Results 201 to 210 of about 37,069 (262)

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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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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Modeling Noise Radiation From Concrete Box Girder Bridges as an Infinitely Long Periodic Structure Excited by a High-Speed Train

, 2021
Concrete box girder bridges occupy over 80% of the total mileage of the Chinese high-speed railway. The box girder structure has many natural modes of low frequencies, which can be excited by a train passing at high-speed, generating low-frequency ...
He Yuanpeng, G. Cheng, Jian Han, X. Sheng   +3 more
semanticscholar   +1 more source

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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Crack-based serviceability assessment of post-tensioned segmental concrete box-girder bridges

, 2021
Post-tensioned segmental box-girders produce elegant and robust solutions for long-span concrete bridges. Concrete cracking and excessive long-term deflections would greatly impact the in-service performance of this type of structure. This study presents
Zhiqi He, Yonghui Li, Tian Xu, Zhao Liu, Z. Ma   +4 more
semanticscholar   +1 more source

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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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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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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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
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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
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