Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Debonding in Bonded Concrete Overlays Over Continuously Reinforced Concrete Pavements
Field evaluations of bonded concrete overlay (BCO) performance reveal that debonding between old and new concrete is responsible for distresses in BCO. An in-depth investigation is needed to fully understand debonding mechanisms and their effects on distresses in BCO. A literature review conducted as part of this study revealed that, although most currently available BCO design procedures recognize the importance of attaining a perfect bond between the overlay and the substrate, they do not address this aspect directly. Therefore, this study is aimed at investigating the mechanics of debonding under environmental loading at early ages and, based on an evaluation of these mechanisms, at developing a model capable of determining the extent of debonding for a variety of material, structural and environmental conditions. To that end, two 2-dimensional finite element models were developed. These models characterize debonding from the perspective of reflective cracks and nonreflective (top-down) cracks. The evaluation of analysis results demonstrates that the most critical scenario is debonding in non-reflective cracks. Next, the behavior of BCO was investigated through sensitivity analysis.
Debonding in Bonded Concrete Overlays Over Continuously Reinforced Concrete Pavements
Field evaluations of bonded concrete overlay (BCO) performance reveal that debonding between old and new concrete is responsible for distresses in BCO. An in-depth investigation is needed to fully understand debonding mechanisms and their effects on distresses in BCO. A literature review conducted as part of this study revealed that, although most currently available BCO design procedures recognize the importance of attaining a perfect bond between the overlay and the substrate, they do not address this aspect directly. Therefore, this study is aimed at investigating the mechanics of debonding under environmental loading at early ages and, based on an evaluation of these mechanisms, at developing a model capable of determining the extent of debonding for a variety of material, structural and environmental conditions. To that end, two 2-dimensional finite element models were developed. These models characterize debonding from the perspective of reflective cracks and nonreflective (top-down) cracks. The evaluation of analysis results demonstrates that the most critical scenario is debonding in non-reflective cracks. Next, the behavior of BCO was investigated through sensitivity analysis.
Debonding in Bonded Concrete Overlays Over Continuously Reinforced Concrete Pavements
L. Lahitou (Autor:in) / S. C. Choi (Autor:in) / M. Won (Autor:in)
2008
65 pages
Report
Keine Angabe
Englisch
Early-Age Behavior of Concrete Overlays on Continuously Reinforced Concrete Pavements
| British Library Online Contents | 2003
Bonded Concrete Overlays for Rehabilitation of Continuously Reinforced Concrete Pavement
| British Library Conference Proceedings | 1993