RING 1.5 : Known Bugs

Build 150. Release date 5th May 2005

The following is a list of known bugs that can affect the computed load carrying capacity when using RING 1.5:


The depth of crushing is not permitted to be greater than one half of the ring thickness, potentially leading to non-conservative results being obtained in the case of bridges comprising comparatively weak masonry.

Frequent failure to find a converged solution when the bridge includes multiple arch rings and low strength masonry.

When inclined surface profiles are present a bug means that loads can be incorrectly distributed, leading to small inaccuracies in the computed load carrying capacity.

The self-weight of 'skew-back' blocks on piers and abutments is calculated incorrectly when multi-ring arch barrels are present.

The Boussinesq distribution model will in some cases erroneously distribute load onto parts of the masonry arch barrel which have no 'direct line of sight' to the load.

Load distribution is incorrect when load is applied to an arch barrel which does not spring from same elevation as the left hand springing of span 1 (when default truncated Boussinesq distribution model used).

For information on the current version of LimitState:RING
visit www.limitstate.com/ring

Copyright © 2005, CLADU, The University of Sheffield.





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