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Title: Assessment of bonded post-tensioned concrete with ruptured tendons
Author: Abdelatif Mohammed, Amged Osman
Awarding Body: University of Nottingham
Current Institution: University of Nottingham
Date of Award: 2013
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Prestressed concrete was introduced in the early part of the last century and has been used in a wide range of bridge structures. It is classified into two types; pre-tensioned and post-tensioned concrete (i .e. bonded and un-bonded post tensioned concrete). Both types have proved to be a durable and economical form of construction. However, many bonded post-tensioned concrete bridges have exhibited rupture of their tendons due to corrosion. In a few extreme cases this has led to structural collapse. While much of the effort has been focused on developing corrosion detection techniques, little attention has been paid to assessing the structural behaviour of bonded post-tensioned concrete bridges with ruptured tendons. A ruptured tendon is able to re-anchor into the surrounding materials and to contribute to the structural behaviour of the corroded structure. The tendon re-anchorage has been approximated in a number of structural assessment studies using pre-tensioned concrete models or empirical bond-slip relations. In some studies, reanchoring of the ruptured tendon is completely neglected. This is attributed to the lack of models regarding the tendon re-anchorage in post-tensioned concrete. The wrong estimation of the re-anchoring phenomenon of the ruptured tendon leads to an inaccurate prediction of the structural capacity of post-tensioned concrete structures after the rupture. The aim of this research is to predict the residual structural capacity of post-tensioned concrete beams with a ruptured tendon developing a re-anchorage model of the ruptured tendon.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available