The loading pattern’s influence on the stress increment in prestressing steel and bending moment resistance in multi-span members post-tensioned with unbonded tendons.
Choose format
RIS BIB ENDNOTEThe loading pattern’s influence on the stress increment in prestressing steel and bending moment resistance in multi-span members post-tensioned with unbonded tendons.
Publication date: 04.12.2015
Technical Transactions, 2015, Civil Engineering Issue 1-B (11) 2015, pp. 87-96
https://doi.org/10.4467/2353737XCT.15.081.3881Authors
The loading pattern’s influence on the stress increment in prestressing steel and bending moment resistance in multi-span members post-tensioned with unbonded tendons.
During the design process of members post-tensioned with unbonded tendons, deformations of the whole structure between anchorages, having impact on ultimate value of prestressing force, shall be considered. The conducted researches enabled the separation of several parameters influencing the stress increase in unbonded tendons – i.a. the loading pattern in multi-span members. This paper presents selected codes
are shown and compared.
[1] Building Code Requirements for Structural Concrete (ACI 318M–14).
[2] PN-EN 1992-1-1:2004 Eurokod 2: Projektowanie konstrukcji z betonu – Część 1: Reguły ogólne i reguły dla budynków (Eurocode 2: Design of concrete structures ‒ Part 1-1: General rules and rules for buildings).
[3] PN-B-03264:2002 Konstrukcje betonowe, żelbetowe i sprężone. Obliczenia statyczne i projektowanie (Plain, reinforced and prestressed concrete structures. Analysis and structural design).
[4] Harajli M., Hijazi S., Evaluation of the Ultimate Steel Stress in Partially Prestressed Concrete Members, PCI Journal, Vol. 36, No. 1 1991, 62-82.
[5] Harajli M., On the Stress in Unbonded Tendons at Ultimate: Critical Assessment and Proposed Changes, ACI Structural Journal, Vol. 103, No. 6, 2006, 803-812.
[6] Harajli M., Tendon Stress at Ultimate in Continuous Unbonded Post-Tensioned Members: Proposed Modification of ACI 318, Eq. (18-4) and (18-5), ACI Structural Journal, Vol. 109, No. 2, 2012, 183-192.
[7] Lee L.H., Moon J.H., Lim J.H., Proposed Methodology for Computing of Unbonded Tendon Stress at Flexural Failure, ACI Structural Journal, Vol. 96, No. 6, 1999, 1040-1048.
[8] Naaman A., Alkhairi F., Stress at Ultimate in Unbonded Post-Tensioning Tendons: Part II ‒ Proposed Methodology, ACI Structural Journal, Vol. 88, No. 6, 1991, 683-692.
[9] Politalski W., Przyrost naprężeń w wewnętrznych cięgnach bez przyczepności w betonowych, sprężonych elementach zginanych, Rozprawa doktorska (Stress increase in internal unbonded tendons in prestressed concrete flexural members. Doctoral thesis), July 2015.
[10] Seruga A., Politalski W., Graniczne naprężenia stali sprężającej w elementach zginanych sprężonych cięgnami bezprzyczepnościowymi, Czasopismo Techniczne, 1-B/2008, 109-133.
[11] Yang K. H., Kang H.-K., Equivalent Strain Distribution Factor for Unbonded Tendon Stress at Ultimate, ACI Structural Journal, Vol. 108, No. 2, 2011, 217-226.
Information: Technical Transactions, 2015, Civil Engineering Issue 1-B (11) 2015, pp. 87-96
Article type: Original article
Titles:
The loading pattern’s influence on the stress increment in prestressing steel and bending moment resistance in multi-span members post-tensioned with unbonded tendons.
The loading pattern’s influence on the stress increment in prestressing steel and bending moment resistance in multi-span members post-tensioned with unbonded tendons.
Institute of Building Materials and Structures, Faculty of Civil Engineering, Cracow University of Technology
Published at: 04.12.2015
Article status: Open
Licence: None
Percentage share of authors:
Article corrections:
-Publication languages:
English