Dynamic Testing of Reinforced Concrete Beams Damaged and Repaired with Fiber Reinforced Polymer Sheets
Publication: Journal of Materials in Civil Engineering
Volume 16, Issue 5
Abstract
A procedure for assessing stiffness variations due to damaging and retrofitting of reinforced concrete beams is presented in this paper. This procedure is based on modal analysis and testing. Two beams were subjected to cyclic loading at increasing load levels, in order to induce in them increasing cracking patterns. The beams were then retrofitted by externally bonded carbon fiber reinforced polymer sheets. Modal tests were carried out after each loading–unloading cycle. A theoretical model was developed, in order to simulate the behavior of the beams in each situation. This model is based on the concepts of fracture mechanics to evaluate the stiffness of cracked beam elements, with and without external strengthening. The theoretical results are in good agreement with the experimental ones. The research suggests that dynamic testing can be used to obtain useful information about the effectiveness of the strengthening system.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Arduini, M., Bonfiglioli, B., Manfroni, O., and Pascale, G. ( 1999). “New applications of fiber optic sensors for structural monitoring.” Proc., Symp. on Structures for the Future—The Search for Quality, IABSE Symp., Rio de Janeiro, Brazil, 491–498.
2.
Arduini, M., and Nanni, A. (1997). “Behavior of precracked RC beams strengthened with carbon FRP sheets.” J. Compos. Constr., 1(2), 63–70.
3.
Eilbracht, G., and Link, M. ( 1995). “Identification of crack parameters in concrete beams using modal test data.” Proc., Int. Symp. on Nondestructive Testing in Civil Engineering, G. Schickert and H. Wiggenhauser, eds., Berlin, 327–334.
4.
International Federation for Structural Concrete (FIB (2001). “Bulletin 14: Externally bonded FRP reinforcement for RC structures.” Technical Rep. on the “Design and use of externally bonded fibre reinforced polymer reinforcement (FRP EBR) for reinforced concrete structures” by ‘EBR’ working party of FIB TG 9.3, FIB, Lausanne, Switzerland.
5.
Massabò, R., and Carpinteri, A. (1997). “Continuous versus discontinuous bridged-crack model for fiber-reinforced materials in flexure.” Int. J. Solids Struct., 34(18), 2321–2338.
6.
Okamura, H. (1975). “Deformation and strength of cracked member under bending moment and axial force.” Eng. Fract. Mech., 7, 531–539.
7.
Pascale, G., and Bonfiglioli, B. ( 2001). “Reinforced concrete beams damaged and repaired with GFRP: dynamic testing and modelling.” Proc., Int. Conf. on FRP Composites in Civil Engineering, J.-G. Teng, ed., Elsevier, Hong Kong, 441–448.
8.
Pascale, G., Bonfiglioli, B., and Bastianini, F. ( 2000). “Metodologie di indagine per la valutazione della qualità dei rinforzi in FRP applicati a strutture in calcestruzzo e altri materiali.” Proc., 29th Convegno Nazionale dell’Associazione Italiana per l’Analisi delle Sollecitazioni, G. Merli, P. Citti, M. Pierini, and D. Giannelli, eds., Lucca, Italy, 739–748 (in Italian).
9.
Pimentel, R., Pavic, A., and Waldron, P. ( 1999). “Vibration performance of footbridges established via modal testing.” Proc., IABSE Symp. “Structures for the Future—The Search for Quality,” Rio de Janeiro, Brazil, 602–609.
10.
Sih, G.C. ( 1973). Handbook of stress-intensity factors for researchers and engineers, Lehigh University Press, Bethlehem, Pa.
11.
Viola, E., and Federici, L. ( 1998). “Modellazione del comportamento dinamico di un telaio con travi fessurate.” Proc., 27th Convegno Nazionale AIAS, Perugia, Italy, 1155–1164 (in Italian).
12.
Zonta, D. ( 2000). “Structural damage detection and localization by using vibrational measurements.” PhD dissertation, Univ. of Bologna, Bologna, Italy.
Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 16 • Issue 5 • October 2004
Pages: 400 - 406
Copyright
Copyright © 2004 ASCE.
History
Received: May 29, 2002
Accepted: Apr 24, 2003
Published online: Oct 1, 2004
Published in print: Oct 2004
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.