Razvoj numeričkog i analitičkog modela inovativnog čeličnog disipatora seizmičke energije

Abstract

Performance of an innovative steel dissipator of seismic energy applied in the passive vibration control system of buildings has been analysed in the dissertation. When determining the performance, the geometric characteristics of the energy dissipator and the physical and mechanical characteristics of the steel material have been varied. The analyses were performed on the sophisticated numerical computational models developed using the Finite Element Method. The numerical model was validated against the available experimental test results of the energy dissipator components. It has been proven that the innovative steel dissipator of seismic energy has significant nonlinear hysteretic performance, whereby it is possible to achieve significant seismic energy dissipation. Based on the analyses, conclusions were drawn regarding the influence of the geometric and material parameters on the performance of energy dissipator and recommendations for its application in engineering practice were given. In order to obtain the response of energy dissipator to monotonically increasing load an analytical model was developed. This model is also used to define the parameters for describing the idealized response to monotonically increasing as well as to cyclic loading, which is the starting point in the analysis of seismically isolated buildings using the proposed energy dissipator. Using the example of an isolated structure, with the direct dynamic analysis in time domain, the efficiency of energy dissipator was confirmed in terms of reducing seismic forces and relative interstorey drift ratio during real and artificial earthquakes accelerogram in relation to the case of rigid foundation of the structure.