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http://dx.doi.org/10.12989/sem.2017.62.4.455

Effects of viscous damping models on a single-layer latticed dome during earthquakes  

Zhang, Huidong (Tianjin Key Laboratory of Civil Buildings Protection and Reinforcement)
Wang, Jinpeng (Tianjin Key Laboratory of Civil Buildings Protection and Reinforcement)
Zhang, Xiaoshuai (Tianjin Key Laboratory of Civil Buildings Protection and Reinforcement)
Liu, Guoping (Tianjin Key Laboratory of Civil Buildings Protection and Reinforcement)
Publication Information
Structural Engineering and Mechanics / v.62, no.4, 2017 , pp. 455-464 More about this Journal
Abstract
Rayleigh damping model is recommended in the recently developed Performance-Based Earthquake Engineering (PBEE) methodology, but this methodology does not provide sufficient information due to the complexity of the damping mechanism. Furthermore, each Rayleigh-type damping model may have its individual limitations. In this study, Rayleigh-type damping models that are used widely in engineering practice are discussed. The seismic performance of a large-span single-layer latticed dome subjected to earthquake ground motions is investigated using different Rayleigh damping models. Herein a simulation technique is developed considering low cycle fatigue (LCF) in steel material. In the simulation technique, Ramberg-Osgood steel material model with the low cycle fatigue effect is used to simulate the non-uniformly distributed material damping and low cycle fatigue damage in the structure. Subsequently, the damping forces of the structure generated by different damping models are compared and discussed; the effects of the damping ratio and roof load on the damping forces are evaluated. Finally, the low cycle fatigue damage values in sections of members are given using these damping models. Through a comparative analysis, an appropriate Rayleigh-type damping model used for a large span single-layer latticed dome subjected to earthquake ground motions is determined in terms of the existing damping models.
Keywords
viscous damping model; single-layer latticed dome; fatigue; damping force; damage;
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