Damage Assessment of Concrete Bridge Structures Using Ultrasonic Tomography Technique

2021 ◽  
pp. 163-174
Author(s):  
Thirumalaiselvi A. ◽  
Saptarshi Sasmal
Keyword(s):  
Damage Assessment ◽  
Concrete Bridge ◽  
Ultrasonic Tomography ◽  
Bridge Structures

Shear Assessment of Concrete Bridge Deck Slabs

2017 ◽  
Vol 738 ◽  
pp. 110-119 ◽  
Author(s):  
Radoslav Vida ◽  
Jaroslav Halvonik
Keyword(s):  
Current Model ◽  
Shear Capacity ◽  
Concrete Bridge ◽  
Current Standard ◽  
Concrete Members ◽  
Deck Slabs ◽  
Bridge Structures ◽  
Bridge Deck Slabs ◽  
Concrete Bridge Deck ◽  
New Generation

The transitions from old STN standards to Eurocode standards brought several problems into bridge design and assessment. Shear reinforcement is now often required even in concrete members, which were previously allowed to be built without it. Moreover, assessment of existing reinforced concrete bridge structures often shows their insufficiency in shear capacity, which means that they should be strengthened or replaced. Work on new generation of Eurocodes is currently in progress and current model for shear assessment should be replaced by a new (and more precise) one. This paper deals with the problem of shear assessment of concrete bridge according to current standard and also according to the new shear models that are under consideration.

STATIC AND DYNAMIC PERFORMANCE EVALUATION OF A PRE-STRESSED CONCRETE BRIDGE THROUGH FIELD TESTING AND MONITORING

2009 ◽  
Vol 09 (04) ◽  
pp. 711-728 ◽  
Author(s):  
C. S. CAI ◽  
M. ARAUJO ◽  
A. NAIR ◽  
X. SHI
Keyword(s):  
Quantitative Methods ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Field Tests ◽  
Field Measurements ◽  
Field Testing ◽  
Concrete Bridge ◽  
Bridge Structures ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

This paper presents field tests performed on a slab-on-girder pre-stressed concrete bridge. The bridge was tested under static loading, crawling loading, and dynamic loading. A full three-dimensional finite element prediction under both static and dynamic loadings was carried out and the results were compared with the field measurements. While acoustic emission (AE) monitoring of bridge structures is not a new vista, the method has not been fully exploited in bridge monitoring. Though numerous quantitative methods have been proposed, they have not yet developed to be useful for actual field tests of bridges. Therefore, in this study, an attempt was made to use the intensity analysis technique for damage quantification using the AE method.

3D Analysis of Bridges Changing Structural Systems – An Easy Design Tool

2015 ◽  
Vol 796 ◽  
pp. 69-75
Author(s):  
Vladimír Křístek ◽  
Lukáš Kadlec
Keyword(s):  
Cross Sections ◽  
Design Tool ◽  
Structural Systems ◽  
Concrete Bridge ◽  
3D Analysis ◽  
Box Girders ◽  
Reliable Determination ◽  
The Real ◽  
Bridge Structures ◽  
Primary Advantage

Due to increase of requirements on accuracy of structural analyses, practically applicable computational tools for reliable determination of the real structural performance of bridges are needed. A method is proposed for the true full 3D analysis which can be applied to achieve the real spatial behaviour of concrete bridge structures taking into account rheological phenomena and changes of structural systems. Particularly, the effects of shear lag, shear performance of webs of box girders, warping torsion, warping of cross-sections, distortional effects, state of stresses in the singular regions, the real prestress loss, etc., can be correctly determined. The method combines conventional approaches (based on the elementary beamtype assumptions) for calculating the time development of the internal forces due to rheological phenomena and changes in the structural system during construction and routine commercial FEM software intended for calculating spatial shell structures. The method is capable to give the true 3D prediction of structure behaviour by using only commercially available software. The primary advantage of the proposed method is its ease of application which allows the true 3D performance to be determined from simple calculations. The method offers the designers of concrete bridge girders an ideal design tool. The correct 3D simulation can lead to more efficient and economical designs.

On the use of steel-free concrete bridge decks in continuous span bridges

1999 ◽  
Vol 26 (5) ◽  
pp. 667-672 ◽  
Author(s):  
A A Mufti ◽  
J P Newhook
Keyword(s):  
Bridge Deck ◽  
Steel Reinforcement ◽  
Experimental Program ◽  
Concrete Bridge ◽  
Reinforced Polymers ◽  
Bridge Structures ◽  
Negative Moment ◽  
Fibre Reinforced Polymer ◽  
Concrete Bridge Deck ◽  
Negative Bending

This note discusses the use of the steel-free concrete bridge deck technology in continuous span bridge structures. Conventional slab-on-girder design often utilizes the longitudinal steel reinforcement in the deck to resist the negative bending moments created at the internal piers of continuous bridges. The steel-free bridge deck is devoid of all internal steel reinforcement and hence requires an alternate design approach which is presented in this note. A key aspect of this approach is the recommended use of fibre-reinforced polymer reinforcement to control cracking of the deck over the intermediate supports. Limiting these crack widths is essential to the durability performance of the concrete, particularly in freeze-thaw environments. The results of an experimental program are also reviewed. The tensile stresses from the global longitudinal negative moment are shown to have little effect on the punching behaviour of the slab. It is noted that the concepts presented in this note were utilized in the construction of a three-span highway bridge which incorporated the steel-free bridge deck technology.Key words: bridges, design, continuous span, concrete decks, punching-shear, fibre-reinforced polymers.

Reliability-based capacity design for reinforced concrete bridge structures

2010 ◽  
pp. 1-12 ◽  
Author(s):  
Mitsuyoshi Akiyama ◽  
Hiroshi Matsuzaki ◽  
Hai T. Dang ◽  
Motoyuki Suzuki
Keyword(s):  
Reinforced Concrete ◽  
Concrete Bridge ◽  
Capacity Design ◽  
Reinforced Concrete Bridge ◽  
Bridge Structures
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