Study On Failure Mechanism Of Eccentric Braced Steel Frame Of High Strength Steel Combined Energy Consumer

High-strength steel combination of energy-consuming eccentric support steel frame is the use of high-strength steel to the eccentric support structure, and in the support of the friction-type energy amplifier installed in the role of small earthquakes, the energy consumption is not sliding without energy, support from To enhance the role of structural stiffness,earthquake situation, the energy device began to slide, and energy consumption beam common energy consumption, energy consumption consumes part of the energy consumption of beam energy, the use of energy consumption beam and consumption Energy tools to work together to reduce the deformation of energy-consuming beam, reducing the floor of the repair workload,and high-strength steel high strength, stiffness, can improve the structure of the carrying capacity and resistance side stiffness.In this paper, three kinds of eccentric support structure models with Q345 + Q460 are designed according to the relevant specifications and reference literature. The model DPH1 adopts the traditional beam-column connection method and the friction energy dissipation device is set on the support. DPH2 uses a new type of cover plate node and no friction energy dissipation device. The model DPH3 adopts the new cover plate node and sets the friction energy dissipation device. Using ANSYS finite element software, the 3D shell element and the solid element are used to establish the finite element model. Nonlinearity, the damage mechanism and seismic performance of the model under uniaxial loading and cyclic loading are studied respectively. The load-displacement curves and the hysteresis curves, skeleton curves,stiffness degradation curves, The energy dissipation energy and the equivalent viscous damping coefficient at each stage of cyclic loading are analyzed and compared. Then, the base model was selected to change the length of the steel strength, the length of the shear energy dissipation beam, the thickness of the main and auxiliary plates of the friction energy dissipation, and the thickness of the cover plate. The relevant parameters were studied for the eccentric support The failure mechanism and the seismic performance of the steel frame structure, and the following conclusions are obtained.The results show that the seismic performance of model DPH3 is better than that of model DPH1 and DPH2, and the length of energy dissipation beam is in the range of 0.499 ?0.832 ,The seismic performance of the structure is better, and the energy dissipation device and the energy dissipation beam work together well. The high energy steel combination of the new type of high-strength steel plate is used to eccentrically support the steel frame. When the steel combination of the material is used The higher the initial stiffness and the bearing capacity of the model, the worse the energy dissipation capacity. With the increase of the thickness of the main and auxiliary plates, the seismic performance of the structure is improved. With the increase of the thickness of the node cover , The structure of seismic performance slightly improved, damage mechanism has improved.