Multi‐layered energy absorber frames for tall buildings under high‐speed impact

Abstract

Based on the advanced fractional derivative damping theory for vibration of large systems and the flexible surfaceto-surface advanced contact theory, a new design strategy has been presented to deal with the high-speed impact of flying objects into tall buildings. Using a multi-layered frame system with external energy absorber frame and a new individual grid-stiffened flooring system (IGSF), a new system has been design to resist the initial impact force and the progressive collapse phenomena. The system can also guide the heat waves caused by the explosion using a special frame system. These characteristics of the new design method have been shown graphically using a full documented numerical example, which highlights the efficiency of the new multi-layered frame system under high-speed impact. The advanced flexible surface-to-surface contact theory is used to model the actual initial impact force and the advanced fractional derivative damping theory is used to obtained the energy absorption characteristics of large-scale dampers used in the external frame system. The purpose of this paper is to present a new design method, which improves the resulting dynamic responses of a tall building induced by a high-speed impact of a flying object.