Static Analysis Of The Turris Lybisonis Roman
Multispan Stone Arch Bridge
Author(s)
I. Mura, Z. Odoni & M. Perra
Abstract
It is not easy to determine whether a stone bridge is in danger of collapsing. At
present, there is no accepted procedure for determining the load-carrying
capacity of a masonry arch bridge. In this paper the multispan stone arch bridge
in Portotorres (Sardinia, Italy) named Turris Lybisonis is examined. The bridge,
built in the 1st century A.D., was still in service into the 20th century. Using the
upper-bound theory of plasticity in conjunction with geometrical compatibility
criteria to obtain the solutions, three types of failure are considered: "hinging", in
which a space opens between two stones in the arch, "sliding", in which a stone
slips out of place, and a combination of hinging and sliding. The numerical
results obtained by application of the recent "Ring" soft
Keywords
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