scholarly journals Dynamic Analysis of Simply Supported Box Girder Bridges with Intermediate Diaphragm Using Higher Order Finite Strip

2013 ◽  
Vol 21 (5) ◽  
pp. 1-13
Author(s):  
A.A. Abdul-Razzak ◽  
A.N. Revan
Keyword(s):  
Dynamic Analysis ◽  
Higher Order ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Simply Supported ◽  
Finite Strip ◽  
Girder Bridges

Design of horizontally curved composite box-girder bridges: a simplified approach

1995 ◽  
Vol 22 (1) ◽  
pp. 93-105 ◽  
Author(s):  
M. S. Cheung ◽  
S. H. C. Foo
Keyword(s):  
Radius Of Curvature ◽  
Curved Bridges ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Cross Sectional ◽  
Box Girder ◽  
Horizontally Curved ◽  
Finite Strip ◽  
Girder Bridges ◽  
Bridge Models

Because of their excellent torsional capacity, box girders are used extensively in modern bridge construction having curved alignments. Applications of most design codes have been limited to bridges where the radius of curvature is much greater than the span length and cross-sectional dimensions. To meet the practical requirements arising during the design process, simple design methods are needed for curved bridges. This paper presents the results of a parametric study on the relative behaviour of curved and straight box-girder bridges and on the development of a simplified design method for the combined longitudinal moment of curved bridges. The combined moment includes the effects of flexure, torsion, and distortion. Three simply supported concrete-steel composite bridge models, including single-cell, twin-cell, and three-cell box girders and subjected to loadings as specified in the Ontario Highway Bridge Design Code, were analyzed using the finite strip method. The parameters considered in the study include types of cross section; types, locations, and magnitudes of loads; span lengths; and radius of curvature. Preliminary analysis of the results suggests that the behaviour of horizontally curved box-girder bridges is dependent on a variety of parameters, but most importantly on the span-to-radius ratio. Empirical relationships for combined longitudinal moment between curved and straight box-girder bridges are also proposed. Key words: bridge, curved, composite, design, finite strip.

scholarly journals Dynamic Analysis of Curved Box Girder Bridges

2014 ◽  
Vol 22 (2) ◽  
pp. 98-108
Author(s):  
Dr. Ayad A. Abdul Razzak ◽  
Zeena A. Mohammad
Keyword(s):  
Dynamic Analysis ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges

Bracing for composite box girder bridges

1984 ◽  
Vol 11 (4) ◽  
pp. 844-853 ◽  
Author(s):  
Fernando A. Branco ◽  
Roger Green
Keyword(s):  
Torsional Stiffness ◽  
Scale Model ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Finite Strip ◽  
Girder Bridges ◽  
Open Section ◽  
Box Beams ◽  
Construction Loads

For steel–concrete composite box girder bridges, the steelwork is generally erected first and then the concrete deck cast. During construction the girder may be subjected to a variety of construction loads. If the girder is a flexible open section, and lacks distortional or torsional stiffness, the cross section will deform or twist excessively; such difficulties with box girder construction have been reported. Bracing systems should be installed to increase the torsional and distortional stiffness of the open section during construction. A finite strip analysis of the influence of bracing systems on open section box girders is presented and compared with test results obtained using a one-quarter scale model. With the analysis, the influence of ties, distortional bracing, torsion boxes, and top chord bracing on the behaviour of torsionally open box girders is examined. Simplified design methods are also presented whereby the bracing forces and the stresses arising from the distortion of the section can be computed. Key words: bridges (box girder), bridges (steel), box beams, torsional distortion, bending distortion, bracing, construction safety.

DYNAMIC ANALYSIS OF PRESTRESSED CONCRETE BOX-GIRDER BRIDGES BY USING THE BEAM SEGMENT FINITE ELEMENT METHOD

2011 ◽  
Vol 11 (02) ◽  
pp. 379-399 ◽  
Author(s):  
Z.-C. WANG ◽  
W.-X. REN
Keyword(s):  
Finite Element ◽  
Dynamic Analysis ◽  
Prestressed Concrete ◽  
Element Formulation ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Beam Segment ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges

A beam segment element formulation is presented for the dynamic analysis of prestressed concrete box-girder bridges, which can conveniently takes into account the effects of the restrained torsion, distortion, transverse local deformation, diaphragms, and prestressing tendons of prestressed concrete box-girder bridges. The spatial displacement field of the beam segment element is directly represented by the nodal degrees of freedom of the corner points. The stiffness matrix and mass matrix of such a segment element are formulated based on the principle of stationary total potential energy in elastic system dynamics. The proposed beam segment element formulation is then implemented to carry out the free vibration analysis of a real case prestressed concrete box-girder bridge. In terms of both natural frequencies and mode shapes, the formulation is verified by the three-dimensional (3D) finite element analysis using a commercial package. It is demonstrated that the proposed beam segment element formulation is suitable and efficient for the dynamic analysis of prestressed concrete box-girder bridges with the advantages of less element numbers and enough accuracy. It is expected that this methodology can be an effective approach for the further dynamic response analysis under all kinds of dynamic loads such as earthquakes, winds, vehicles, and their interaction.

Dynamic Analysis of Curved Continuous Multiple-Box Girder Bridges

2007 ◽  
Vol 12 (2) ◽  
pp. 184-193 ◽  
Author(s):  
Magdy Samaan ◽  
John B. Kennedy ◽  
Khaled Sennah
Keyword(s):  
Dynamic Analysis ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges

Statistical Analysis and Evaluation on Cracks of Simply Supported-to-Continuous Split-Type Box Girder Bridges

2012 ◽  
Vol 256-259 ◽  
pp. 1533-1536 ◽  
Author(s):  
Zhen Xing Ren ◽  
Wei Zhang ◽  
Lei Ren
Keyword(s):  
Evaluation Method ◽  
Highway Bridges ◽  
Technical Condition ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Effective Prevention ◽  
Simply Supported ◽  
Girder Bridges ◽  
Condition Evaluation ◽  
Technical Basis

In this paper, the crack diseases of 106 simply supported-to-continuous split-type box girder bridges from G55 Taichang and G55 Changjin highways were statistically analyzed by the number of bridges, the frequency of each meter cracks appeared and the degree of cracks developed. According to the norm that Standard for Technical Condition Evaluation of Highway Bridges and which was recommended by the department of transportation, the crack diseases were evaluated by the two indexes, which were maximum crack width and crack length divided corresponding section size . The conclusion provides a technical basis for the effective prevention and treatment of cracks in the design, construction, repair and maintenance in the future. The proposed crack disease statistics method and evaluation method are provided with practical application value for management and maintenance departments to effectively evaluate the crack development and make decisions to repair.

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