1. Ratings

\(A\)	area of the straight section of the cable.
\(E\)	Young’s module.
\(F\)	vector of the internal forces of the element.
\({F}_{n}\)	internal force at the \(n\) node.
\(H\)	horizontal component of tension [§An1].
\({I}_{3}\)	3rd order unit matrix.
\(K\)	element stiffness matrix.
\(l\)	current length of the element.
\({l}_{0}\)	length at rest.
\({l}_{i}\)	initial length.
\({l}_{1}\)	\(\overrightarrow{{N}_{3}{N}_{1}}\)
\({l}_{1}\)	Euclidean norm of \({l}_{1}\)
\({l}_{2}\)	\(\overrightarrow{{N}_{3}{N}_{2}}\)
\({l}_{2}\)	Euclidean norm of \({l}_{2}\).
\(N\)	current voltage of the cable constituting the element.
\({N}_{i}\)	initial voltage (pretension).
\(S\)	cable span arrow [§An1].
\(s\)	length of a span [§An1].
\(T\)	current temperature.
\({T}_{i}\)	initial temperature.
\(u\)	vector-displacement of the nodes in relation to the initial position.
\({u}_{n}\)	moving the \(n\) node from its initial position.
\(w\)	weight per unit length.
\({x}_{n}\)	vector-position of node \(n\) in initial configuration.
\(\alpha\)	thermal expansion coefficient.
\(\varepsilon\)	current deformation compared to the initial configuration.