Study On The Effect Of Joint Stiffness On Hysteretic Behaviors Of Steel Staggered Truss Structure

The fabricated staggered trusss tructure has good the development of space in tall buildings for its Economic, applicable, efficient, good load carrying capacity, lateral stiffness, good ductility and energy dissipation capacity. C hord-column joint rotational stiffness will influence the mechanical behavior and hysteretic behavior of the fabricated staggered trusss tructure System. By using finite element analysis research and theoretical research, this dissertation study on the mechanical behavior of the fabricated staggered trusss tructure. By using the finite element software ABAQUS this dissertation simulates four parameters the fabricated staggered trusss tructure model of the joint rotational stiffness, dimensions of the middle panel of truss, dimensions of truss span and dimensions of truss height. The chord-column connection of the fabricated staggered truss system is simulated in finite element modeling method. Using results of relevant the experiment verifies the correction of finite element models. the mechanical behavior of structure models BASE under vertical and horizontal loads is analyzed. To explore the joint rotational stiffness, dimensions of the middle panel of truss, dimensions of truss span and dimensions of truss height affects the load displacement curves, layer displacement angle, the hysteretic behavior of structure. The analysis results are listed as follows:(1)the joint rotational stiffness has a little effect on the yield load and the bearing capacity of the fabricated staggered truss tructure system. With the increase of joint rotational stiffness, the yield load and the bearing capacity will increase slightly. The joint rotational stiffness has a influence on the lateral stiffness and layer displacement angle. With the joint rotational stiffness increases, layer displacement angle decreases. it has a little effect on the hysteretic behavior of structure. With the increase of joint rotational stiffness, the skeleton curve is with a smaller increase.(2)Height of truss has a great influence on the structure stiffness, bearing capability, layer displacement angle and ductility. With the increase of the height of the truss, the elastic stiffness decreases, the bearing capacity decreases, but the ductility of structure is better.(3)Dimensions of the middle panel of truss has a impact on internode the structure stiffness, bearing capacity and layer displacement angle. With the increase of the middle panel of truss, lateral stiffness, yield load and bearing capacity decreases.(4)Span of truss has a great influence on the elastic stiffness, bearing capability, layer displacement angle and ductility. With the increase of the span of the truss, the elastic stiffness increases, the bearing capacity increases.