| The design method based on carrying capacity is used in Code for Seismic Design of Building, without considering the influence of duration of strong earthquakes.The energy-based seismic design method considering force, displacement, duration and other factors, can give a comprehensive assessment of the degree of structural damage.In the paper, the V-type eccentrically braced steel frames with 10-layer 3-span, 15-layer 3-span and 20-layer 3-span are designed by SAP2000. The beam-shell hybrid model is used, and input motions are 20 far-fault seismic waves and 15 near-fault seismic waves with pulse effect. The main researches in this paper are summed as follows:1. The interlayer hysteretic energy and it’s distribution law, the proportion of hysteretic energy of link beam, and story drift of three models under far-fault and near-fault seismic waves of 8-degree rare earthquake are obtained. Obtained by regression analysis, a simplified formulas of the distribution coefficient of interlayer hysteretic energy of the three structures under near-fault earthquakes and far-fault earthquakes.2. The distribution law of interlayer hysteretic energy and the story drift of V-type eccentrically braced steel frames are analysed under far-fault and near-fault seismic waves, and the results show that near-fault earthquake will increase the response of bottom of the structure and V-type eccentrically braced steel frames designed according to Code for Seismic Design of Building underestimate the role of near-fault earthquake with pulse effect on structures.3. The influence of the characteristics of ground motions and structures on the distribution law of interlayer hysteretic energy is analysed. |
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