Seismic Performance Investigation Of Innovative Hybrid Coupled Wall System With Coupling Beam Damper

Frame shear wall structure is a widely used structure form in the traditional high-rise reinforced concrete structure, meanwhile the coupling beams plays the important role of different wall limb connection, us all the walls can work together, so the coupling beam is a important kind of energy consuming component.Coupling beams in shear wall structure suffers huge damage when againstgreater level of earthquake and assimilate a large number of seismic energy dissipation.According to Chinese earthquake damage statistical results recent years, the failure mode of traditional reinforced concrete coupling beams is usually brittle failure, shear failure, and the disadvantages of lack of energy.Domestic and foreign scholars tried a series of measure to improve the energy dissipation capacity of the coupling beams, and obtained a lot of achievements, but which means some deficiencies: a variety of novel beam reinforcement scheme is faced with complicated construction procedure, high cost so that there is no large-scale promotion of the dilemma.Given above fact,this paper propose that good mechanical properties of hysteretic damping plate as replaceable energy dissipation device, which can be located at the middle of the beam by bolt,making the deformation of the beam mainly concentrating in the damping plate, and reducing the damage on both sides of the coupling beams and shear walls and other components, which helps to form the innovative combined shear wall structure with ideal seismic performance.The main contents of this paper are as follows:1. This paper summarizes the various types of metallic dampers and the corresponding mechanics model, and hysteretic damping plate parameter setting, influencing factors and design formula, on the other hand introduce widely used element during shear wall structure simulation analysis according to the previous research.2. Layered shell element and cyclicsoftened membrane model are conducted to validate accuracy of simulating the shear wall systems based on finite element analysis software Open Sees.Then cyclicsoftened membrane model is used to study hysteretic behavior of new hybrid coupled shear wall structures, such as the impact of different parameters of the new structure model about strength, stiffness and energy dissipation.3.The layered shell element model of Open Sees software is used to study coupled shear wall structure model with dynamic history analysis, counting the distribution of floor displacement, story drift angle and story acceleration, moreover different heights of new coupled shear wall structure and traditional coupled shear wall structure are compared.4.Through the analysis of installing mild steel damping plate with different height model, it is found that acceleration control effect of 10 storey and 5 storey is great than that of 18 storey structure. In all, mild steel damping plate can limit the structure earthquake response and delay the damage of the main structure significantly, it is worth attention continuously in the future when considering 18 or more storey for applying MSDP.In conclusion, seismic performance of new hybrid combined shear wall structure is analyzed in paper, which prove that mild steel damping plate can weaken peak floor accelerations significantly, and dissipate earthquake energy in the main structure and delay structural damage.These conclusions lead to technical support and theoretical basis for new hybrid coupled shear wall structures with mild steel damping plate, which has important reference value and practical significance too.