Analysis of local effects of mechanical solicitations on
stay cables :
BENDING of an HELICAL WIRE
in CONTACT with a CORE WIRE
(1993)Abstract
The definition of fatigue loading programmes for cables used in the field of c1vil
engineering requires a deep understanding of their mechanical behaviour.
ln order to specify, in fatigue testing programs, the mechanical conditions of
solicitations inducing a considered state of damage, one needs to describe, at
the wire Ievel, local effects of simple or compound general solicitations .
This approach should permit a better understanding of local mechanical effects
of loading solicitations on stayed cables used in cable stayed bridges, as f or
example in the free bending problern at the anchorages Ievei.
Even seven wire strands, the simplest structure in cables, which are commonly
used for stayed cables show a complex mechanical behaviour.
A wire-core interaction model describing the interwire contact as a tangentially
loaded Hertzian contact problern is presented.
The theoretical predictions are confronted with previous experimental results,
thus enabling the analysis of the effects of the solicitations on a staying cable.
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