APPARATUS FOR ESTIMATING PRESTRESS OF MULTI-STRAND USING ELECTRO-MAGNETIC SENSOR

摘要

The present invention relates to a tensile force measurement device for a multi-strand capable of measuring the tensile force of each tendon using electromagnetic (EM) sensors in a multi-strand having a plurality of tendons used to introduce tensile force to a concrete structure or a plurality of cables used in a cable bridge supported by the cables like a suspension bridge. According to the present invention, the tensile force measurement device (1) to measure the tensile force of tendons (301) when each tendon (301) of a multi-strand is tensed by a tension device (400) having a forward pressing plate (410) comprises: an EM sensor assembly (10) having a plurality of tube-type EM sensors (11) to measure the tensile force of the tendons (301) arranged therethrough; and a housing (2) formed with a cylindrical member of which both longitudinal ends are opened, in which the EM sensor assembly (10) is arranged to be longitudinally movable, and assembled to the front end of the tension device (400) when the tensile force of the tendons is measured.