Evaluation of the Effectiveness of Strengthening Intervention by CFRP on MRWA Bridge No. 3014
Publication: Journal of Composites for Construction
Volume 11, Issue 4
Abstract
Main Roads of Western Australia has a continuing program of bridge upgrading, to refurbish and strengthen bridges to allow for increasing vehicle traffic and increasing axle loads. A -old, four-span reinforced concrete slab bridge was retrofitted with application of CFRP laminate strips on the top of the deck over the piers, as well as on the deck soffit in the midspan regions, to reduce high moments in both hogging and sagging. The dynamic assessment of the bridge before and after strengthening works provided the opportunity to evaluate the effectiveness of the strengthening intervention through dynamic measurements. A performance evaluation of the repaired structure was carried out through traffic loading application on the updated numerical models of the bridge, before and after retrofit. As a main observation, the addition of CFRP laminate strips led to a significant increase of the structural capacity in flexure. The paper discusses the results obtained from the dynamic-based assessment in terms of effectiveness of the strengthening intervention as well as of efficiency in using such a methodology to evaluate the capacity increase of the retrofitted bridge.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The writers would like to thank Jock Scanlon and Erica Smith of MRWA, and Peter Coughlan of BG&E. Partial financial support from the Australian Research Council, under Grant No. LP0453783 is also acknowledged.
References
Alkhrdaji, T., Nanni, A., Chen, G., and Barker, M. (1999). “Destructive and nondestructive testing of bridge J857, Phelps County, Missouri-Strengthening to failure of bridge decks (Volume I).” CIES 99–08A, Centre for Infrastructure Engineering Studies (CIES), Univ. of Missouri-Rolla, Rolla, Mo.
American Concrete Institute (ACI). (2002). “Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures.” ACI Committee 440, Farmington Hills, Mich.
BG&E (BGE). (2001a). “Bridge N. 3014 on Walkaway-Nangetty Road over Greenough River, shire of Greenough—Load rating report.” Ref. 10369.04–004/3014 Rev 1, Perth, WA, Australia.
BG&E (BGE). (2001b). “Engineering report on material testing and the implications to rated load capacity for Bridges 795,205 and 3014.” Ref. 10369.04–005 Rev 0, Perth, WA, Australia.
BG&E (BGE). (2004a). “Bridge N. 3014, Walkaway-Nangetty Road, Midwest Region, shire of Greenough—Work Summary Report.” Ref. 11285.00–037/3014 Report N.01 Rev A, Perth, WA, Australia.
BG&E (BGE). (2004b). “Engineering report on additional material testing of reinforcing steel for Bridges 795,205 and 3014.” Ref. 10369.04–008 Rev 0, Perth, WA, Australia.
Bonacci, J. F., and Maalej, M. (2001). “Behavioral trends of RC beams strengthened with externally bonded FRP.” J. Compos. Constr., 5(2), 102–113.
Clarke, J. L. (2000). “The use of fibre composites in concrete bridges—A state of the art review.” Concrete Bridge Development Group, The Concrete Society, Crowthorne, Berkshire.
Federation internationale du béton (fib). (2001). “Externally bonded FRP reinforcement for RC structures.” fib Bulletin 14, No. T.G. 9.3, Lausanne, Switzerland.
Haritos, N., and Hira, A. (2004). “Repair and strengthening of RC flat slab bridges using CFRPs.” Steel Compos. Struct., 66, 555–562.
Main Roads Western Australia (MRWA). (2006). “Load rating existing bridges. Bridge branch design information manual.” Doc 3912/02/04 Issue 25/01/06, Perth, WA, Australia.
Pellegrino, C., and Modena, C. (2002). “Fiber-reinforced Polymer shear strengthening of reinforced concrete beams with transverse steel reinforcement.” J. Compos. Constr., 6(2), 104–111.
Pham, H., and Al-Mahaidi, R. (2004). “Assessment of available prediction models for the strength of FRP retrofitted RC beams.” Compos. Struct., 66, 601–610.
Saadatmanesh, H., and Malek, A. M. (1998). “Design guidelines for flexural strengthening of RC beams with FRP plates.” J. Compos. Constr., 2(4), 158–164.
Shahrooz, B. M., and Boy, S. (2004). “Retrofit of a three-span slab bridge with fiber reinforced polymer systems—Testing and rating.” J. Compos. Constr., 8(3), 241–247.
Stallings, J. M., Tedesco, J. W., El-Mihilmy, M., and McCauley, M. (2000). “Field performance of FRP bridge repairs.” J. Bridge Eng., 5(2), 107–113.
Standards Australia International Ltd. (1991). “Methods of testing concrete—Method 14: Method for securing testing cores from hardened concrete for compressive strength.” Australian Standard AS 1012.14-1991, Sydney, NSW, Australia.
Standards Australia International Ltd. (1998). “Methods of testing concrete—Method 12: Determination of mass per unit volume of hardened concrete.” Australian Standard AS 1012.12-1998, Sydney, NSW, Australia.
Standards Australia International Ltd. (2004a). “Bridge design—Part 2: Design Loads.” Australian Standard AS 5100.2-2004, Sydney, NSW, Australia.
Standards Australia International Ltd. (2004b). “Bridge design—Part 5: Concrete.” Australian Standard AS 5100.5-2004, Sydney, NSW, Australia.
Standards Australia International Ltd. (2004c). “Bridge design—Part 7: Rating of existing bridges.” Australian Standard AS 5100.7-2004, Sydney, NSW, Australia.
Triantafillou, T. C., and Antonopoulos, P. C. (2000). “Design of concrete flexural members strengthened in shear with FRP.” J. Compos. Constr., 4(4), 198–205.
Zanardo, G., and Hao, H. (2004a). “Monitoring of MRWA Bridge N. 3014: Modal analysis results after upgrading.” UWA SDG Technical Rep. No. ST-04–04, Structural Discipline Group, Univ. of Western Australia, Perth, WA, Australia.
Zanardo, G., and Hao, H. (2004b). “Monitoring of MRWA Bridge 3014: Preliminary works.” UWA SDG Technical Rep. No ST-04–01, Structural Discipline Group, Univ. of Western Australia, Perth, WA, Australia.
Zanardo, G., Hao, H., and Deeks, A. J. (2004a). “Dynamic-based assessment of MRWA Bridge N.3014.” Proc., 18th Australasian Conf. on the Mechanics of Structures and Materials, Vol. II, Perth, WA, Australia, 1231–1237.
Zanardo, G., Hao, H., Yong, X., and Deeks, A. J. (2005). “Stiffness assessment through modal analysis of a RC slab bridge before and after strengthening.” J. Bridge Eng., 11(5), 590–601.
Zanardo, G., Pellegrino, C., Bobisut, C., and Modena, C. (2004b). “Performance evaluation of short span Reinforced concrete arch bridges.” J. Bridge Eng., 9(5), 424–434.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 4 • August 2007
Pages: 363 - 374
Copyright
© 2007 ASCE.
History
Received: Mar 17, 2005
Accepted: Jun 22, 2006
Published online: Aug 1, 2007
Published in print: Aug 2007
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.