Blast Response of Walls Retrofitted with Elastomer Coatings
Abstract
Recent tests at Tyndall Air Force Research Laboratory show that an elastomer-coated to the inside wall of a building can offer significant protection for occupants by keeping wall fragments together and shielding out blast debris. In this paper, we develop an equivalent single degree-of-freedom model that can be used to predict dynamic response of a polymer-retrofitted concrete brick wall subjected to a stand-off explosion. As an example, we consider the blast response of a l 0 ft-square, 8 in-thick concrete brick wall coated with a 0.083 in thick layer of polyurea. Explosive field tests with a uniformly-distributed pressure pulse of 40 psi peak value and 20 ms pulse duration indicate that the retrofitted wall reaches a maximum deflection of about 7 in. Our analytical model suggested that the blast response of this wall could be simulated assuming the concrete modulus was reduced to about 5% of its original value. The proposed single degree-of-freedom model, which is based on coupling of the bending/membrane resistance of the wall, compared very well with the ABAQUS results when the maximum deflections of the wall were between 1-2 times the wall thickness.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2004
- Accession Number
- ADA589006
Entities
People
- Michelle S. Hoo Fatt
- R. J. Dinan
- X. Ouyang
Organizations
- Air Combat Command