Experimental and numerical study on the residual strength of deteriorated prestressed concrete bridge beams affected by chloride attack

Author(s): Y. Tanaka, T. Shimomura, T. Yamaguchi
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 225 - 226
Total Pages: 2
Language: English

Abstract: 
In this research, corroded prestressed concrete beams, which had been in service for 35 years in coastal area, were selected as a research object. Four beam specimens were loaded in a flexural or in a shear test to investigate the residual load carrying capacity of corroded prestressed concrete beams. Not only maximum load but also failure mode depended on the distribution of corrosion. Through the measurement of weight loss of PC strands, it was clear that the strands were completely destroyed due to the corrosion in some positions. As a result of these experimental works, it is clear that the average weight loss of prestressing steel is somewhat correlated with the area of cracks per unit concrete area. Analytical studies were conducted to simulate the remaining strength. By taking the development length into consideration, both flexural failure load and shear strength are predicted reasonably.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00