Stresses in external and internal unbonded tendons: Unified methodology and design equations

Journal of Structural Engineering

Volumn 136, Issue 9, 2010, Pages 1055-1065

  He, Zhi Qi ^a   Liu, Zhao ^a  

^a China   (China)

Author keywords

External tendon; Flexural strength; Second order effect; Stress increment; Unbonded tendon

Indexed keywords

EXTERNAL TENDON; FLEXURAL STRENGTH; SECOND ORDER EFFECT; STRESS INCREMENT; UNBONDED TENDONS;

BENDING STRENGTH; CONCRETE BEAMS AND GIRDERS; DESIGN; EQUATIONS OF STATE; FORECASTING;

TENDONS;

EID: 77955739307     PISSN: 07339445     EISSN: None     Source Type: Journal    
DOI: 10.1061/(ASCE)ST.1943-541X.0000202     Document Type: Article

References (36)

1. Alkhairi, F. M. (1991). " On the flexural behavior of concrete beams prestressed with unbonded external and internal tendons." Ph.D. thesis, Univ. of Michigan, Ann Arbor, Mich.
2. Ament, J. M., Chakrabarti, P. R., and Putcha, C. S. (1997). " Comparative statistical study for the ultimate stress in unbonded post-tensioning." ACI Struct. J. ASTJEG 0889-3241, 94 (2), 171-180.
3. American Association of State Highway and Transportation Officials (AASHTO). (1994). AASHTO LRFD bridge design specification, 1st Ed., Washington, D.C.
4. American Association of State Highway and Transportation Officials (AASHTO). (2004). AASHTO LRFD bridge design specification, 3rd Ed., Washington, D.C.
5. American Concrete Institute (ACI). (2008). " Building code requirements for structural concrete (ACI 318-08) and commentary (ACI 318R-08)." ACI 318-08, Farmington Hills, Mich.
6. Au, F. T. K., and Du, J. S. (2004). " Prediction of ultimate stress in unbonded prestressed tendons." Mag. Concrete Res. MCORAV 0024-9831, 56 (1), 1-11.
7. Balaguru, P. N. (1981). " Increase of stress in unbonded tendons in prestressed concrete beams and slabs." Can. J. Civ. Eng. CJCEB8 0315-1468, 8, 262-268. 10.1139/l81-033
8. Campbell, T. I., and Chouinard, K. L. (1991). " Influence of nonprestressed reinforcement on the strength of unbonded partially concrete members." ACI Struct. J. ASTJEG 0889-3241, 88 (5), 546-551.
9. Chakrabarti, P. R. (1995). " Ultimate stress for unbonded post-tensioning tendons in partially prestressed beams." ACI Struct. J. ASTJEG 0889-3241, 92 (6), 689-697.
10. Dall'Asta, A., Ragni, L., and Zona, A. (2007). " Simplified method for failure analysis of concrete beams prestressed with external tendons." J. Struct. Eng. JSENDH 0733-9445, 133 (1), 121-131. 10.1061/(ASCE)0733- 9445(2007)133:1(121) (Pubitemid 46012315)
11. Du, G. C., and Tao, X. K. (1985). " Ultimate stress of unbonded partially prestressed concrete beams." PCI J. PCIJEE 0887-9672, 30 (6), 72-91.
12. Du, J. S., and Liu, X. L. (2003). " Research on the variations of unbonded prestressed tendon stresses based upon the structural deformation." China Civ. Eng. J. ZZZZZZ 1000-131X, 36 (8), 12-19.
13. Ghallab, A., and Beeby, A. W. (2004). " Calculating stress of external prestressing tendons." Proc. Inst. Civ. Eng., Struct. Build. PCESEL 0965-0911, 157 (4), 263-278.
14. Ghallab, A., and Beeby, A. W. (2005). " Factors affecting the external prestressing stress in externally strengthened prestressed concrete beams." Cem. Concr. Compos. CCOCEG 0958-9465, 27, 945-957. 10.1016/j.cemconcomp.2005.05.003
15. Harajli, M. H. (1990). " Effect of span-depth ratio on ultimate steel stress in unbonded prestressed concrete members." ACI Struct. J. ASTJEG 0889-3241, 87 (3), 305-312.
16. Harajli, M. H. (2006). " On the stress in unbonded tendons at ultimate: Critical assessment and proposed changes." ACI Struct. J. ASTJEG 0889-3241, 103 (6), 803-812.
17. Harajli, M. H., and Kanj, M. Y. (1991). " Ultimate flexural strength of concrete members prestressed with unbonded tendons." ACI Struct. J. ASTJEG 0889-3241, 88 (6), 663-673.
