Buckling-restrained brace stability evaluation, empirical basis and design implications

B. Sitler, T. Takeuchi, R. Matsui, P. C. Lin

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

Buckling-restrained braces (BRBs) are capable of withstanding severe seismic demands without visible damage or requiring replacement. However, stability must be maintained to achieve this performance. While the restrainer design is well established, current guidance to ensure connection stability differs markedly from country to country and the recommended methods produce a wide range of predicted capacities. This is an issue that has been discussed in the commentary to AISC 341 since the 2005 edition, but the specific method of analysis is currently left to the engineer's judgement. This paper evaluates the accuracy of the stability evaluation methods currently being used by engineers in Japan, New Zealand, Taiwan and the US, based on a test catalogue of 82 specimens, 50% of which experienced out-of-plane connection buckling. This is a global mode characterized by the formation of a hinge just outside of the restrainer, with the gusset subsequently yielding to complete the collapse mechanism. Several recently proposed methods are shown to be conservative, and the critical design variable is identified as the out-of-plane rotational end fixity provided by the gusset and adjacent framing. A three-tier design procedure is proposed, with each tier producing a less conservative design, but at the cost of increased analytical effort.

原文English
主出版物標題11th National Conference on Earthquake Engineering 2018, NCEE 2018
主出版物子標題Integrating Science, Engineering, and Policy
發行者Earthquake Engineering Research Institute
頁面718-728
頁數11
ISBN(電子)9781510873254
出版狀態Published - 2018
事件11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018 - Los Angeles, United States
持續時間: 2018 六月 252018 六月 29

出版系列

名字11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy
2

Conference

Conference11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018
國家/地區United States
城市Los Angeles
期間18-06-2518-06-29

All Science Journal Classification (ASJC) codes

  • 岩土工程與工程地質

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