A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Blast Retrofit Strategies For Masonry Walls: Exploratory Experimental Study
Certainly the events of September 2001 have heightened awareness regarding the potential devastating damage to civil infrastructure due to impact loading. Perhaps the most vulnerable are old, brittle masonry structures, which may not be capable of remaining stable during large blast (impact) loading, particularly in the out-of-plane direction. Although design guidelines are in place for developing load-resistance functions under these extreme-loading conditions, use of modern materials and novel installation solutions can assist in expanding our database of available, practical solutions. To this end, an exploratory experimental program was conducted to investigate the feasibility of retrofitting masonry walls with different Polyurethane and Polyurethane -fiber combinations. A series of masonry wall segments, each coated with a different Polyurethane or Polyurethane-fiber combination, were subjected to simultaneous axial compression and monotonic out-of-plane loading. Two different types of Polyurethane coating, of thickness ranging from 6.4 to 22.2 mm, and two different types of carbon fiber fabric layers were considered. This paper will describe the testing program, summarize the experimental load-displacement resistance functions obtained, and describe the damage characteristics observed for the masonry wall segments. Test results indicate that the addition of even a single thin layer of Polyurethane can greatly enhance the out-of-plane performance and stability of the wall system. However, in select cases, undesirable brittle failures were observed as well as debonding at masonry joints and delamination between the masonry and Polyurethane coating.
Blast Retrofit Strategies For Masonry Walls: Exploratory Experimental Study
Certainly the events of September 2001 have heightened awareness regarding the potential devastating damage to civil infrastructure due to impact loading. Perhaps the most vulnerable are old, brittle masonry structures, which may not be capable of remaining stable during large blast (impact) loading, particularly in the out-of-plane direction. Although design guidelines are in place for developing load-resistance functions under these extreme-loading conditions, use of modern materials and novel installation solutions can assist in expanding our database of available, practical solutions. To this end, an exploratory experimental program was conducted to investigate the feasibility of retrofitting masonry walls with different Polyurethane and Polyurethane -fiber combinations. A series of masonry wall segments, each coated with a different Polyurethane or Polyurethane-fiber combination, were subjected to simultaneous axial compression and monotonic out-of-plane loading. Two different types of Polyurethane coating, of thickness ranging from 6.4 to 22.2 mm, and two different types of carbon fiber fabric layers were considered. This paper will describe the testing program, summarize the experimental load-displacement resistance functions obtained, and describe the damage characteristics observed for the masonry wall segments. Test results indicate that the addition of even a single thin layer of Polyurethane can greatly enhance the out-of-plane performance and stability of the wall system. However, in select cases, undesirable brittle failures were observed as well as debonding at masonry joints and delamination between the masonry and Polyurethane coating.
Blast Retrofit Strategies For Masonry Walls: Exploratory Experimental Study
Hutchinson, T. C. (author) / Nicolaisen, K. N. (author) / Morrill, K. B. (author)
Structures Congress 2004 ; 2004 ; Nashville, Tennessee, United States
Structures 2004 ; 1-8
2004-05-21
Conference paper
Electronic Resource
English
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