Blast Resistance of FRP-Strengthened Masonry Walls. I: Approximate Analysis and Field Explosion Tests
Publication: Journal of Composites for Construction
Volume 13, Issue 5
Abstract
An approximate analysis method is proposed to determine the blast resistance of fiber-reinforced polymer (FRP)-strengthened masonry walls. The method relates the static to dynamic response by incorporating the strain rate effect on the material strength and a dynamic load factor for the applied peak load. Based on the method, 18 full-scale masonry walls reinforced with three different FRP systems were designed and subjected to field explosions, using charges of 27-ton TNT in one test and 5-ton TNT in the other. For each test, the walls were placed at three different standoff distances and orientations to the blast source. The response of the strengthened walls under blast was monitored by high-speed data acquisition systems. Post-test observations indicated no visible damage, crack, or debonding in any of the walls, thus confirming the effectiveness of the FRP retrofit technique in blast protection. The data presented are valuable for validation of analytical or numerical models.
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References
American Concrete Institute (ACI). (2007). “State-of-the-art report on fiber reinforced polymer reinforcement for concrete structures.” ACI440R–07, Detroit.
Baylot, J. T., Bullock, B., Slawson, T. R., and Woodson, S. C. (2005). “Blast response of lightly attached concrete masonry unit walls.” J. Struct. Eng., 131(8), 1186–1193.
Biggs, J. M. (1964). Introduction to structural dynamics, McGraw-Hill, New York, 213–227.
Carney, P., and Myers, J. J. (2005). “Out-of-plane static and blast resistance of unreinforced masonry wall connections strengthened with FRP.” Proc., 7th Int. Symp. on Fiber-Reinforced Polymer Reinforcement for Concrete Structures, American Concrete Institute, Kansas City, Mo., 229–248.
Davidson, J. S., Fisher, J. W., Hammons, M. I., Porter, J. R., and Dinan, R. J. (2005). “Failure mechanisms of polymer reinforced concrete masonry walls subjected to blast.” J. Struct. Eng., 131(8), 1194–1205.
Davidson, J. S., Porter, J. R., Dinan, R. J., Hammons, M. I., and Connell, J. D. (2004). “Explosive testing of polymer retrofit masonry walls.” J. Perform. Constr. Facil., 18(2), 100–106.
Ehsani, M. R. (1995). “Strengthening of earthquake damaged masonry structures with composite materials.” Nonmetallic (FRP) reinforcement for concrete structures, L. Taerwe, ed., Spon, London, 681–687.
Gilstrap, J. M., and Dolan, C. W. (1998). “Out-of-plane bending of FRP reinforced masonry walls.” Compos. Sci. Technol., 58, 1277–1284.
Hendry, A. W. (1998). Structural masonry, 2nd Ed., Macmillan, New York, 16–50, 181–190.
Malvar, L. J., Crawford, J. E., and Morrill, K. B. (2007). “Use of composites to resist blast.” J. Compos. Constr., 11(6), 601–610.
Muszynski, L. C., and Purcell, M. R. (2003). “Use of composite reinforcement to strengthen concrete and air-entrained concrete masonry walls against air blast.” J. Compos. Constr., 7(2), 98–108.
Patoary, M. K. H., and Tan, K. H. (2003). “Blast resistance of prototype in-built masonry walls strengthened with FRP systems.” Proc., 6th Int. Symp. on Fiber-Reinforced Polymer Reinforcement for Concrete Structures, K. H. Tan, ed., World Scientific, Singapore, 1189–1198.
Saadatmanesh, H. (1994). “Fiber composites for new and existing structures.” ACI Struct. J., 91(3), 346–354.
Saadatmanesh, H. (1997). “Extending service life of concrete and masonry structures with fiber composites.” Constr. Build. Mater., 11(5–6), 327–335.
Tan, K. H., and Patoary, M. K. H. (2004). “Strengthening of masonry walls against out-of-plane loads using FRP reinforcement.” J. Compos. Constr., 8(1), 79–87.
Thanasis, C. T. (1998). “Strengthening of masonry structures using epoxy-bonded FRP laminates.” J. Compos. Constr., 2(2), 96–104.
U.S. Department of the Army. (1986). “Fundamentals of protective design for conventional weapons.” Technical manual TM5-855-1, Washington, D.C.
U.S. Department of the Army. (1990). “Structures to resist the effects of the accidental explosions.” Technical manual TM5-1300, Picatinny Arsenal, N.J.
Volkman, D. E. (1990). “Aspects of blast resistance masonry design.” Masonry: Components to assemblages ASTM STP 1063, J. H. Mattys, ed., ASTM, West Conshohocken, Pa., 413–422.
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© 2009 ASCE.
History
Received: Aug 7, 2007
Accepted: Nov 28, 2007
Published online: Sep 15, 2009
Published in print: Oct 2009
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