Construction Issues in Steel Curved-Girder Bridges

1996 ◽  
Vol 1544 (1) ◽  
pp. 64-70
Author(s):  
Michael A. Grubb ◽  
John M. Yadlosky ◽  
Sheila Rimal Duwadi
Keyword(s):  
Steel Bridges ◽  
Concrete Bridges ◽  
Depth Information ◽  
Successful Completion ◽  
Curved Bridges ◽  
Design Decisions ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Curved Girder Bridges ◽  
Curved Steel

The construction of horizontally curved steel bridges is generally more complex than the construction of comparable straight-girder bridges of similar span. Curved-girder bridges, once completed, have generally performed as intended. Most problems that have occurred with curved-girder bridges have been related to fabrication and assembly procedures or unanticipated and unaccounted for deformations that occur during construction. As a result, these construction issues take on primary importance in the successful completion of the structure. Successful completion requires that each phase of construction proceeds as anticipated to ensure that the final structure is at the correct elevation to provide proper deck drainage and good riding quality. In some cases, construction issues for curved bridges have been given little or no special consideration by designers, or, at the very least, no more consideration than has been given to these issues for straight bridges. Thus, there is a need to better identify these issues, assemble and provide more in depth information on each of these issues to the design community, and emphasize their importance to designers. The significance of construction issues to complex horizontally curved steel bridges is in many ways analogous to their prominence in the design of segmental concrete bridges; construction issues often drive the design decisions. The objective is to promote awareness in the design of horizontally curved steel bridges to some of these construction issues.

scholarly journals Load Distribution Factors for Curved Concrete Slab-on-Steel I-Girder Bridges

2021 ◽  
Author(s):  
Mohammed A. Al-Hashimy
Keyword(s):  
Parametric Study ◽  
Load Distribution ◽  
Concrete Slab ◽  
Steel Bridges ◽  
Urban Systems ◽  
Lateral Bending ◽  
Curved Bridges ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Curved Steel

The use of complex interchanges in modern highway urban systems have increased recently in addition to the desire to conform to existing terrain; both have led to increase the demand for horizontally curved bridges. One type of curved bridges consists of composite concrete deck over steel I-girders which has been the preferred choice due to its simplicity in fabrication, transportation and erection. Although horizontally curved steel bridges constitute roughly one-third of all steel bridges being erected today, their structural behavior still not well understood. Due to its geometry, simple presence of curvature in curved bridges produces non uniform torsion and consequently, lateral bending moment (warping or bi-moment) in the girder flanges. The presence of the lateral bending moments would significantly complicate the analysis and the design of the structure. Hence, a parametric study is required to scrutinize a simplified method in designing horizontally curved steel I-girder bridges. A parametric study is conducted, using the finite-element analysis software "SAP2000", to examine the key parameters that may influence the load distribution on the curved composite steel girders. Based on the data generated from the parametric study, sets of empirical equations are developed for the moment and shear distribution factors for straight and curved steel I-girder bridges when subjected to the Canadian Highway Bridge Design Code (HCHBDC) truck loading.

scholarly journals Load Distribution Factors for Curved Concrete Slab-on-Steel I-Girder Bridges

2021 ◽  
Author(s):  
Mohammed A. Al-Hashimy
Keyword(s):  
Parametric Study ◽  
Load Distribution ◽  
Concrete Slab ◽  
Steel Bridges ◽  
Urban Systems ◽  
Lateral Bending ◽  
Curved Bridges ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Curved Steel

The use of complex interchanges in modern highway urban systems have increased recently in addition to the desire to conform to existing terrain; both have led to increase the demand for horizontally curved bridges. One type of curved bridges consists of composite concrete deck over steel I-girders which has been the preferred choice due to its simplicity in fabrication, transportation and erection. Although horizontally curved steel bridges constitute roughly one-third of all steel bridges being erected today, their structural behavior still not well understood. Due to its geometry, simple presence of curvature in curved bridges produces non uniform torsion and consequently, lateral bending moment (warping or bi-moment) in the girder flanges. The presence of the lateral bending moments would significantly complicate the analysis and the design of the structure. Hence, a parametric study is required to scrutinize a simplified method in designing horizontally curved steel I-girder bridges. A parametric study is conducted, using the finite-element analysis software "SAP2000", to examine the key parameters that may influence the load distribution on the curved composite steel girders. Based on the data generated from the parametric study, sets of empirical equations are developed for the moment and shear distribution factors for straight and curved steel I-girder bridges when subjected to the Canadian Highway Bridge Design Code (HCHBDC) truck loading.

Construction Engineering for Horizontally Curved Steel I-Girder Bridges

2010 ◽  
Vol 2152 (1) ◽  
pp. 49-56
Author(s):  
Brandon Chavel ◽  
Shawn Tunstall ◽  
Jason Fuller ◽  
Matthew Bunner
Keyword(s):  
Construction Engineering ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Curved Steel

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 Review on Analysis of Free Vibrational Horizontally Curved Bridges

2021 ◽  
Vol 9 (VII) ◽  
pp. 3463-3469
Author(s):  
Manish Mishra
Keyword(s):  
Finite Element ◽  
Concrete Bridges ◽  
Design Parameters ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Fundamental Frequencies ◽  
Girder Bridge ◽  
Vibration Parameters ◽  
Horizontally Curved Bridges ◽  
Composite Steel

Curved I-girder concrete bridges give an outstanding answer to urban congestion, traffic, and pollution concerns, but the combined flexibility and torque responses of the bridges make their behavior exceedingly complex. That is why structural design parameters for simplified design procedures are in high demand, as measured by empirical equations. To analyze the effect on the free vibrational reaction of curve composite steel-concreteI-girder bridge with varying vibration parameters, this research employs a sensitivity analysis. To learn the fundamental frequency and the geometric configuration of the model forms, a parametric investigation is performed. Finite element Modelling of composite steel/concrete frameworks, deformable shear model, fine element formula, finite element mounting, finite element calibration, and finite element modeling, etc. Modeling finite element. Sensitivity research to draw the fundamental frequencies for the evaluated bridges. The parametric research outcomes. The results. Curved I-girder bridges of composite steel with single span or multi-span lengths are presented.

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