carried out to study the influence of the strength of the reserved block material,the diameter of the stud,the height of the stud and the thickness of the flange plate of the steel beam on the shear performance of the stud.The main conclusions are as follows:when the shear resistance of bundle type large-diameter stud is increased,the warpage of steel beam flange plate is reduced,and the uneven stress of large-diameter stud is weakened,which significantly reduces the compression damage area of the reserved block.Increasing the diameter of the stud can effectively improve the ultimate shear capacity of the stud,but the compressive damage area of the concrete behind the stud root also increases significantly,and the uneven stress of the large diameter stud increases,and the group stud effect is more significant.Increasing the stud height and the flange plate thickness of the steel beam have little effect on the ultimate shear capacity of the average single nail.To reduce the warpage of the flange plate of the steel beam,it is preferred to increase the flange plate thickness of the steel beam.The research results can provide a reference for the shear design of bundled large diameter studs in steel-concrete composite structures.
steel-concrete composite bridgebundle type large-diameter studpush out testsecondary developmentshear resistance
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NSTL
万方数据
维普
