Viscous Damper And BRB Region Hybrid Energy Dissipation Damping Research

In recent years,the building structure is more and more used in energy dissipation device on the structure of energy dissipation design,the application of viscous dampers and BRB are more widely,through reasonable arrangement design both in the structure,energy dissipation can get better results.Therefore,this paper focuses on the research of the structural arrangement of the viscous damper and BRB in the structure of the mixed damping.The main contents are as follows:1.The establishment of the 30 layer frame-core tube structure model by ETABS finite element software,and the set H type steel support(reinforcing layer),BRB,viscous damper,the formation of three different structures,comparing the three kinds of structure earthquake resistance in small earthquake,earthquake,large earthquake can.The results show that BRB or viscous damper is arranged in the frame-core tube structure,can obtain better properties than the seismic strengthening layer;control effect of BRB on the structure of the lateral displacement is better than that of viscous dampers,but viscous damper on seismic energy dissipation capacity of more than BRB.2.The viscous damper together with BRB installed on the frame-core tube structure,get 4 different hybrid scheme,in order to contrast with the hybrid scheme,were designed only a damper damper structure and BRB structure,6 kinds of scheme for seismic response analysis of under the action of small earthquake,large earthquake.The results showed that:in the small earthquake,the hybrid damping structure seismic performance between BRB structure and viscous damper structure;under large earthquake,the hybrid damping structure of the damping layer displacement angle control effect is better than that of the viscous damper damping structure,hybrid damping structure on the base shear and the maximum acceleration peak value of the vertex is better than the BRB control structure and the viscous damper structure;in 4 hybrid scheme,when the structure of the floor shear force and base shear for the vibration control of the target,scheme 1 is the best,when the structure of the interlayer displacement angle,displacement,acceleration for damping control vertex target,scheme 2 is he best.3.In the 14 layer of frame-shear wall structure as the research object,the common set of viscous dampers and BRB,get 4 different hybrid scheme,and design a damper only viscous damper structure and BRB structure.The seismic response results of 6 kinds of structures under small earthquake and large earthquake are compared.The research shows that under small earthquakes,the 4 kinds of hybrid damping structure seismic performance between BRB structure and viscous dampers structure,4 kinds of hybrid damping structure,the damping effect of scheme 2 is the best;under the large earthquake,in 4 kinds of hybrid damping structure,BRB structure and viscous damper structure.The best control effect of top floor biggest displacement,the maximum floor displacement angle,the foundation bottom shear peak is scheme 2.4.In order to further analyze the effect of viscous dampers and BRB on the hybrid damping effect of frame shear wall structure,Using finite element software SAP2000,the elastic-plastic time history of the scheme 2 is compared with that of the original structure.The research shows that the mixed damping of frame shear wall structure with viscous dampers and BRB,not only can reduce the number of frame of the plastic hinge,but also can reduce the damage degree of the plastic hinge,but the control effect of the maximum stress for the concrete shear wall layer and reinforced layer is not obvious.