The Improved Elastic Stiffness Method Based on Energy Dissipation System with Buckling Restrained Brace Design

This paper brings up the improved elastic stiffness method to the energy dissipation system with buckling restrained brace design in high-rise buildings and super high-rise buildings, Introducing amplification factor technology by improving the original elastic stiffness method can amplify seismic action regularly and the iteration was notably reduced by the seismic action which was calculated from the amplified coefficient so that solving the problem of relatively slow iterative speed. According to the demand of displacement limit value and the stiffness distribution in main structure, the demand of lateral stiffness in general structure can be directly worked out so that it can get the effective stiffness which should be added to the energy dissipation with buckling restrained brace. By the practical engineering example which height of frame-core tube is 144m, the design steps and user principles of the method are clearly illustrated. Meanwhile the application of response spectrum method on the basis of the elastic stiffness is expanded.