The Hysteretic Energy Demand Distribution Along The Height Of The Single Diagonal Centrically Braced Steel Frame And Its Influencing Factors

Because of the good loading-resisting rigidity and its relatively simple structure, the centrically braced steel frames (CBSF) were widely used in the earthquake region.In this paper, ABAQUS finite element software was applied to the nonlinear dynamic analysis of elastic- plastic on the 10 storeys,15 storeys,20 storeys of the single diagonal centrically braced steel frame structure, to analyze the hysteretic energy demand distribution along the structural height by using 20 far-fault earthquake ground motions(EQGM) and 10 near-fault earthquake ground motions.The contrast analysis on the results of the structure under the action of the far-fault earthquake ground motions, near-fault earthquake ground motions is used to investigate the effects of the near-fault earthquake ground motions’ pulse.This paper also considers some others factors when analyzing the hysteretic energy demand distribution along the structural height, such as the amplitude of ground motions, Strong earthquake time of ground motions, essential nature vibration period, the slenderness ratio of the support, etc.Through the data regression analysis, this paper gives the calculation formula of the hysteretic energy demand distribution along the structural height.