원전 고강도철근 적용을 위한 정착길이 산정식 비교분석

ACI 349-13(KEPIC-SNC), code requirements for nuclear safety-related structures, allows the use of ASTM A615 Gr. 60, Gr. 75, Gr. 80 rebars without changing standard hooks, minimum bend diameter and rebar spacing. However, since the development length increases proportional to the yield strength and reflects a safety factor of 1.2, such uses may adversely affect the reduction of rebar amount, which is the purpose of using high strength rebars. Therefore, this research studied the ACI 349-13 design codes and conducted bending member tests with high strength rebars, to compare and analyze use and non-use of development length calculation formulas.