FUZZY DYNAMICAL RELIABILITY ANALYSIS AND DESIGN OF MULTI-STOREY NONLINEAR ASEISMIC STEEL STRUCTURES
Ou Jinping Niu Ditao Wang Guangyuan(Harbin Architectural and Civil Engineering Institute)
In this paper, based on the structural analysis and experimental results, a feasible method is presented for the dynamical reliability analysis and design of a multi-storey nonlinear steel structure subjected to earthquake. Firstly, by simulating the earthquake ground motion as a stationary filtered non-white noise and using the energy balance technique of equivalent linearization, the random deformation and hysteretic energy dissipation of structure are analysed and their statistical moments are obtained. Then,the fuzzy safe criterion based on the comprehensive damage index is established and the fuzzy dynamical reliability of structural storey is analysed. Furthermore, by introducing a total damage index in the structural system, a new method is presented for analysing the dynamical reliability of structural system. Finally, a method of structural design based on the dynamical reliability is presented.
【Fund】： 霍英东教育基金;; 国家自然科学基金