The Structural Engineer > Archive > Volume 69 (1991) > Issues > Issue 1 > Correspondence on Three-Hinge Analysis of Masonry Arches by F.W. Smith, Dr. W.J. Harvey and Professo
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Correspondence on Three-Hinge Analysis of Masonry Arches by F.W. Smith, Dr. W.J. Harvey and Professor A.E. Vardy

Dr. M. J. Blackler (Mott MacDonald)/Mr R. J. Bridle (Consultant) The authors have presented in their paper on the behaviour of masonry arch bridges a three-hinged method of analysis which is extended to allow failures by local crushing of the masonry to be simulated. In response to this paper, we would like to draw attention to the fact that failure calculations based on local crushing of the masonry can be very sensitive to the chosen value of allowable compressive strength.