1.Kunming University;2.Kunming University of Science and Technology
National Science and Technology Major Special Project of China
Based on the influence of the structural period and the damping ratio on the seismic excitation of the structure, the calculation formula of displacement reduction rate and seismic shear reduction rate of SDOF system of the combined damping structure with BRB and VD are derived and the damping performance curve is established. In addition, the performance-based design method for the structure is proposed and the validity is verified with a practical engineering example. The results show that there exists unique performance point under the case that the target displacement reduction rate and target shear reduction rate are determined, and the SDOF system of the combined damping structure could achieve excellent displacement response and seismic shear reduction control effects if designed reasonably . The calculation example structure designed according to the design method achieves the expected damping target, which again reflects the effectiveness of proposed design method.The simplified application method based on the first-order mode can be used for the combined seismic design of multi degree of freedom system with uniformly distributed mass and stiffness along the height.