Cyclic Kesfonse of Concrete Bracing Members
Publication: Journal of Structural Engineering
Volume 115, Issue 1
Abstract
The paper presents the hysteresis behavior of axially loaded reinforced concrete bracing members. The object was to study the reduction in stiffness in relation to the number of cycles and the energy dissipation capacity. An existing ´compression‐only loading syste was modified to provide tension‐compression cyclic loading. Eight specimens were tested, each having an effective length to the least lateral dimension ratio of 20 or 30. The effects of longitudinal steel, slenderness ratio, and confinement of concrete are analyzed in this paper. It is concluded that reinforced concrete bracing specimens possess considerably more strength and stiffness in compression than in tension. The initial stiffness in tension varied between 28–36% of the secant stiffness, based on the transformed concrete area. The stiffness in tension cycles varied between 13–140% and in compression cycles between 30–400% of the initial tension stiffness. A simple triangular hysteresis model is proposed that accounts for different elastic stiffnesses in tension and compression, stiffness degradation, and pinching‐in effects.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 115 • Issue 1 • January 1989
Pages: 51 - 68
Copyright
Copyright © 1989 ASCE.
History
Published online: Jan 1, 1989
Published in print: Jan 1989
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