抄録
Experimental tests have been carried out on the mechanical behavior of CFRP 1×7 strand cables with a central core subjected to tensile and torsional loading conditions. As a consequence of helical structure, their tensile and torsional properties are strongly coupled. In addition to AE monitoring, the failure process of each helical string and a straight core has been probed independently by means of electrical resistance method. Unloading-reloading tests have also been done to investigate the effects of progressive cyclic loading. The electrical resistance method, which requires no external sensor, works successfully for the sensitive detection of the fiber breakage in the core and helical strings and hence, the present cable can be regarded as a smart structural element with self-diagnostic ability.
