During the steam curing process, some initial prestress is lost due to the effect of high temperature. Limited number of quantitive evaluation has been reported on thermal loss of tendon during steam curing process. In this study, a theoretical evaluation was derived for the amount of prestress loss in prestressed concrete member during steam curing process. The equation devide overall process to 3 stages : from initial state to bonding state between concrete and tendon; just before cutting; and after cutting. The evaluation predicted the amount of prestress loss in the order of 7% of initial prestress force by direct thermal effect through all curing procedures. To validate the equation which estimate the amount of prestress loss, experimental studies should be performed.

• 고민혁(중앙대학교 건축공학과 석사과정) | Ko, Minhyeok
• 이차돈(중앙대학교 건축공학과 교수) | Lee, Chadon Corresponding Author