GFRP Rod and Rope for Structural Guy Applications

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Abstract
Stress-rupture tests at moderately elevated temperatures under low and saturated humidity conditions were carried out on two GFRP rod and rope materials and the stress-rupture characteristics of the materials are examined. Flexural tests were performed on three GFRP rod and rope materials from +77 to -80°F (+43 to -62°C) and the flexural moduli of the materials are evaluated. Simulated aeolian vibration tests were carried out on two GFRP rod and rope materials held under constant tensile loads using four types of commercial guy-termination grips and an NBS shear-type grip. The resistance to damage of these materials from aeolian vibration is observed up to 10 cycles. A series of 30-day storage tests was conducted on four GFRP rod and rope materials at temperatures ranging from 125 to 200°F (46 to 93°C). Several guide lines regarding minimum coil diameters and maximum exposure temperatures for long-term storage are established. Some residual strength tests were performed on the materials which had been exposed to long-term storage.

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