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http://dx.doi.org/10.12652/Ksce.2013.33.3.843

Experimental Evaluation for Ultimate Flexural Behaviors of PSC beams with A Corroded Tendon  

Youn, Seok-Goo (Department of Civil Engineering, Seoul National University of Science &Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.33, no.3, 2013 , pp. 843-854 More about this Journal
Abstract
This paper presents experimental research work for the evaluation of ultimate flexural behaviors of prestressed concrete beams with a corroded tendon. In order to evaluate the effects of loss of prestress or loss of tendon area on the ultimate flexural strength of prestressed concrete beams, static load tests are conducted using five prestressed concrete beams. After exposing prestressing tendons in two test beams using 25mm drill bit, the exposed tendons were corroded using an accelerating corrosion equipment to simulate loss of tendon area. During the tests, steel strains, concrete strains and displacements at the center of test beams were measured, and acoustic emission measurements were conducted to detect wire fractures. Based on the test results, evaluation method for predicting flexural strength of prestressed concrete beams with corroded tendons is investigated. In addition, evaluation methods for predicting the existence of corroded tendons in post-tensioned prestressed concrete beams at service loads are discussed.
Keywords
Bridges; Prestressed concrete; Flexural strength; Corrosion; Acoustic emission;
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