Hybrid Composite Cable with an Increased Specific Strength for Tensioned Structures

High-strength hybrid composite cables with large specific strength based on such materials as carbon fiber reinforced plastics (CFRP), glass fiber reinforced plastics (GFRP), and Vectran are widely used in constructional practice. But use of a steel component enables to increase small relative elongation, decrease brittleness, and expand area of application of high-strength hybrid composite cables. In this paper, steel was investigated in combination with such materials as CFRP, GFRP, and Vectran. The behavior of hybrid composite cable was studied analytically and by experiment. Hybrid composite cables with increased specific strength were considered as materials of several cable groups for a prestressed saddle-shaped cable roof with dimensions 50×50 m. The opportunity to decrease displacements of composite saddle-shaped cable roof by using cable trusses, made from the hybrid composite cable with the increased specific strength was studied Rational geometric characteristics of the cable truss were determined by numerical experiment. It was shown that using hybrid composite cable enables to increase its specific strength up to 2.4 times. Rational components for composite cable with an increased specific strength were chosen by the numerical experiment.