Research On Hybrid Damping Structure Optimization Design And Seismic Research Based On The Performance

With the development of the society and people’s living standard rise, the earthquake loss to mankind is more and more bigger, the traditional seismic design method cannot meet the needs of people.Shock absorption technology arises at the historic moment under this background. Many countries have invested a lot of money to study shock absorption technology, and write their own standard clauses based on the results of the study, the code for seismic design of buildings in our country has increased the chapters about energy dissipation damping design, thus energy dissipation structure damping technology application will be the trend of the times.The problem of L-shaped eccentric frame structure with irregular plane was studied by installing buckling-restrained brace and viscous damper in outer frame, Translation-torsional coupling dynamic equation of eccentric structures was established with series-parallel mass model and a three-dimensional model of the National Engineering Laboratory was built by using the finite element method. Studied the shock absorption effect of frame structure of l-shaped eccentricity by buckling-restrained brace and viscous damper hybrid energy dissipation.The main research contents include the following four aspects:(1) Firstly illustrates the purpose of this study and its social significance, discussed the domestic and international numerous scholars support of viscous dampers and buckling-restrained brace of theoretical research and practical application.The buckling-retrained brace constraints support structure, the calculation of the kernel element stiffness and its advantages and disadvantages are explained briefly.Introduced the basic characteristics of viscous dampers from the type, structure, restoring force model these three aspects.(2) Studied how to built the viscous dampers and buckling-restrained brace in Midas Gen.Introduced the constitutive relation of buckling-retrained brace and the finite element model, and in the software modeling kernel unit is built in the different kind to studied the effect of energy dissipation.(3) In software, respectively set up 6,12,20 layers frame structure calculation model,choose story drift as objective function of optimal placement, use step by step a layout method and consider one-way seismic action only, studied the optimal placement of viscous dampers in the frame structure strategy.(4) Using Midas Gen finite element model to established a ten layer building of national engineering laboratory as an example.In allusion to the problem of the plane irregular 1-shaped eccentric framework.Firstly explore the optimal placement of the buckling-restrained brace in the structure of eccentric.Then analysis of the structure without control, BRB shock absorption, BRB mixed with viscous damper damping dynamic response of the three situations, the ratio of torsion period to translation period, torsional displacement ratio, story drift and maximum story shear of structure were analyzed comparatively. The results showed that buckling-restrained brace can control the ratio of torsion period to translation period, torsional displacement ratio well, and viscous damper can greatly reduce the structural story drift, maximum story shear. The damping effect is quite obvious.