Strain and stress detection method of strain and stress detectors and structures using the same

摘要

PURPOSE: To make it possible to detect distortion and stress with a simple and inexpensive structure by measuring electric resistance values at both end parts of a conductive fiber bundle as an assembly of conducting continuous fibers. ;CONSTITUTION: A carbon fiber bundle 3 comprising a number of continuous carbon fibers (conducting continuous fibers) 2 is covered by a resin material 5 and a terminal 4 is provided at both end parts thereof for measuring electric resistance values to form a distortion/stress detector 1B. The detector 1B is attached at specified points of a construction 7 such as slab of a bridge, a building or the like and a measuring device is connected to the terminal 4 through a wire 10_a to measure an electric resistance value of the fiber bundle 3. At this point, since the detector 1B indicates a change in the resistance value associated with a distortion of the construction 7, distortion of the construction 7 can be grasped and the degree of a stress can be known.;COPYRIGHT: (C)1995,JPO