Transmission line torsional stiffness. Confrontation of field-tests line and finite element simulations

Exceptional full-scale field-tests on a quad bundle line were led by KANSAI EPCO. These tests, which were performed in 1995, measured the torsional stiffness on a long dead-end span ( Z 640m). This paper gives a description of the tests and their results as well as a confrontation with finite element simulations. A comparison is also performed with other existing simplified methods. Basic parameters of bundle torsional stifhess are clearly pointed out.