The cracking of prestressed girders influenced by decreased bond of tendons

2016 ◽  
Author(s):  
V Borzovič ◽  
K Gajdošová ◽  
M Pecník ◽  
J Laco
Keyword(s):  
Prestressed Girders

CRITICAL SECTIONS FOR FLEXURE IN PRESTRESSED GIRDERS WITH INCLINED TOP FLANGES

PCI Journal ◽  
1971 ◽  
Vol 16 (6) ◽  
pp. 59-69
Author(s):  
M. A. Saeedҟ ◽  
J. B. Kennedy
Keyword(s):  
Prestressed Girders ◽  
Critical Sections

Capacity of prestressed concrete bridge decks under fatigue loading

2021 ◽  
Author(s):  
Eva O. L. Lantsoght ◽  
Cor van der Veen ◽  
Rutger Koekkoek ◽  
Henk Sliedrecht
Keyword(s):  
Prestressed Concrete ◽  
Large Scale ◽  
Fatigue Loading ◽  
Membrane Action ◽  
Variable Amplitude ◽  
Girder Bridges ◽  
Prestressed Girders ◽  
Series Of Experiments ◽  
Prestressed Concrete Bridge ◽  
Compressive Membrane Action

<p>In The Netherlands, existing slab-between-girder bridges with prestressed girders and thin transversely prestressed concrete decks require assessment. The punching capacity was studied in a previous series of experiments, showing a higher capacity thanks to compressive membrane action in the deck. Then, concerns were raised with regard to fatigue loading. To address this, two series of large-scale experiments were carried out, varying the number of loads (single wheel print versus double wheel print), the loading sequence (constant amplitude versus variable amplitude, and different loading sequences for variable amplitude), and the distance between the prestressing ducts. An S-N curve is developed for the assessment of slab-between-girder bridges. The experiments showed that compressive membrane actions enhances the capacity of thin transversely prestressed decks subjected to fatigue loading.</p>

Analysis of Tensile Stresses in Transfer Zone of Prestressed Concrete U-Beams

2005 ◽  
Vol 1928 (1) ◽  
pp. 134-141 ◽  
Author(s):  
Dongzhou Huang ◽  
Mohsen Shahawy
Keyword(s):  
Prestressed Concrete ◽  
Practical Method ◽  
Tensile Stresses ◽  
Prestressed Girders ◽  
Plate Elements ◽  
Mechanical Models ◽  
Concentrated Forces ◽  
Shell Plate ◽  
Finite Shell ◽  
Transfer Zone

Prestressed U-beam bridges compare favorably in cost and appearance to traditional concrete I-beam bridges. Consequently, U-beam bridges are gaining in popularity and usage, especially when aesthetic issues are deemed important. U-beam bridges first appeared in Florida in 2000; however, during construction, cracks developed in the webs of the U-beams. This paper presents results of an analysis of representative cracking of U-beams and proposes a practical method for the transfer zone stirrup design. For the purpose of the analysis, the U-beam is divided into a series of finite shell-plate elements, and the prestressing tendons are simulated as a number of concentrated forces. Two different mechanical models of the U-beams are developed on the basis of the stages of construction. Analytical results show that high tensile stresses occur in the end zone of the U-beam because of the prestressing tendons and that these tensile stress must be properly considered in bridge design. The research results are applicable to the design of prestressed U-beams and similar types of prestressed girders.

Shear design of high strength concrete prestressed girders

2014 ◽  
Vol 8 (4) ◽  
pp. 373-387 ◽  
Author(s):  
Emad L. Labib ◽  
Hemant B. Dhonde ◽  
Thomas T. C. Hsu ◽  
Y. L. Mo
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Strength Concrete ◽  
Shear Design ◽  
Prestressed Girders

Cost optimization of concrete bridge infrastructure

2003 ◽  
Vol 30 (5) ◽  
pp. 841-849 ◽  
Author(s):  
Mostafa A Hassanain ◽  
Robert E Loov
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
High Performance ◽  
High Performance Concrete ◽  
Cost Optimization ◽  
Concrete Bridges ◽  
Concrete Bridge ◽  
Analysis And Design ◽  
Prestressed Girders ◽  
Advanced Analysis

Recent surveys have indicated that between 30% and 40% of all bridges in North America are in various states of deterioration. Funding is limited owing to the existence of other deficient components of the transportation infrastructure. It is clear, therefore, that the return on the available funding needs to be maximized. This paper presents a review of publications on cost optimization of concrete bridge components and systems and then continues with a review of the state-of-the-art in life-cycle cost (LCC) analysis and design of concrete bridges. The main objective of the paper is to encourage bridge engineers to move towards the increased use of advanced analysis and design optimization methods.Key words: bridge, concrete, cost, high-performance concrete, infrastructure, life-cycle cost, optimization, prestressed girders, reliability.

Analysis of prestressed girders with openings

1993 ◽  
Vol 47 (3) ◽  
pp. 505-510 ◽  
Author(s):  
H. Abdalla ◽  
J.B. Kennedy
Keyword(s):  
Prestressed Girders
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