Accession Number : ADP001771

Title :   Concrete Bridges Subjected to Impulsive Loading from Fuel-Air Explosives,

Corporate Author : SHEFFIELD UNIV (ENGLAND) DEPT OF CIVIL AND STRUCTURAL ENGINEERING

Personal Author(s) : Hobbs,Brian

Report Date : MAY 1983

Pagination or Media Count : 6

Abstract : This paper is concerned with an analytical study of the effect of distributed impulsive loading on a range of concrete bridge types. The principal area of interest is collapse behaviour and the establishment of criteria for effective demolition by means of fuel-air explosives. The basis of a simplified analytical approach developed for this work is outlined. Analytical results relating the expected permanent midspan deflection to the total impulse delivered by the explosion are presented. Criteria for effective demolition are discussed and the calculated critical impulse loadings required to cause bridge collapse are shown to range from 18 kNsec/m square to 46 kNsec.m square. These results are compared with those of a previous investigation concerned only with steel bridges.

Descriptors :   *Weapons effects, Explosion effects, Fuel air explosives, Concrete, Bridges, Structural response, Impulse loading, Collapse, Demolition, Steel, Reinforcing materials, Computations, Comparison, Mechanical properties, Strain rate, Sensitivity, Flexural properties, Mathematical prediction, Factor analysis, Conferencing(Communications), Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE