The purpose of this experimental study is to evaluate that KCI2012 equation for the development length, ldt, of headed bars can be used to calculate the lap length of headed deformed bars in grade SD400~500 for high strength concrete. Test results showed that specimens with lap lengths equal to 1.3ldt had maximum flexural strengths as 0.84~0.90 times as the nominal flexural strengths. These observations indicate that 1.3 is unsuitable to the tensile lap length of headed deformed bars in grade SD400~500 for high strength concrete.

• 김승훈(한밭대학교 건축공학과) | Kim, Seung Hun 교신저자
• 박인우(한밭대학교 건축공학과) | Park, In Woo
• 백종범(한밭대학교 건축공학과) | Baek, Jong Beom