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 (/spl cong/640 m). 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 stiffness are clearly pointed out.
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