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MODELING OF BLAST LOADING ON ABOVEGROUND STRUCTURES .2. INTERNAL BLAST AND GROUND SHOCK
Faculty
Engineering
Year:
1994
Type of Publication:
Article
Pages:
597-606
Authors:
BESHARA, FBA
DOI:
10.1016/0045-7949(94)90067-1
Journal:
COMPUTERS \& STRUCTURES PERGAMON-ELSEVIER SCIENCE LTD
Volume:
51
Research Area:
Computer Science; Engineering
ISSN
ISI:A1994NW02100014
Keywords :
MODELING , BLAST LOADING , ABOVEGROUND STRUCTURES , INTERNAL
Abstract:
Recent studies of the nature and structural effects of confined explosions, contact blast and explosion-induced ground shock are presented. High explosive blast is distinguished from that due to a gaseous deflagration. The effects of confinement and venting are considered in the evaluation of dynamic loads. Maxima for the initial internal blast pressure can be estimated from the scaled blast data or theoretical analyses of normal blast wave reflection from a rigid wall. Semi-empirical relations and prediction methods for gas pressures for many types of internal explosions including high explosives, gas mixtures and dust suspensions are given on the basis of pseudo-static character. The loading of a contact explosion and the associated effects on a concrete target are determined as functions of charge weight, concrete strength and member thickness. In the final part, the evaluation of both airblast-induced ground shock and directly transmitted motion are included in simple form without considering the soil-structure interaction.
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