Tendon stress at ultimate in continuous unbonded post-tensioned members: Proposed modification of ACI 318, Eq. (18-4) and (18-5)

ACI Structural Journal

Volumn 109, Issue 2, 2012, Pages 183-192

  Harajli, Mohamed H ^a  

^a AMERICAN UNIVERSITY OF BEIRUT   (Lebanon)

Author keywords

External prestressing; Flexure; Post tensioning; Prestressing; Slabs; Stress; Unbonded tendons

Indexed keywords

EXTERNAL PRESTRESSING; FLEXURE; POSTTENSIONING; SLABS; UNBONDED TENDONS;

PRESTRESSING; STRESSES;

DESIGN;

EID: 84859154532     PISSN: 08893241     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (9)

1. ACI Committee 318, "Building Code Requirements for Structural Concrete (ACI 318-08) and Commentary," American Concrete Institute, Farmington Hills, MI, 2008, 473 pp.
2. AASHTO, "LRFD Bridge Design Specifications," American Association of State Highway and Transportation Officials, Washington, DC, 2010, 1632 pp.
3. Harajli, M. H., "On the Stress in Unbonded Tendons at Ultimate: Critical Assessment and Proposed Changes," ACI Structural Journal, V. 103, No. 6, Nov.-Dec. 2006, pp. 803-812. (Pubitemid 44932308)
4. Burns, N. H.; Charney, F. A.; and Vines, W. R., "Tests of One-Way Post-Tensioned Slabs with Unbonded Tendons," PCI Journal, V. 33, No. 5, Sept-Oct. 1978, pp. 66-83.
5. Burns, N.; Helwig, T.; and Tsujimoto, T., "Effective Prestress Force in Continuous Post-Tensioned Beams with Unbonded Tendons," ACI Structural Journal, V. 88, No. 1, Jan.-Feb. 1991, pp. 84-90.
6. Naaman, A. E., and Alkhairi, F. M., "Stress at Ultimate in Unbonded Post-Tensioned Tendons: Part 2-Proposed Methodology," ACI Structural Journal, V. 88, No. 6, Nov.-Dec. 1991, pp. 683-692.
7. Harajli, M. H., "Proposed Modification of AASHTO LRFD for Computing Stress in Unbonded Tendons at Ultimate," Journal of Bridge Engineering, ASCE, V. 16, No. 6, Nov. 2011, 11 pp.
8. 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, V. 99, No. 4, July-Aug. 2002, pp. 518-529.
9. Menegotto, M., and Pinto, P. E., "Method of Analysis for Cyclically Loaded Reinforced Concrete Plane Frames," IABSE Preliminary Report for Symposium on Resistance and Ultimate Deformability of Structures Acted on Well-Defined Repeated Loads, Lisbon, Portugal, 1973, pp. 15-22.