Cumulative Cyclic Deformation Capacity of Circular Tubular Braces under Local Buckling
Publication: Journal of Structural Engineering
Volume 137, Issue 11
Abstract
Tubular-section members are commonly used as seismic-resistant braces because they have a higher moment of inertia than open cross sections of equivalent area. However, the cumulative cyclic deformation capacity of tubular sections after buckling is smaller than that of open sections, such as H-shaped sections, because fracture is initiated by local buckling of circular tubular sections. To evaluate the seismic performance of such diagonal braces, it is essential to predict the cumulative cyclic deformation capacity of these braces before any fracturing. In this study, the cumulative cyclic deformation capacity of circular tube braces under local buckling was assessed by performing cyclic loading tests for a range of slenderness and diameter-to-thickness ratios. The mechanism of strain concentration in the tubular braces was studied in various types of analysis, and a method is proposed for assessing the cumulative deformation capacity before fracture based on the entire axial deformation of the braces.
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Information
Published In
Journal of Structural Engineering
Volume 137 • Issue 11 • November 2011
Pages: 1311 - 1318
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Oct 28, 2009
Accepted: Jan 3, 2011
Published online: Jan 5, 2011
Published in print: Nov 1, 2011
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