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Analytical studies on externally post tensioned concrete girders with existing shear cracks

conference contribution
posted on 06.12.2017, 00:00 by Thuraichamy Suntharavadivel, T Aravinthan
In recent years, the important of the maintenance, rehabilitation, and strengthening of reinforced concrete bridges has increased due to various factors including increase in traffic volume and weight, structural aging and exposure to adverse environmental conditions. External post tensioning is a suitable technique for rehabilitation or strengthening of concrete bridges. While external post tensioning have been effectively used for the flexural strengthening of existing bridges, recent experimental investigations have shown that the efficiency of the shear strengthening using external post tensioning is significantly reduced by the existing shear cracks. The effect of the existing shear cracks is a complex function depending on a number of parameters including width of the cracks, crack inclination, shear reinforcement ratio and concrete strength. In order to analytically investigate the effect of such shear cracks in externally post-tensioned bridge members, numerical analysis was carried out using ABAQUS software. This paper focuses on a simply supported reinforced concrete girder strengthened by external tendons with existing shear cracks. The accuracy of this type of analytical modelling is verified by comparing with the experimental results conducted on similar reinforced concrete girders.

History

Parent Title

Conference proceedings, 23rd Biennial Conference of the Concrete Institute of Australia, 18-20 October 2007, Adelaide, South Australia.

Start Page

689

End Page

697

Number of Pages

9

Start Date

01/01/2007

ISBN-10

0909375763

Location

Adelaide, South Australia

Publisher

The Institute

Place of Publication

Rhodes, N.S.W.

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Conference; University of Southern Queensland;

Era Eligible

Yes

Name of Conference

Concrete Institute of Australia. Conference

Exports

CQUniversity

Exports