New Structural Joint by Rebar Looping Applied to Segmental Bridge Construction: Fatigue Strength Tests
Publication: Journal of Bridge Engineering
Volume 18, Issue 11
Abstract
The objective of this research has been to design, develop, and evaluate experimentally a modified type of construction joint of limited length between concrete slab segments. The design concept is based on an anchorage hook of reduced development length stiffened by transverse reinforcement bars. The purpose of this paper is to investigate the mechanical behavior of the joint in terms of stiffness and strength for an application that requires high durability, which often leads to serviceability problems such as cracking and water leakage at transverse joints. This can regularly appear in bridges. Additionally, bridge decks are structures that are subjected to repeated loading such as traffic loads, making it necessary to evaluate the behavior of joints under fatigue load. Therefore, studies focusing on the strength, stiffness, and serviceability of the joints must be carried out. This paper investigates experimentally the fatigue behavior and strength of loop joints with regard to the loop bar diameter, loop joint width, and applied load ranges. These results were compared with the behavior of RC slabs without joints. A total of eight slabs were fabricated for fatigue loading tests, and the failures of the different specimens (with loop joints and without) were obtained. From the test results, the mechanical behavior of the slabs with loop joints was confirmed to be similar to that of the slabs without joints. The experimental loop joint design was found to perform correctly under fatigue loads.
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Acknowledgments
This study has been funded by the Spanish Ministry of Education as a part of the research project BIA2006-15471-C02-01. The authors also thank the Spanish Ministry of Education for financial support under grants BIA2007-28685-E and BIA2010-16332.
References
ASTM. (1999). “Standard practices for cycle counting in fatigue analysis.” E1049-85, West Conshohocken, PA.
British Standards Institution (BSI). (2007). “Design of concrete structures. Concrete bridges. Design and detailing rules.” BS EN 1992-2:2005, London.
Bruggeling, A. S. G., and Huyghe, G. F. (1991). Prefabrication with concrete, Balkema, Rotterdam, Netherlands, 46–49.
Deutsches Institut für Normung. (1988). “Beton und Stahlbeton: Bemessung und Ausführung.” DIN 1045, Beuth, Berlin (in German).
Hsu, T. T. C. (1981). “Fatigue of plain concrete.” ACI J., 78(4), 292–305.
International Federation for Structural Concrete (FIB). (2010a). “Model Code 2010.” Vol. 1, Lausanne, Switzerland.
International Federation for Structural Concrete (FIB). (2010b). “Model Code 2010.” Vol. 2, Lausanne, Switzerland.
Lambotte, H., Baus, R., and Motteu, H. (1965). “Essais de flexion sour poutres en béton armé.” Rapport de recherche nos. 1-3, Centre scientifique et technique de la construction, Brussels, Belgium (in French).
Leonhardt, F., and Mönnig, E. (1977a). Vorlesungen über Massivbau - Teil 3: Grundlagen zum bewehren im Stahlbetonbau, Springer, Berlin (in German).
Leonhardt, F., and Mönnig, E. (1977b). Vorlesungen über Massivbau - Teil 1: Grundlagen zum bewehren im Stahlbetonbau, Springer, Berlin (in German).
Miner, M. A. (1945). “Cumulative damage in fatigue.” J. Appl. Mech., 67(1), 159–164.
Ministerio de Fomento. (2008). “Instrucción del hormigón structural.” EHE-08, Madrid, Spain (in Spanish).
Ministerio de Fomento. (2011). “Instrucción sobre las acciones a considerar en el proyecto de puentes de carretera.” IAP-11, Madrid, Spain (in Spanish).
Oh, B. H., and Kim, S. H. (2007). “Realistic models for local bond stress-slip of reinforced concrete under repeated loading.” J. Struct. Eng., 133(2), 216–224.
Ong, K. C. G., Hao, J. B., and Paramasivam, P. (2006). “A strut-and-tie model for ultimate loads of precast concrete joints with loop connections in tension.” Construct. Build. Mater., 20(3), 169–176.
Rehm, G., and Eligehausen, R. (1979). “Bond of ribbed bars under high cycle repeated loads.” ACI J., 76(15), 297–309.
Ryu, H. K., Kim, Y. J., and Chang, S. P. (2007). “Experimental study on static and fatigue strength of loop joints.” Eng. Struct., 29(2), 145–162.
Schläfli, M., and Brühwiler, E. (1998). “Fatigue of existing reinforced concrete bridge deck slabs.” Eng. Struct., 20(11), 991–998.
Villalba, S. (2011). Diseño y validación experimental de uniones tipo “loop joints.” Uniones mediante superposición con lazos en viaductos de hormigón con sección transversal evolutiva, Editorial Académica Española, Saarbrücken, Germany (in Spanish).
Zanuy, C., Albajar, L., and De la Fuente, P. (2009). “Sectional analysis of concrete structures under fatigue loading.” ACI Struct. J., 106(5), 667–677.
Zhu, P., Zhongguo, J. M., and French, C. E. (2012). “Fatigue evaluation of longitudinal U-bar joint details for accelerated bridge construction.” J. Bridge Eng., 17(2), 201–210.
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Information
Published In
Journal of Bridge Engineering
Volume 18 • Issue 11 • November 2013
Pages: 1174 - 1188
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Apr 29, 2012
Accepted: Oct 25, 2012
Published online: Oct 29, 2012
Published in print: Nov 1, 2013
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