|
Title |
Experimental Study on Effect of Confinement Details for Lap Splice of Headed Deformed Reinforcing Bars in Grade SD400 and SD500
|
|
DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.1.062 |
|
Keywords |
확대머리 이형철근 ; 철근콘크리트 보 ; 겹침이음 ; 정착 ; 구속상세 Headed reinforcing bar ; Reinforced concrete beam ; Lap splice ; Anchorage ; Confinement details |
|
Abstract |
KCI 2012 and ACI318-11 contains development length provisions for the use of headed deformed bars in tension and does not allow their tension lap splices. In ACI318-11, the confinement factor, such as transverse reinforcement factor, is not used to calculate the development length of headed bars. The purpose of this experimental study is to evaluate the effect of confinement details to the lap splice performance of headed deformed reinforcing bars in grade SD400 and SD500. The confinement details are stirrups and tie-down bars in lap zone. Test results showed that specimens with only stirrups had the brittle failure and could not increase lap strengths, and that specimens with composite confinements by stirrups and tie-down bars had the flexural strengths over than nominal flexural strengths. Stirrups with tie-down bars can have an effect on improvement in lap splice of headed bars in grade SD400 and SD500.
|