Browse > Article
http://dx.doi.org/10.4334/JKCI.2007.19.6.755

Experimental Study on Flexural Behavior of PSC I Girder and the Effect of External Prestressing  

Lee, Byeong-Ju (Korea Expressway Transportation & Technology Institute)
Park, Jae-Guen (Dept. of Civil Engineering, Sungkyunkwan University)
Kim, Moon-Young (Dept. of Civil Engineering, Sungkyunkwan University)
Shin, Hyun-Mock (Dept. of Civil Engineering, Sungkyunkwan University)
Park, Chang-Ho (Korea Expressway Transportation & Technology Institute)
Publication Information
Journal of the Korea Concrete Institute / v.19, no.6, 2007 , pp. 755-762 More about this Journal
Abstract
For the evaluation of the load carrying capacity of the deteriorated PSC I girder bridge in service load state and the verification of the grade to the reinforcement effect of actual bridge strengthened by external prestressing tendons, the field test using vehicles is applied widely. Because this teat was executed in elastic range, the investigation of the characteristics of behavior caused by live load is only available. And it is impossible to estimate load carrying capacity in limit state and nonlinear behavior after that a crack is appeared. In this study, the 27-year-old prestressed concrete girder bridge is used and various load tests are performed, so we evaluate the behavior characteristics of the bridge in service load state and ultimate load state, and estimate the load carrying capacity of bridge. In addition, the artificial damages are induced from cutting internal tendons, and external tendons is added to strengthen it as much as vanished internal tendons. Next we compare the damage state with the strengthening state. In case of the application of external prestressing method to PSC I girder bridge, the present experiment result may decide more exactly the load carrying capacity of actual bridge, the amount for reinforcement, and the standard of quality control etc. at reinforcement work.
Keywords
PSC I girder; load carrying capacity; external prestressing method; nonlinear behavior; reinforcement effect;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Pessiki, S., Kaczinski, M., Wescott, H. H., 'Evaluation of Effective Prestress Force in 28-Year-Old Prestressed Concrete Bridge Beams', PCI Journal, Vol.41 No.6, 1996, pp.78-89   DOI
2 박상렬, '외부 프리스트레싱으로 보강된 프리스트레스트 콘크리트 보에서 프리스트레싱 강재의 극한응력', 콘크리트학회논문집, 16권 5호, 2004, pp.677-686
3 Shenoy, C. and Frantz, C., 'Structural Tests of 27-Year-Old Prestressed Bridge Beam', PCI Journal, Vol.36 No.5, 1991, pp.80-90   DOI
4 Tabatabai, H. and Dickson, T. J., 'Structural Evaluation of a 34-Year-Old Precast Post-Tensioned Concrete Girder', PCI Journal, Sep-Oct. 1993, pp.50-63
5 오병환, 김광수, 'PSC 합성거더 실교량의 극한거동 및 하중분배 특성연구', 대한토목학회논문집, 21권 5-A호, 2001, pp.761-771
6 박창호, 이병주, '외부 강선 파단실험을 통한 노후 PSC 교량의 보강 효과 평가', 한국구조물진단학회논문집 9권 3호, 2005, pp.178-186
7 박창호, 이병주, 'PSC 교량의 외부 강선 보강효과에 관한 실험연구', 대한토목학회 학술발표회논문집, 2003, pp.1430-1435
8 박창호, 이병주, 'PSC I 거더의 극한거동에 관한 실험 연구', 한국구조물진단학회 학술발표회논문집, 6권 2호, 2002, pp.177-181
9 Aparicio A. C., Ramos G., and Casas J. R., 'Testing of Externally Prestressed Concrete Beams', Engineering Structures Vol.24 No.1, 2000, pp.73-84   DOI   ScienceOn
10 Naaman, A. E., Burns, N., French, C., Gamble, W. L. and Mattock, A. H. 'Stresses in Unbonded Prestressing Tendons at Ultimate: Recommendation', ACI Structural Journal, Vol.99, No.4, 2002, pp.518-529
11 Ng C. K., 'Tendon Stress and Flexural Strength of Externally Prestressed Beams', ACI Structural Journal, Vol.100 No.5, 2003, pp.644-653