18. Harajli, M. H., Khairallah, N., and Nassif, H. (1999). " Externally prestressed members: Evaluation of second-order effects." J. Struct. Eng. JSENDH 0733-9445, 125 (10), 1151-1161. 10.1061/(ASCE)0733-9445(1999)125:10(1151)
19. Harajli, M. H., Mabsout, M. E., and Al-Hajj, J. A. (2002). " Response of externally post-tensioned continuous members." ACI Struct. J. ASTJEG 0889-3241, 99 (5), 671-180.
20. Lee, L. H., Moon, J. H., and Lim, J. H. (1999). " Proposed methodology for computing of unbonded tendon stress at flexural failure." ACI Struct. J. ASTJEG 0889-3241, 96 (6), 1040-1050.
21. Lou, T. J., and Xiang, Y. Q. (2006). " Finite element modeling of concrete beams prestressed with external tendons." Eng. Struct. ENSTDF 0141-0296, 28, 1919-1926. 10.1016/j.engstruct.2006.03.020 (Pubitemid 44524693)
22. MacGregor, R. J. G. (1989). " Strength and ductility of externally post-tensioned segmental box girders." Ph.D. thesis, Univ. of Texas at Austin, Austin, Tex.
23. Manisekar, R., and Senthil, R. (2006). " Stress at ultimate in unbonded post tensioning tendons for simply supported beams: A state-of-the-art review." Adv. Struct. Eng. ZZZZZZ 1369-2768, 9 (3), 321-335. 10.1260/136943306777641922 (Pubitemid 43953267)
24. Mutsuyoshi, H., Tsuchida, K., Matupayont, S., and Machida, A. (1995). " Flexural behavior and proposal of design equation for flexural strength of externally PC members." Proc., JSCE DGRHAD 0289-7806, 508 (26), 67-76.
25. Naaman, A. E., and Alkhairi, F. M. (1991a). " Stress at ultimate in unbonded post-tensioning tendons: Part 1-Evaluation of the-state-of-art." ACI Struct. J. ASTJEG 0889-3241, 88 (5), 641-651.
26. Naaman, A. E., and Alkhairi, F. M. (1991b). " Stress at ultimate in unbonded post-tensioning tendons: Part 2-Proposed methodology." ACI Struct. J. ASTJEG 0889-3241, 88 (6), 683-692.
27. Naaman, A. E., Burns, N., French, C., Gamble, W. L., and Mattock, A. H. (2002). " Stresses in unbonded prestressing tendons at ultimate: Recommendation." ACI Struct. J. ASTJEG 0889-3241, 99 (4), 518-529.
28. Ng, C. K., and Tan, K. H. (2006a). " Flexural behavior of externally prestressed beams. Part I: Analytical model." Eng. Struct. ENSTDF 0141-0296, 28, 602-621.
29. Ng, C. K., and Tan, K. H. (2006b). " Flexural behavior of externally prestressed beams. Part II: Experimental investigation." Eng. Struct. ENSTDF 0141-0296, 28, 622-633. 10.1016/j.engstruct.2005.09.016 (Pubitemid 43055478)
30. Roberts-Wollmanm, C. L., and Kreger, M. E. (2005). " Stresses in external tendons at ultimate." ACI Struct. J. ASTJEG 0889-3241, 102 (2), 206-213.
31. Tam, A., and Pannell, F. N. (1976). " Ultimate moment resistance of unbonded partially prestressed reinforced concrete beams." Mag. Concrete Res. MCORAV 0024-9831, 28 (97), 203-208. 10.1680/macr.1976.28.97.203
32. Tan, K. H., and Ng, C. K. (1997). " Effects of deviators and tendon configuration on behavior of externally prestressed beams." ACI Struct. J. ASTJEG 0889-3241, 94 (1), 13-22.
33. Wang, J. Q., Liu, Z., and Lu, Z. T. (2005). " Stress increment of prestressing tendons based on deflection for unbonded or external prestressed beams." J. Southeast Uni., 35 (6), 915-919.
34. Wu, X. H., and Lu, X. L. (2003). " Tendon model for nonlinear analysis of externally prestressed concrete structures." J. Struct. Eng. JSENDH 0733-9445, 129 (1), 96-104. 10.1061/(ASCE)0733-9445(2003)129:1(96) (Pubitemid 40015775)
35. Yaginuma, Y. (1995). " Non-linear analysis of ultimate flexural strength of beams with external tendons." J. Prestressed Concr., 37 (3), 54-65.
36. Yang, L. (2005). " Study on the structural behaviors of externally prestressed concrete three-span continuous beams." Ph.D. thesis, Southwest Jiaotong Univ., Chengdu, China.