首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Development of duration‐dependent damage‐based inelastic response spectra
Authors:Saman Yaghmaei‐Sabegh  Sahar Makaremi
Institution:Department of Civil Engineering, University of Tabriz, Tabriz, Iran
Abstract:A simple relationship is proposed in this paper to construct damage‐based inelastic response spectra including the effect of ground motion duration that it can be used for damage control in seismic design of structures. This relation is established for three groups of ground motions with short‐duration, moderate‐duration, and long‐duration ranges. To develop the model, the duration effect is included in the cyclic ductility of structures by an energy‐based method, and then strength reduction factors are computed based on this modified ductility (named urn:x-wiley:00988847:media:eqe2830:eqe2830-math-0001). The strength reduction factors were calculated for 44 stiffness‐degrading oscillators having vibration periods between 0.05 and 4.0 s, four ultimate ductility capacities, and five damage levels subjected to 296 earthquake records. The results showed that ductility capacity, damage level, and ground motion duration are effective parameters in the energy dissipation of structures, which affect the urn:x-wiley:00988847:media:eqe2830:eqe2830-math-0002 spectra. The urn:x-wiley:00988847:media:eqe2830:eqe2830-math-0003 values of short‐period oscillators (e.g., low‐rise structures) under short‐duration records are generally greater than those under moderate‐duration and long‐duration records. Residual analysis has been made in terms of magnitude and distance to examine the validity of the proposed simple expression. Finally, the introduced urn:x-wiley:00988847:media:eqe2830:eqe2830-math-0004 spectra were compared with three previously published proposals. Copyright © 2016 John Wiley & Sons, Ltd.
Keywords:inelastic response spectra  strength reduction factor  earthquake ground motion duration  damage level  ductility capacity
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号