Resistance of blast loaded prestressed masonry walls
conference paper
This paper presents a study on the resistance and residual capacity of blast loaded masonry walls with and without a vertical compressive kad. Moreover understanding is gained on the main mechanisms that contribute to the resistance and bearing capacity of the wall.
Blast experiments were performed on one-way masonry walls with and without prestress. A measurement technique was used to determine the resistance of the wall by measuring pressures, accelerations and displacements at multiple locations. The results show a considerable increase in blast resistance of the wall with prestress compared to a wall without prestress.
The experimentally obtained results were compared to two different single degree of freedom engineering methods. The first method uses the tensile bending strength of the wall and the second one describes a masonry wall with a rigid support. The comparison shows that the tensile strength method showed acceptable agreement for a wall without prestress. The rigid support method worked reasonable for the prestressed wall. The engineering compressive strength of the mortar was found to be the restricting factor for the resistance of the wall.
Finally the residual bearing capacity of the wall after blast loading was explored. Up to a substantial blast load level, no significant reduction in residual bearing capacity occurs.
Blast experiments were performed on one-way masonry walls with and without prestress. A measurement technique was used to determine the resistance of the wall by measuring pressures, accelerations and displacements at multiple locations. The results show a considerable increase in blast resistance of the wall with prestress compared to a wall without prestress.
The experimentally obtained results were compared to two different single degree of freedom engineering methods. The first method uses the tensile bending strength of the wall and the second one describes a masonry wall with a rigid support. The comparison shows that the tensile strength method showed acceptable agreement for a wall without prestress. The rigid support method worked reasonable for the prestressed wall. The engineering compressive strength of the mortar was found to be the restricting factor for the resistance of the wall.
Finally the residual bearing capacity of the wall after blast loading was explored. Up to a substantial blast load level, no significant reduction in residual bearing capacity occurs.
TNO Identifier
183336
Source title
International Symposium on Interaction of the Effects of Munitions with Structures (ISIEMS) 12. 1, Orlando, FL, USA, 18-21 September 2007
Pages
11 p.
Files
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