Research On Seismic Mechanism Of The Composite Frame Connected With Beam And PEC Column In Weak Axis Dissipating Energy With Friction

Steel-concrete composite structure has the characteristics of steel structure and reinforced concrete structure,through the rigorous design can make this kind of structure equipped with the high tensile strength,good plasticity and steel concrete compressive performance good characteristic and make this kind of composite structure equipped with the cross section area which is small,high bearing capacity and pretty good rigidity,good seismic performance,less construction time,good fire resistance and corrosion resistance and many other variety of advantages.The type of steel beam connection with PEC column(column weak axis)dissipating energy with Friction was born under the background of this frame Structure forms: since the reset Structure(Self-Centering Structure,called SC structure)belongs to the ductile Structure,has good seismic performance.when the earthquake strike,this structure can be effectively reduced the residual lateral movement of each story;New PEC column with the edge curved is that have the thin wall steel plate welded into the framework with the shape of ‘H',and to set a certain length of the edge on the flange batten by narrow and thin steel plate.Then the steel frame will has the character of small size limitation high level of lateral stiffness and anti-earthquake ductility and other good advantages with concrete cast.The self-resetting structure system of this paper is to combine the SC structure and the new type edge PEC column into the whole by means of the high strength screw and auxiliary energy dissipating connection components,so that they can exert their respective advantages in synergy.Due to the reason of the time of lab has filled fully,and there is no time for this experiment,so this study can only be evaluated by finite element software ABAQUS 6.13.The model is narrowed into a half of the real model.By changing initial prestress value of high pretension friction screw,Length of the hole of the T-shaped member,the length of the screw with high strength of pretension,the force of friction,the vertical force on the new edge PEC pillars,it produced two major categories in a total of 9 simulated specimen,and analysis of the influence on these design parameters of the framework.The conclution shows: increase of high strength bolt initial prestress can help the reset of the specimens;To change the opening length of the t-shaped web,it can flexibly control the process of the specimen entering the pressure-bearing mode.The length of prestressed tendon has a great influence on the plastic development of the structure.The friction coefficient of t-shaped parts can be increased to improve the energy dissipation capacity.The second-order effect of the new type edge PEC column has no significant effect on the seismic performance of the whole structure.Based on the model of the bearing capacity of the specimens,connection performance,energy dissipation capacity,resistance to collapse mechanism and the reset efficacy,this evaluetion analyzed the seismic performance of the structure.its research results will be helpful to future test and engineering application...