Box Girder Bridge Diaphragms with Openings

Sargious, Michel; Dilger, Walter H.; Hawk, Hugh

doi:10.1061/jsdeag.0005089

J. Struct. Div.

1979

DOI: 10.1061/jsdeag.0005089

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Box Girder Bridge Diaphragms with Openings

Michel Sargious

Walter H. Dilger

Hugh Hawk

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Load‐path modeling of pier diaphragms under vertical shear in concrete box‐girder bridges

Liu

2020

Structural Concrete

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Pier diaphragms are usually adopted in concrete box girder bridges to transmit shear forces from the webs to the bearings. The pier diaphragm under vertical shear acts as a side‐shearing loaded deep beam that is rarely studied in the literature. Through the load‐path modeling, this paper provides an analytical method for the design of pier diaphragms under vertical shear in concrete box‐girder bridges. Explicit equations are derived for the direct calculation of transverse tension forces in the pier diaphragms, which are critical for the determination of the amount of transverse reinforcement. Further comparative studies in this paper show that: (a) the side‐shearing loaded deep beam differs greatly with the top‐loaded beam in the aspect of elastic internal force distribution when the span‐to‐depth ratio of the diaphragm section is less than 1; (b) the proposed quantitative strut‐and‐tie models agree well with the elastic internal force distribution in the pier diaphragms with various configurations; and (c) the commonly used “direct‐strut model” is acceptable for the design of pier diaphragms with span‐to‐depth ratios greater than 1.5, while it would greatly underestimate the top tension force when the span‐to‐depth ratio is less than 1 (referred to as the “ultra‐deep member”).

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Load‐path modeling of pier diaphragms under vertical shear in concrete box‐girder bridges

Liu

2020

Structural Concrete

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Literature Review in Analysis of Box-Girder Bridges

Sennah

Kennedy

2002

J. Bridge Eng.

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Analysis techniques for folded plate roofs and cellular bridges general review and comparisons

Al-Masoudy

Al-Hadithy

2019

IOP Conf. Ser.: Mater. Sci. Eng.

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Folded plates have attracted profound interest in recent years because of their economic advantages and architectural appearance. In particular, their basic structural response is indeed logical enough, explicit and simple although its required numerical computation procedure is, in a little bit, boring. This type of structures have gained increasing popularity and offers more advantages than more complex structures, such as cylindrical shells, arches and right folded plate frames. Similarly, the thin-walled cellular bridge decks can be treated as a multi-folded plates structure. This study produces an overall review of the historical development of the most popular methods utilized for analysis the folded plate structures which are offered with their applications and how these methods are developed gradually. Four common methods are chosen in this paper to show their highlights of references particularizing in analysis of the above mentioned types of structure; the folded plate elasticity method (FPEM), finite element method (FEM), finite strip method (FSM) and spline finite strip method (SFSM). This investigation covers the elastic behavior, and the experimental researches on the elastic reaction of folded plate structures.

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Box Girder Bridge Diaphragms with Openings

Cited by 3 publications

References 0 publications

Load‐path modeling of pier diaphragms under vertical shear in concrete box‐girder bridges

Load‐path modeling of pier diaphragms under vertical shear in concrete box‐girder bridges

Literature Review in Analysis of Box-Girder Bridges

Analysis techniques for folded plate roofs and cellular bridges general review and comparisons

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