Research On Finite Element Simulationof H-Beam To Square Tubular Column Connections With Through-diaphragm

In recent years, the square steel tubular column and steel beam H and connection of asteel frame is more and more used in high-rise building.There are many kinds of nodes inthe form of its nodes, which have a lot of research and are widely used in the actualengineering.But in China, the research of this node is little, and has no design principle.This paper using ANSYS finite element analysis software, the simulation calculationfor through beam separator, concrete-filled square steel tube column H-shaped steel beamseparator through nodes were under the action of cyclic loading in the s tress analysis. Scaleto establish the three-dimensional finite element model, the finite element analysis andexperimental results were compared to ensure finite element modeling methods foraccurate simulation of the nodal force, to ensure the applicability of the modeling method.By changing the node of the axial compression ratio, diaphragm thickness and thediaphragm cantilever length and boltdiameter and other parameters, four series of model isestablished and the of low cyclic reversed loading, from the model should stressnephogram, load displacement curves, hysteresis back curves and skeleton curves of aseries of data, analysis of failure process of the main part of the node and the mechanicalproperties and the node bearing capacity, ductility and energy dissipation performance isevaluated.Analysis results show that: by high-strength bolt connection of square steel tubecolumn H-shaped steel beam separator through the node type has good mechanicalperformance. With the increase of the thickness of the spacer, the load bearing capacity ofthe joint is increased, and the load carrying capacity of the joint is not changed when thethickness reaches10mm.Bearing capacity of joints with increase of diaphragm thicknessincrease, and when it reaches a thickness of10mm, node load force change little, incidenceof plate buckling deformation of node ductility decreases with the increase of diaphragmthickness, bending deformation of beam flange node ductility increased with the increaseof diaphragm thickness and node energy dissipation capacity also with the diaphragmthickness increased changed for the better; Axial compression ratio, the outer diaphragmpick length and high strength bolt diameter increased, the joint bearing capacity wereimproved, but increased slightly, with the axial pressure ratio and partition pick lengthincreases, the ductility and energy dissipation coefficient all increased, with high strength bolt diameter decreases. So it is recommended that this type of joint in diaphragmthickness not less than the thickness of the beam flange, column axial pressure is betterthan should be no greater than0.4, the high strength bolt is suitable for controlling the lossrate of the flange section of the flange, and it is appropriate for25%.