Results 181 to 190 of about 12,108 (230)

Strengthening Concrete Box Girder Bridges

Journal of Structural Engineering, 1990
There is, at a theoretical level, a direct relationship between the effects of prestressing, temperature, support settlement, and creep redistribution in concrete box girder bridges. At a more practical level, the net effect of thermal gradients or creep redistribution is to impose a positive secondary moment onto the structure, which can be balanced ...
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Prefabrication of concrete box girder bridges

1991
The technologies described in this paper allow the construction of prestressed concrete bridges, precast in a monolithic form both for simply supported and continuous beams. It combines durability, speed of construction and economy. Particular reference is made to construction of a viaduct with a continuous box girder deck under construction in a ...
Gallo, Pellegrino C., Nati, Gabriele
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Torsional Design of Hybrid Concrete Box Girders

Journal of Bridge Engineering, 2006
Hybrid concrete box-girder bridges that include prestressed slabs and corrugated steel webs provide a major improvement over traditional prestressed concrete box-girder bridges. To reduce the self-weight, high strength concrete is used for the top and bottom slabs and corrugated steel webs are employed for the webs.
Y. L. Mo, Yu-Lin Fan
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Structural Response of Concrete Box Girder Bridge

Journal of the Structural Division, 1973
Results obtained in a study of a large-scale, two-span, four cell reinforced concrete bridge model are presented. The model, which was a 1:2.82 scale replica of a prototype, had overall plan dimensions of 72 ft (21 m) long by 12 ft (3.7 m) wide. The various computer programs used in obtaining theoretical results are described and compared. Experimental
Alexander C. Scordelis, Jack G. Bouwkamp, S. Tanvir Wasti   +2 more
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The Collapse and Reconstruction of a Prestressed Concrete Box-Section Girder

1977
During the construction of a prefabricated hall roof, a 25 m long prestressed box-section girder collapsed. The major cause of the failure was an inadequate structural design of the support regions. There was no transverse end beam present and support bearing points were not placed beneath the webs of the girder.
Bachmann, Hugo, Horisberger, Werner
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Concrete Box-Girder Bridges as Sandwich Plates

Journal of the Structural Division, 1970
A relatively simple, accurate method for the complete determination of internal moments, shears, and deflections in concrete box girder bridges with statically applied external vertical loads has been developed and is described. The method of analysis used is based on the concept of replacing the actual structure by an equivalent uniform plate which ...
James G. Arendts, Wallace W. Sanders
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Web design of box girders concrete bridges

Engineering Structures, 2013
Abstract The purpose of this paper is to introduce a new design approach including the Ultimate Limit State (ULS) due to fatigue. Different criteria for the design of those webs are compared by means of shear-bending moment interaction diagrams, as an attempt to identify the most realistic one.
Ricardo Gaspar, Fernando Rebouças Stucchi   +1 more
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Thermal Effects on Box Girder Concrete Bridges

Key Engineering Materials, 2017
Thermal load, especially vertical temperature gradient, is an important factor that should be considered during the bridge design procedure. In the world, several researches focusing on temperature gradient was made, mostly in USA and China, but only a few analyzed actual temperature gradients measuring at European bridges.
Martin Moravcik, Lukas Krkoska
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Approximate Analysis of Concrete Box Girder Bridges

Journal of Structural Engineering, 1988
The purpose of this paper is to show that the actual three-dimensional behavior of a box-girder bridge as predicted by a folded-plate, finite-strip, or finite-element analysis can be approximated by using some simple membrane equations in conjunction with a plane-frame analysis.
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Behaviour of post-tensioned concrete box girders

Bridge Engineering, 2004
This paper describes the results obtained to date from a study of the strains developed in two post-tensioned, prestressed concrete box girder bridges both during their construction and subsequent service lives. The instrumentation that was used is described and the simplification and representation of the material properties that were required for ...
R. J. Lark, R. W. Howells, B. I. G. Barr
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