IDEALIZATION OF HYSTERETIC BEHAVIOR OF PRESTRESSED CONCRETE MEMBERS AND ASSEMBLAGES CONSIDERING BOND-SLIP BETWEEN PRESTRESSING STEEL AND CONCRETE

摘要

The authors conducted an analytical work on a prestressed concrete sub-frame assembled by post-tensioning. Layered element analysis considering bond-slip characteristics of prestressing tendon was used. The adopted parameters were the ratio of the average effective prestress to 0.2% offset yield stress of the prestressing steel and bond characteristic between the prestressing steel and concrete. The analytical results showed that the bond property had large influence on the flexural failure type of the member. Based on the analytical results, a flexural hysteresis model of prestressed concrete members was proposed. The proposed model showed better agreement with the calculated results than the idealizations proposed in the past.