A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Blast Resistant Design and Retrofit of Reinforced Concrete Columns and Walls
Reinforced concrete columns and walls in existing buildings can be economically retrofitted to resist blast effects. The blast retrofit of reinforced concrete columns using steel jackets or FRP composites wraps was started after the Oklahoma City bombing. It was shown that, in such events, columns on the first floor can be sheared off and lead to progressive building collapse, but that these columns can be upgraded to resist the blast loads and building collapse can be prevented. Similarly, it was shown that walls can be retrofitted to withstand high loads and protect building occupants. As part of a multiyear anti-terrorist program, under the auspices of the Technical Support Working Group (TSWG) and the Defense Threat Reduction Agency (DTRA), full-scale test series were recently completed to quantify the effects of terrorist explosions on conventional buildings and structural components, and to demonstrate these retrofit methodologies. A retrofit design procedure developed by Karagozian & Case (K&C) using steel jackets and FRP wraps was shown to successfully prevent column damage and building collapse, for circular, square, and rectangular columns. This simple column blast analysis and retrofit design (CBARD) procedure was based on first-principle calculations and has been verified and validated against many full-scale blast tests as well as quasi-static laboratory tests. Similarly, a wall retrofit design procedure was completed. Both procedures were coded to run in a Windows environment. Designs of columns and walls can be completed in minutes by experienced program users.
Blast Resistant Design and Retrofit of Reinforced Concrete Columns and Walls
Reinforced concrete columns and walls in existing buildings can be economically retrofitted to resist blast effects. The blast retrofit of reinforced concrete columns using steel jackets or FRP composites wraps was started after the Oklahoma City bombing. It was shown that, in such events, columns on the first floor can be sheared off and lead to progressive building collapse, but that these columns can be upgraded to resist the blast loads and building collapse can be prevented. Similarly, it was shown that walls can be retrofitted to withstand high loads and protect building occupants. As part of a multiyear anti-terrorist program, under the auspices of the Technical Support Working Group (TSWG) and the Defense Threat Reduction Agency (DTRA), full-scale test series were recently completed to quantify the effects of terrorist explosions on conventional buildings and structural components, and to demonstrate these retrofit methodologies. A retrofit design procedure developed by Karagozian & Case (K&C) using steel jackets and FRP wraps was shown to successfully prevent column damage and building collapse, for circular, square, and rectangular columns. This simple column blast analysis and retrofit design (CBARD) procedure was based on first-principle calculations and has been verified and validated against many full-scale blast tests as well as quasi-static laboratory tests. Similarly, a wall retrofit design procedure was completed. Both procedures were coded to run in a Windows environment. Designs of columns and walls can be completed in minutes by experienced program users.
Blast Resistant Design and Retrofit of Reinforced Concrete Columns and Walls
Morrill, K. B. (author) / Malvar, L. J. (author) / Crawford, J. E. (author) / Ferritto, J. M. (author)
Structures Congress 2004 ; 2004 ; Nashville, Tennessee, United States
Structures 2004 ; 1-8
2004-05-21
Conference paper
Electronic Resource
English
| British Library Online Contents | 2019
Seismic Retrofit of Short Reinforced Concrete Columns
| British Library Conference Proceedings | 2003