Results 131 to 140 of about 800 (165)

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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Transverse assessment of a concrete box girder bridge

Proceedings of the Institution of Civil Engineers - Bridge Engineering, 2017
This paper looks at the beneficial effects of geometric arching from haunches, web continuity and compressive membrane action in the design and assessment of box girder top slabs. The paper initially reviews tests relevant to arching action in box girders and then analyses recent tests on box girder slab strips.
Abdullah Zaid, David Collings
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Temperature variation of concrete box girder bridge

Frontiers of Architecture and Civil Engineering in China, 2009
On the basis of theoretical analysis and measurement on site, the temperature gradients and its variation on concrete box girder bridges resulting from ambient temperature, solar radiation, and structural temperature fields were discussed. With the help of the heat transfer theory and finite element method (FEM), the heat flux of the surface of ...
Jian Wang, Zhi Fang
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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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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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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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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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Assessment and identification of concrete box-girder bridges

IABSE Reports, 2019
<p>This work consists in identify and assess the properties related to material, geometry and physic sources, in a pre-stressed concrete bridge through a surrogate model. The use of this mathematical model allows to generate a relationship between bridge properties and its dynamic response, with the purpose to develop a tool to predict the ...
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