Stresses, deformations and damages of various joints in precast concrete segmental box girder bridges subjected to direct shear loading

Bridges built with adjacent precast, prestressed concrete box-girders are a popular and economical solution for short-span bridges because they can be constructed rapidly. The top flanges of the precast box girders form the bridge deck surface. A shear key is introduced between the adjacent boxes over the depth of the top flange (i.e. 225 mm thick as the thickness of the box's top flange). Canadian Highway Bridge Design Code, CHBDC specifies empirical equations for the moment and shear distribution factors for selected bridge configurations but not for adjacent precast concrete box-girder bridge type. In this study, a parametric study was conducted, using the 3D finite-element modeling, and a set of simplified equations for the moment, shear and deflection distribution factors for the studied bridge configuration was developed.

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Laboratory Evaluation of Ultrahigh-Performance Concrete Shear Key for Prestressed Adjacent Precast Concrete Box Girder Bridges

Journal of Bridge Engineering ◽

10.1061/(asce)be.1943-5592.0000987 ◽

2017 ◽

Vol 22 (2) ◽

pp. 04016113 ◽

Cited By ~ 10

Author(s):

Husam H. Hussein ◽

Shad M. Sargand ◽

Fouad T. Al Rikabi ◽

Eric P. Steinberg

Keyword(s):

Precast Concrete ◽

Laboratory Evaluation ◽

Box Girder Bridges ◽

Box Girder ◽

Shear Key ◽

Girder Bridges ◽

Concrete Box Girder ◽

Concrete Box Girder Bridges

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Load Distribution In Adjacent Precast "Deck Free" Concrete Box-Girder Bridges

10.32920/ryerson.14644587 ◽

2021 ◽

Author(s):

Waqar Khan

Keyword(s):

Prestressed Concrete ◽

Precast Concrete ◽

Box Girders ◽

Box Girder Bridges ◽

Box Girder ◽

Girder Bridges ◽

Concrete Box Girder ◽

Concrete Box Girder Bridges ◽

Girder Bridge ◽

The Moment

Bridges built with adjacent precast, prestressed concrete box-girders are a popular and economical solution for short-span bridges because they can be constructed rapidly. The top flanges of the precast box girders form the bridge deck surface. A shear key is introduced between the adjacent boxes over the depth of the top flange (i.e. 225 mm thick as the thickness of the box's top flange). Canadian Highway Bridge Design Code, CHBDC specifies empirical equations for the moment and shear distribution factors for selected bridge configurations but not for adjacent precast concrete box-girder bridge type. In this study, a parametric study was conducted, using the 3D finite-element modeling, and a set of simplified equations for the moment, shear and deflection distribution factors for the studied bridge configuration was developed.

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Comparative studies of medium-span box girder bridges with other precast systems'

Canadian Journal of Civil Engineering ◽

10.1139/l84-060 ◽

1984 ◽

Vol 11 (3) ◽

pp. 396-403 ◽

Cited By ~ 2

Author(s):

Felix Kulka ◽

T. Y. Lin

Keyword(s):

Prestressed Concrete ◽

Precast Concrete ◽

The United States ◽

Box Girders ◽

Box Girder Bridges ◽

Box Girder ◽

Girder Bridges ◽

Large Size ◽

Federal Highway ◽

Near Future

Recognizing the large market for medium-span bridges, the building industry has focused its attention on the economical construction of these structures. Mechanized construction and the use of standardized members have become important aspects for this type of structure, owing to the numbers to be constructed in the near future and the large size of some of these projects. This paper deals with a comparison of four structural prestressed concrete systems applicable to medium spans: box sections, I-girders, T-girders, and wing sections. Cost comparisons are presented, and conclusions as to the choice of structural sections for optimum medium-span construction are included. The material is derived from a study the authors' company prepared for the United States Federal Highway Authority on the feasibility of standardization of segmental box girder bridges. Key words: bridges, box girders, precast concrete, prestressed concrete.

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