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原文传递 Stiffness-Based Design for Mitigation of Residual Displacements of Buckling-Restrained Braced Frames

题名：	Stiffness-Based Design for Mitigation of Residual Displacements of Buckling-Restrained Braced Frames
其他题名：	AISC.(2005)."Seismic provisions for structural steel buildings."AISC 341-05,Chicago.
正文语种：	英文
作者：	Dipti Ranjan Sahoo
关键词：	section；connection；expression；design；criterion；systems；resistin；drifts；frame；moment
摘要：	Buckling-restrained braced frames (BRBFs) are often used as primary seismic force resisting systems to achieve the desired seismic performance of building frames. However, significant residual displacements of these systems may cause concerns on their postearthquake performance, especially under long duration earthquakes and strong aftershocks. Although backup moment frames (MFs) along with the BRBFs, referred to as dual systems, can be used to mitigate their residual interstory drifts, there is no design criterion on how to determine the section sizes in the MF for this purpose. In the research reported in this paper, a simple mitigation technique was developed, which relies on a stiffness-based design in which the residual interstory drifts can be effectively controlled by increasing the elastic story stiffness using column sections with a higher moment of inertia. Nonlinear time-history analyses were carried out on low-to-high rise BRBFs for a set of 20 design basis earthquake (DBE) level ground motions to evaluate their residual interstory drift response for both pinned and rigid beam-to-column connections. Based on these analytical results, a simple expression is also proposed for predicting the residual drift ratios of low-to-high rise BRBFs.
出版年：	2015
论文唯一标识：	P-26Y2015V141N09022
英文栏目名称：	Technical Papers
doi：	10.1061/(ASCE)ST.1943-541X.0001204
期刊名称：	Journal of Structural Engineering
拼音刊名(出版物代码)：	P-26
卷：	141
期：	09
页码：	244-256