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原文传递 Seismic Performance Evaluation of a New Hybrid Buckling Restrained Brace under Cyclic Loading

题名：	Seismic Performance Evaluation of a New Hybrid Buckling Restrained Brace under Cyclic Loading
正文语种：	eng
作者：	Das, Pallab Jyoti;Deb, Sajal Kanti
作者单位：	Indian Inst Technol Guwahati Dept Civil Engn Gauhati 781039 Assam India;Indian Inst Technol Guwahati Dept Civil Engn Gauhati 781039 Assam India
摘要：	This paper presents an experimental investigation on the evaluation of the seismic performance of a new hybrid buckling restrained brace (HyBRB) under cyclic load. Detailed design steps adopted for the HyBRB design arc reported in this paper. The analytical method for estimation of critical loads corresponding to buckling mode formation of the steel core inside the restrainer has been presented. The design targets achieved for the HyBRB are ease of inspection of the detachable BRB core to facilitate replacement of the steel core after a seismic event, if necessary, and enhanced energy-dissipation capacity through restrained buckling about both weak and strong axes of the core. The proposed HyBRB has displayed stable hysteretic behavior with good energy-dissipation capacity in low to high levels of the core strain range. Permanent deformation about the strong axis of the core was observed on unfastening of the restrainers, although restrained buckling of the core was observed about the weak axis in lower displacement amplitudes. Analytical simulation was carried out using a phenomenological model to simulate the experimental behavior. The simulated axial force-deformation hysteresis loops were found to be in close agreement with those obtained from experimental investigation. (C) 2022 American Society of Civil Engineers.
出版年：	2022
期刊名称：	Journal of structural engineering
卷：	148
期：	6
页码：	04022069.1-04022069.13