Linear Elastic Fracture Mechanics Pullout Analyses of Headed Anchors in Stressed Concrete
Publication: Journal of Engineering Mechanics
Volume 136, Issue 6
Abstract
The results of research initiated in the early 1980s led to the replacement of plasticity-based design guidelines for the load-carrying capacity of headed anchors embedded in concrete with those developed using fracture mechanics. While provisions are available in the design codes that account for the presence of tensile fields causing concrete cracking, no provisions are available for anchors embedded in prestressed concrete. This paper presents the results of linear elastic fracture mechanics (LEFM) analyses and of a preliminary experimental investigation of the progressive failure of headed anchors embedded in a concrete matrix under compressive or tensile prestress. The model predicts an increase (decrease) in load-carrying capacity and ductility with increasing compressive (tensile) prestress. It is shown that despite neglecting the dependence on size of concrete fracture toughness, LEFM predicts with remarkable accuracy the functional dependence of the ultimate capacity on prestress.
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Acknowledgments
The experimental part of this research was carried out with the support of Yucatan Decima concrete precast plant and its technical staff. The staff of the Laboratorio Prove Materiali of the Politecnico di Milano is also gratefully thanked. The writer expresses his gratitude to the cowriters, to professors L. Biolzi and G. Rosati, and to D. Spinelli for their valuable advice, constant encouragement, and tireless dedication.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 136 • Issue 6 • June 2010
Pages: 761 - 768
Copyright
© 2010 ASCE.
History
Received: Jan 12, 2009
Accepted: Nov 16, 2009
Published online: Nov 19, 2009
Published in print: Jun 2010
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