Results 131 to 140 of about 776 (186)

Ultimate Strength of Concrete Box Girder Bridge

Journal of the Structural Division, 1974
Results obtained in a study of a large-scale, two-span, four-cell reinforced concrete box girder model are presented. The model, which was a 1:2.82 scale replica of a prototype, had overall plan dimensions of 72 ft (21.14 m) long by 12 ft (3.66 m) wide.
Jack G. Bouwkamp, Alexander C. Scordelis, S. Tanvir Wasti   +2 more
openaire   +1 more source

Performance estimation of prestressed concrete box girders

Proceedings of the Institution of Civil Engineers - Engineering and Computational Mechanics, 2010
A composite layered approach is adopted in this paper for the analysis of prestressed concrete box girders, which have complex behaviour. The multilayer shell element is made up of many layers with different thickness, and different material models are assigned to various layers so that the structural performance can be directly connected with the ...
T. Ch. Madhavi, M. Sekar, V. Paramasivam
openaire   +1 more source

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
openaire   +1 more source

Concrete Box-Girder Bridges

1982
<p>The box girder is today the most widely used superstructure in cocnrete bridge construction. The aim of this document is to relieve the engineer of the study of today's hardly surveyable mass of literature on the subject so that he can better devote that time to the actual design of the bridge.
Jörg Schlaich, Hartmut Scheef
openaire   +1 more source

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 ...
openaire   +1 more source

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
openaire   +1 more source

Steel–Concrete Composite Box Girder Bridges

1999
This chapter focuses on straight steel–concrete composite box-girder bridges. A single box girder with multiple cells is economical for very long spans. Multiple webs reduce the flange shear lag and also share the shear forces. A composite box section usually consists of two webs, a bottom flange, two top flanges and shear connectors welded to the top ...
Yusuf Saleh, Lian Duan
openaire   +1 more source

Need for Diaphragms in Concrete Box Girders

Journal of the Structural Division, 1971
The action of diaphragms in single-cell concrete box girders is covered with particular reference to torsional loading. A simple analysis of the distortion of boxes is presented in which the webs are treated as beams on elastic foundations. An empirical factor for the effective span of the top and bottom plates has been selected to agree with ...
Denison Campbell-Allen, Raymond J. L. Wedgwood   +1 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source