인장을 가하지 않은 강연선의 정착길이에 대한 실험적 연구

Abstract

The primary objective of this research is a study on the pullout An Experimental Study on Development Length of Untensioned Strand in concrete. Half precast concrete were used as specimens. And at the connection between the PC and RC separation was assumed to cause behavior. Major test variables are embedment length(50% ~ 120%), concrete cover(10mm, 20mm), Strand bundle and diameter of strands(12.7mm, 15.2mm) as a results, The untensioned strands(12.7mm) displaysed bond performance when secure development length more than 70% accordiong to the development of deformed bars equation.