Strengthening of Unreinforced Masonry Walls Using FRPs
Publication: Journal of Composites for Construction
Volume 5, Issue 2
Abstract
An experimental program conducted at the University of Alberta showed that externally applied fiber reinforced polymers (FRPs) are effective in increasing the load-carrying capacity of unreinforced masonry walls that are subjected to out-of-plane flexural loads. Ten walls with a height of 4 m were used to conduct 13 tests in two series. Both undamaged and slightly damaged walls were tested. The following experimental parameters were investigated: (1) type of fiber reinforcement; (2) amount of fiber reinforcement; (3) layout of fiber reinforcement; (4) effects of moderate compressive axial load; and (5) cyclic behavior. This paper briefly reviews the existing rehabilitation methods available and explains why the use of FRPs as external reinforcement is a possible alternative. The test setup and instrumentation of the specimens are described followed by a discussion of the results. The general behavior of the specimens is discussed with emphasis on the load deflection and strain characteristics. The modes of failure are identified and categorized. Finally, a simple analytical model is proposed and compared with the test results followed by a summary of the major results.
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References
1.
Albert, M. L., Cheng, J. J. R., and Elwi, A. E. ( 1998). “Rehabilitation of unreinforced masonry walls with externally applied fiber-reinforced polymers.” Struct. Engrg. Rep. No. 226, Dept. of Civ. and Envir. Engrg., University of Alberta, Edmonton, Alta., Canada.
2.
ASTM. ( 1995). “Standard test methods for tensile properties of polymer matrix composite materials.” D 3039M, West Conshohocken, Pa.
3.
Canadian Standards Association (CSA). ( 1994). “Masonry design for buildings (limit states design).” S304.1, Rexdale, Ont., Canada.
4.
Ehsani, M. R. ( 1995). “Seismic retrofitting of concrete and masonry structures with composite materials: Research and field applications.” Proc., 3rd Nat. Concrete and Masonry Engrg. Conf., Skokie, Ill., 19–31.
5.
Hamid, A. A., Mahmoud, A. D. S., and El Magd, S. A. ( 1994). “Strengthening and repair of unreinforced masonry structures: State-of-the-art.” Proc., 10th Int. Brick and Block Masonry Conf., Elsevier Applied Science, London, Vol. 2, 485–497.
6.
Kingsley, G. R. ( 1995). “Evaluation and retrofit of unreinforced masonry buildings.” Proc., 3rd Nat. Concrete and Masonry Engrg. Conf., Skokie, Ill., 709–727.
7.
Modena, C. ( 1994). “Repair and upgrading techniques of unreinforced masonry structures utilized after the Friuli and Campania/Basilicata earthquakes.” Earthquake Spectra, Earthquake Engrg. Res. Inst., Berkeley, Calif., 10(1), 171–185.
8.
Schwegler, G. ( 1994). “Masonry construction strengthened with fiber composites in seismically endangered zones.” Proc., 10th Eur. Conf. on Earthquake Engrg.
9.
Tsai, S., and Hahn, H. ( 1980). Introduction to composite materials, Technomic Publishing Co., Lancaster, Pa.
10.
Weeks, J., Sieble, F., Hegemier, G., and Priestley, M. J. N. ( 1994). “The US-TCCMAR full-scale five-story masonry research building test: Part V—Repair and retest.” Rep. SSRP-94/05, Struct. Sys. Res. Proj., University of California, San Diego.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 5 • Issue 2 • May 2001
Pages: 76 - 84
History
Received: Jul 15, 1999
Published online: May 1, 2001
Published in print: May 2001
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