Performance Based Optimal Human Comfort Design of Toggle-Brace-Damper System for Super Tall Buildings

With the increase of building height, the super tall building structure will be flexible and slim. The structural natural frequency of super tall building is quite close to the predominant frequency of strong wind, and the building acceleration induced by wind load become increasingly prominent. The toggle brace damper system has been proved to be an effective motion amplification device, which can amplify the damper displacement under wind load, and can thus improve the efficiency of the viscous dampers dramatically. In this paper, a new optimal design method for finding the optimal placements, number and parameters of toggle brace dampers is proposed for satisfying human comfort performance requirements under wind loads. The theoretical basis and design process for finding optimum geometry parameter and damping coefficient of the toggle brace damper system are also developed. A real 250 meter super tall residential building project will be employed to illustrate the effectiveness and applicability of the proposed performance based optimal human comfort design method of toggle brace dampers for super tall buildings.