Accession Number : ADP004846

Title :   The Failure Mode of Layered Concrete Constructions due to Contact Charges,

Corporate Author : PRINS MAURITS LABORATORIUM TNO RIJSWIJK (NETHERLANDS)

Personal Author(s) : Weerheijm,J. ; Karthaus,W. ; Opschoor,G.

Report Date : AUG 1984

Pagination or Media Count : 16

Abstract : Conclusions from an experimental and theoretical research program is used with a intermediate layer and the thickness of the directly loaded outer slab is smaller than the critical thickness, then this slab fails in a critical way. This means that a concentrated loading is created by the stream of particles which are ejected through the hole punched in the directly loaded slab. This concentrated load has a high energy content and dominates the failure process in the other parts of the structure. (2) No geometrical damping occurs in the stream of particles. (3) When the concentrated loading is formed, this loading cannot be distributed economically by increasing the stiffness and strength of the second layer, and the lower slab fails as a result of shearing.

Descriptors :   *CONCRETE, *EXPLOSION EFFECTS, FAILURE(MECHANICS), LAYERS, THICKNESS, SANDWICH CONSTRUCTION, EXPLOSIVE CHARGES, LOADS(FORCES), FOCUSING, HIGH ENERGY, PARTICLES, DEFORMATION, SHEAR PROPERTIES, RESIDUAL STRESS, CRACKS, NETHERLANDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE