INTEGRATED OPTIMAL DESIGN FOR BELT TRUSS USING VISCOUS DAMPERS IN SUPER TALL BUILDINGS

摘要

Viscous dampers (VD) offer additional damping to the structure and dissipate the energy during earthquake. The structure will be safer with the reduction of response and internal forces due to increase of damping. The structural members can be further optimized for considering the reduction of earthquake actions due to additional damping introduced by the installation of viscous dampers. The integrated optimal design of belt trusses using viscous dampers is addressed in this paper. The virtual work principle is first to be employed to analyze the sensitivity of design parameters of belt truss members on the design constraints. An optimal design process applied to minimize the sizes of belt truss members is then introduced. A super tall building located in high seismicity area is applied in the final part of this paper to illustrate the effectiveness of the proposed method. Numerical analysis results show that the proposed methods are reasonable and it is effective to reduce the structure cost with the improvement of seismic performance.