Combined boundary element and finite element analysis of composite box girder bridges

According to the flexural and torsional characteristics of curved thin-walled box girder with the effect of initial curvature, 7 basic displacements of curved box girder are determined. And then the strain-displacement calculation correlations were established. Under the curvilinear coordinate system, a three-noded curved girder finite element which has 7 degrees of freedom per node for the vibration characteristic and dynamic response analysis of curved box girder is constructed. The shape functions are used as the interpolation functions of variable curvature and variable height to accommodate to the variation of curvature and section height. A MATLAB numerical analysis program has been implemented.

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Finite Element Analysis of Continuous Curved Box-Girder Bridge

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.454.183 ◽

2013 ◽

Vol 454 ◽

pp. 183-186

Author(s):

Qi Yong You

Keyword(s):

Finite Element ◽

Internal Force ◽

Calculation Model ◽

Box Girder Bridges ◽

Element Analysis ◽

Box Girder ◽

Girder Bridges ◽

Internal Forces ◽

Box Girder Bridge ◽

Girder Bridge

The calculations of plan truss and beam-girder method on straight bridge were analyzed, which determined right beam-girder method calculation model of the box-girder bridge. Based on this model, the different radius continuous curved box-girder bridges were simulated by finite element, and then the internal forces of the bridge were obtained. The calculations of inner beam and outer beam show the change rule of internal force and bridge radius. The reasonable calculation methods of continuous curved box girder bridges are obtained, which can offer help to the bridge designers.

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Longitudinal stress over supports of concrete box-girder bridges

Canadian Journal of Civil Engineering ◽

10.1139/l81-022 ◽

1981 ◽

Vol 8 (2) ◽

pp. 155-164 ◽

Cited By ~ 1

Author(s):

A. Ghali ◽

M. S. Cheung ◽

W. H. Dilger ◽

M. Y. T. Chan

Keyword(s):

Finite Element ◽

Beam Theory ◽

Type Equation ◽

Box Girder Bridges ◽

Element Analysis ◽

Box Girder ◽

Girder Bridges ◽

Beam Type ◽

Concrete Box Girder Bridges ◽

Classical Beam Theory

This paper describes a study of the values of longitudinal moments/stresses and their distribution at sections over the supports of continuous box-girder bridges. A series of continuous box-girder bridges are analyzed using the finite element method. Results from the finite element analysis are compared with the classical beam theory which is commonly used in the design office for this type of bridge. It is found that the use of the classical beam theory assuming knife-edge supports usually results in an overestimation of the support moments. A modified beam-type equation for the support moments is proposed here for the design of continuous box-girder bridges.

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Study on Crack Causes and Strengthening Measures of Large Span PC Continuous Box Girder Bridges

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.3551 ◽

2010 ◽

Vol 163-167 ◽

pp. 3551-3554

Author(s):

Wei Peng ◽

Zhi Xiang Zha

Keyword(s):

Prestressed Concrete ◽

Load Test ◽

Box Girder Bridges ◽

Element Analysis ◽

Box Girder ◽

Girder Bridges ◽

Long Span ◽

Concrete Box Girder Bridges ◽

Girder Bridge ◽

Engineering Projects

This template Based on cracks observation and finite element analysis of real engineering projects as well as bridge load test after reinforcement, causes and types of cracks in prestressed concrete box girder bridges and treating measurements are systematically studied. The results obtained from the calculation are presented to demonstrate the effect of sensitive factors, such as arrangement of longitudinal prestressed tendons, the magnitude of vertical prestressed force, temperature gradient, etc. The results show that the arrangement of longitudinal prestressed tendons and the magnitude of vertical prestressed force take key roles in cracks control of box girder webs. Lots of treating measurements are presented in accordance with different types of cracks, some of them are applied to a reinforcement engineering of a long span pretressed concrete continuous box girder bridge with cracks. Load test after reinforcement of the bridge demonstrates the reasonability of the treating measurements. Several design recommendations and construction measures about reinforcements and some sensitive factors mentioned above are proposed to control cracks.

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Effect of Web Inclination on Box Girder Bridges

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.l7988.1091220 ◽

2020 ◽

Vol 9 (12) ◽

pp. 232-236

Keyword(s):

Finite Element ◽

Bridge Engineering ◽

Easy Access ◽

Finite Element Models ◽

Box Girder Bridges ◽

Box Girder ◽

Class A ◽

Girder Bridges ◽

Live Loads ◽

Support Reactions

Bridge is a key element in any transportation system which provides easy access over physical obstacles like road, valley, water bodies etc. without closing the way underneath. Among various types, use of box girder type bridges are gaining popularity in bridge engineering because of its better stability, serviceability, economy, aesthetics, structural efficiency and rigidity in torsion. In this study, a box girder is analyzed by changing its web inclination angle to the horizontal (90°, 83°, 76°, 69°, 62°) using finite element based software CSi Bridge. Finite element models are developed keeping material properties, span length, boundary conditions as constant parameters. All these models are analyzed for self-weight, including load of wearing coat and crash barrier, and live loads specified by Indian Road Congress (IRC) namely IRC Class 70R and IRC Class-A loading. Responses in terms of torsional moment, longitudinal moment, support reactions, displacement and stresses are determined.

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