Page 42 - Numerical Analysis and Modelling in Geomechanics

SURFACE DISPLACEMENTS OF AN AIRFIELD RUNWAY 23
material sets 12 and 13, the results indicate that there is an optimum depth of
detonation to cause maximum surface deflections.
If the repair team can see no evidence of a camouflet, but believe one is
present, they can overrun the runway to determine if the settlement
characteristics of the runway have been altered. If this is found to be the case
then the fatigue characteristics of the camouflet need to be determined. The
authors are pursuing research into the fatigue characteristics of the subgrade and
of the cement concrete runway for the 17 material sets.

References

1 Bull, J.W. and Woodford, C.H., 1992, Surface repair roughness prediction for
concrete hard standing following arbitrary explosive cratering, 4th International
Symposium on Numerical Models in Geomechanics (NUMOG IV), Pande, G.N.,
Pietruszczak, S. (Editors), Balkema Publishers, Rotterdam, pp. 871–878.
2 Bull, J.W. and Woodford, C.H., 1993, Damage assessment and repair of
explosively formed craters in airfield runways using empirical and numerical
modelling, Journal of Structural Engineering, Vol 20, No 1, pp. 1–7.
3 Bull, J.W. and Woodford, C.H., 1995, The numerical analysis and modelling of
repaired runways following chemical explosive crater formation, Chapter 6 in
“Numerical analysis and modelling of composite materials,” Bull, J.W. (Editor),
Blackie Academic & Professional, Glasgow, Scotland, pp. 128–151.
4 Bull, J.W. and Clarke, J.D., 1991, Rapid runway and highway repair using precast
concrete raft units, Proc Int Conf on Rapidly Assembled Structures, Bulson, P.S.
(Editor), Computational Mechanics Publications, Southampton, UK, pp. 139–149.
5 Bull, J.W., 1986, An analytical solution to the design of precast concrete
pavements, Int Jour Numerical & Analytical Methods in Geomechanics, Vol 10,
pp. 115–123.
6 Bull, J.W., 1991, Precast concrete raft units, Blackie and Sons, Glasgow, UK.
7 Bull, J.W., 1994, The interaction between precast concrete raft unit pavements and
their soil support, Chapter 12 in “Soil-structure interaction, numerical analysis and
modelling,” Bull, J.W. (Editor), Chapman and Hall, London, pp. 423–458.
8 Bull, J.W. and Woodford, C.H., 1999, The numerical modeling of crater repairs in
airfield runways, Computers and Structures, Vol 73, pp. 341–353.
9 Bull, J.W. and Woodford, C.H., 1999, The effect of camouflets on subgrade surface
support, Computers and Structures, Vol 73, pp. 315–325.
10 Bull, J.W. and Woodford, C.H., 1996, The numerical modelling of camouflets to
determine their effect on overlaying runways, 3rd Int Conf in Computational
Structures Technology, Advances in Finite Element Technology, Budapest,
Topping, B.H.V. (Editor) Civil Comp-Press, Edinburgh, pp. 349–356.
11 Bull, J.W. and Woodford, C.H., 1998, The prevention of runway collapse following
an underground explosion, Engineering Failure Analysis, Vol 5, No 4,
pp. 279–288.
12 Bull, J.W. and Woodford, C.H., 2000, Stress and displacement effects due to
subsurface barriers laid under cement concrete runways, Computers and Structures,
Vol 78, pp. 375–383.