Strengthening by Means of External Prestressing
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Volume 4, Issue 2
Abstract
This paper deals with the behavior of reinforced concrete, partially prestressed concrete, and prestressed concrete beams, subjected to cyclic loading and then strengthened by means of external prestressing. The comparison between the experimental tests and the numerical analyses shows that the load-carrying capacity of the rehabilitated structure is greater than that of the old one plus the increase needed to cancel the bending moment decrease due to the external tendons. The prestressed concrete beam tested shows that stresses in the concrete exceed the stability limit, whereas the reinforcement does not yield. In spite of the considerable increase of its load-carrying capacity under monotonic loading, the efficiency of this beam, if subjected to a load history similar to that prior to strengthening, is doubtful.
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Information & Authors
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Published In
Journal of Bridge Engineering
Volume 4 • Issue 2 • May 1999
Pages: 131 - 135
History
Received: Oct 15, 1997
Published online: May 1, 1999
Published in print: May 1999
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