RESEARCH ON CARBON FIBER REINFORCED POLYMER STAY-CABLE AND ITS MECHANICAL PROPERTY

Abstract

Abstract: This paper studied a new kind of CFRP stay-cable and its mechanical property. A new structure of CFRP stay-cable was proposed and manufactured. Instead of parallel arrangement of the CFRP tendons, CFRP tendons in new structure of CFRP stay-cable is twisted together in cable and diverge in the anchor end. The tensile strength and tension-tension fatigue behaviour of the new structure of CFRP stay-cable were tested. Experimental results show that the new structure of stay-cable and its manufacturing process are feasible. The twist angle of 2.5°~3.5° and the divergence angle of 2.5° are suitable for CFRP tendons, and the slight twist and bending of tendons will not lead to premature failure. The static load tensile anchorage efficiency of the new CFRP stay-cable is more than 95%. After 2.5 million fatigue loading tests, the anchorage part is not damaged and the broken tendon rate of the cable is less than 5%. With the increase of fatigue loading cycles, the elastic modulus of the CFRP cables basically remains unchanged. The cable extension at the anchorage end and the retractions of the tendons and anchor plates at the back end of the anchorage are less than 1 mm.

Key words: carbon fiber reinforced polymer stay-cable, cable structure, adhesive anchorage system, static load property, fatigue characteristics

CLC Number:

TB332

ZHU Yuan-lin, LIU Li-hua, ZHOU Jia-qi, HUANG Sheng-bin. RESEARCH ON CARBON FIBER REINFORCED POLYMER STAY-CABLE AND ITS MECHANICAL PROPERTY[J]. Fiber Reinforced Plastics/Composites, 2019, 0(6): 80-84.

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