Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
Structural Engineering and Mechanics Volume 38, Number 5, June10 2011 , pages 675-696 DOI: https://doi.org/10.12989/sem.2011.38.5.675 |
|
|
Flexural strength of prestressed concrete members with unbonded tendons |
||
Deuck Hang Lee and Kang Su Kim
|
||
Abstract | ||
It is difficult to accurately predict the flexural strength of prestressed members with unbonded tendons, unlike that of prestressed members with bonded tendons, due to the unbonded behavior between concrete and tendon. While there have been many studies on this subject, the flexural strength of prestressed members with unbonded tendons is still not well understood, and different standards in various countries often result in different estimation results for identical members. Therefore, this paper aimed to observe existing approaches and to propose an improved model for the ultimate strength of prestressed members with unbonded tendons. Additionally, a large number of tests results on flexural strength of prestressed members with unbonded tendons were collected from previous studies, which entered into a database to verify the accuracy of the proposed model. The proposed model, compared to existing approaches, well estimated the flexural strength of prestressed members with unbonded tendons, adequately reflecting the effects of influencing factors such as the reinforced steel ratio, the loading patterns, and the concrete strength. The proposed model also provided a reasonably good estimation of the ultimate strength of over-reinforced members and high-strength concrete members. | ||
Key Words | ||
prestressed; post-tension; unbonded; prestressing tendon; flexural strength. | ||
Address | ||
Deuck Hang Lee and Kang Su Kim: Department of Architectural Engineering, University of Seoul, Seoul, Korea | ||