RC Frame Connections Rehabilitated by Jacketing
Publication: Journal of Structural Engineering
Volume 119, Issue 5
Abstract
The behavior of frame connections repaired and/or strengthened by jacketing was assessed experimentally. Four slab‐beam‐column joints were constructed and rehabilitated. The specimens were tested under bidirectional cyclic loading that simulated earthquake‐type motions. Variables were the jacketed element, level of damage of the existing structure prior to rehabilitation, and layout of jacketed column reinforcement. Test results indicated that jacketing was effective to rehabilitate the existing structure. The strength, stiffness, and energy dissipation characteristics of the existing structure were improved considerably by the jackets. The strength corresponding to joint failure, based on current recommendations for design of beam‐column joints, was exceeded by all the specimens. In this test series, no detrimental effect was found in the use of bundles in the jacketed column reinforcement. However, it is preferable to use distributed bars around the column perimeter to avoid bond failure. Finally, the construction of column jackets was done quite easily; however, beam jacketing required large and heavy forms as well as artful detailing during construction, features that might be uneconomical for U.S. practice.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 119 • Issue 5 • May 1993
Pages: 1413 - 1431
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Apr 6, 1992
Published online: May 1, 1993
Published in print: May 1993
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