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Local impact effects on concrete target due to missile: An empirical and numerical approach

DSpace at IIT Bombay

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Title Local impact effects on concrete target due to missile: An empirical and numerical approach
 
Creator RANJAN, R
BANERJEE, S
SINGH, RK
BANERJI, P
 
Subject Local impact effect
Reinforced concrete target
Empirical
Analytical
Numerical simulation
REINFORCED-CONCRETE
 
Description Concrete containment walls and internal concrete barrier walls of a Nuclear Power Plant safety related structures are often required to be designed for externally and internally generated missiles. Potential missiles include external extreme wind generated missiles, aircraft crash and internal accident generated missiles such as impact due to turbine blade failure and steel pipe missiles resulting from pipe break. The objective of the present paper is to compare local missile impact effects on reinforced concrete target using available empirical formulations with those obtained using LS-DYNA numerical simulation. The use of numerical simulations for capturing the transient structural response has become increasingly used for structural design against impact loads. They overcome the limits of applicability of the empirical formulae and also provide information on stress and deformation fields, which may be used to improve the resistance of the concrete. Finite element (FE) analyses of an experimental impact problem reported by Kojima (1991) are carried out that are able to capture the missile impact effects; in terms of local and global damage. The continuous surface cap model has been used for modelling concrete behaviour. A range of missile velocity has been considered to simulate local missile impact phenomenon and modes of failure and to capture the concrete response from elastic to plastic fracture. A comparison is then made between the empirical formulations, numerical simulation results, and available experimental results of slab impact tests. While the numerical simulation is able to capture the experimental trend and results, a comparison of penetration depth and scabbing and perforation limits as per different empirical formulation shows substantial divergence. (C) 2014 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2014-12-29T05:02:58Z
2014-12-29T05:02:58Z
2014
 
Type Article
 
Identifier ANNALS OF NUCLEAR ENERGY, 68262-275
0306-4549
http://dx.doi.org/10.1016/j.anucene.2014.01.015
http://dspace.library.iitb.ac.in/jspui/handle/100/17144
 
Language English