Closure to “Canadian Bridge Design Code Provisions for Fiber‐Reinforced Structures” by Baidar Bakht, George Al‐Bazi, Nemy Banthia, Moe Cheung, Marie‐Anne Erki, Martin Faoro, Atsuhiko Machida, Aftab A. Mufti, Kenneth W. Neale, and Gamil Tadros

2001 ◽  
Vol 5 (2) ◽  
pp. 138-138
Author(s):  
Baidar Bakht ◽  
George Al‐Bazi ◽  
Nemy Banthia ◽  
Moe Cheung ◽  
Marie‐Anne Erki ◽  
...  
Keyword(s):  
Fiber Reinforced ◽  
Design Code ◽  
Bridge Design ◽  
Code Provisions

Canadian Bridge Design Code Provisions for Fiber-Reinforced Structures

2000 ◽  
Vol 4 (1) ◽  
pp. 3-15 ◽  
Author(s):  
Baidar Bakht ◽  
George Al-Bazi ◽  
Nemy Banthia ◽  
Moe Cheung ◽  
Marie-Anne Erki ◽  
...  
Keyword(s):  
Fiber Reinforced ◽  
Design Code ◽  
Bridge Design ◽  
Code Provisions

Canadian Bridge Design Code Provisions for Fiber-Reinforced Structures

2001 ◽  
Vol 5 (2) ◽  
pp. 137-138
Author(s):  
Ayman M. Okeil ◽  
Sherif El-Tawil ◽  
Mohsen Shahawy ◽  
Baidar Bakht ◽  
George Al-Bazi ◽  
...  
Keyword(s):  
Fiber Reinforced ◽  
Design Code ◽  
Bridge Design ◽  
Code Provisions

Evaluation of the new Canadian highway bridge design code shear provisions for concrete beams with fiber-reinforced polymer reinforcement

2008 ◽  
Vol 35 (6) ◽  
pp. 609-623 ◽  
Author(s):  
Ahmed K. El-Sayed ◽  
Brahim Benmokrane
Keyword(s):  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Highway Bridge ◽  
Test Results ◽  
Fiber Reinforced ◽  
Design Code ◽  
Bridge Design ◽  
Shear Design ◽  
Reinforced Polymer

The Canadian highway bridge design code (CHBDC) contains provisions for designing concrete members with fiber-reinforced polymer (FRP) reinforcement. In the second edition of the code, new shear design procedures for FRP-reinforced sections are provided. These procedures are consistent with those for steel-reinforced members in the code, in consideration of some modifications that account for the substantial differences between FRP and steel reinforcement. The shear approach adopted in the CHBDC follows the traditional approach of Vc + Vs for shear design. This paper presents an evaluation of this approach by comparing it with experimental shear strengths of available test data on beams longitudinally reinforced with FRP bars and with or without FRP stirrups. In addition, the CHBDC approach was compared with the FRP shear design provisions currently in effect in North America using the available test results. The comparison shows that the CHBDC method significantly underestimates the shear strength of FRP-reinforced concrete beams. A proposed modification to this method is presented and verified against available test results.

Equivalent area of voided slabs

1998 ◽  
Vol 25 (4) ◽  
pp. 797-801 ◽  
Author(s):  
Leslie G Jaeger ◽  
Baidar Bakht ◽  
Gamil Tadros
Keyword(s):  
Simple Expression ◽  
Technical Note ◽  
Axial Stiffness ◽  
Highway Bridge ◽  
Slab Thickness ◽  
Design Code ◽  
Bridge Design ◽  
Equivalent Thickness ◽  
Simple Alternative ◽  
Equivalent Area

In order to calculate prestress losses in the transverse prestressing of voided concrete slabs, it is sometimes convenient to estimate the thickness of an equivalent solid slab. The Ontario Highway Bridge Design Code, as well as the forthcoming Canadian Highway Bridge Design Code, specifies a simple expression for calculating this equivalent thickness. This expression is reviewed in this technical note, and a simple alternative expression, believed to be more accurate, is proposed, along with its derivation. It is shown that the equivalent solid slab thickness obtained from consideration of in-plane forces is also applicable to transverse shear deformations, provided that the usual approximations of elementary strength of materials are used in both cases.Key words: axial stiffness, equivalent area, shear deformation, transverse prestressing, voided slab, slab.

Reliability-based design criteria for timber bridges in Ontario

1986 ◽  
Vol 13 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Andrzej S. Nowak ◽  
Raymond J. Taylor
Keyword(s):  
Reliability Index ◽  
Structural Reliability ◽  
Structural Safety ◽  
Design Code ◽  
Bridge Design ◽  
Limit States ◽  
Acceptance Criterion ◽  
Reliability Based Design ◽  
Load And Resistance Factor ◽  
Timber Bridges

The new Ontario Highway Bridge Design Code (OHBDC) is based on limit states theory and therefore uses a load and resistance factor format. This paper deals with the development of the basis for the timber bridge design provisions (OHBDC). Three structural systems are considered: sawn timber stringers, laminated nailed decks, and prestressed laminated decks. The latter system has been successfully used in Ontario for the last 7 years.The acceptance criterion in calculation of load and resistance factors is structural reliability. It is required that bridges designed using the new code must have a reliability equal to or greater than a preselected target value. Reliability is measured in terms of the reliability index. The safety analysis is performed for a structural system rather than for individual members. The live load model was developed on the basis of available truck survey data. Material properties are based on extensive in-grade test results. Numerical examples are included to demonstrate the presented approach. Key words: bridge deck, design code, prestressed timber, reliability, reliability index, stringers, structural safety, timber bridges.

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