Modified Skew Bending Model for Segmental Bridge with Unbonded Tendons

Huang, Zhen; Liu, X. L.

doi:10.1061/(asce)1084-0702(2006)11:1(59)

Cited by 18 publications

(11 citation statements)

References 3 publications

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“…Huang and Liu [6] presented an analytical model to investigate the behavior of a prestressed segmental bridge with unbonded tendons under combined torsion, bending, and shear loading. It was concluded that the ultimate bending and shear strengths of monolithic and segmental girders were nearly equal.…”

Section: Introductionmentioning

confidence: 99%

Behaviors of segmental concrete box beams with internal tendons and external tendons under bending

Yuan

Dai

Dasong³

et al. 2013

Engineering Structures

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Section: Introductionmentioning

confidence: 99%

Behaviors of segmental concrete box beams with internal tendons and external tendons under bending

Yuan

Dai

Dasong³

et al. 2013

Engineering Structures

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“…Many investigations of segmental structures with external prestressing were carried out in the last few decades, but most of them were restricted to a load combination of bending and shear such as in the research carried out by [2,6,7] . Only a few investigations dealt with the influence of a combined loading of bending, shear and torsion on the behaviour of segmental structures such as by [3][4][5] presented analytical model to investigate the behaviour of a prestressed segmental bridge with unbounded tendons under combined loading of torsion, bending and shear. A modified skew bending model was developed to calculate the load-carrying capacity of segmental bridges subjected to combined forces.…”

Section: Existing Research On Eps Bridgesmentioning

confidence: 99%

Effect of Torsion on Externally Prestressed Segmental Concrete Bridge with Shear Key

H.¹

2009

American Journal of Engineering and Applied Sciences

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Externally Prestressed Segmental (EPS) concrete box sections are widely used in the construction of bridge structures today. EPS concept has become an attractive tool for rehabilitation and strengthening of existing bridges which have insufficient strength and/or excessive deflection and cracking. Problem statement: EPS bridges are affected by combined stresses (bending, shear, normal, and torsional) at the joint interface between the segments. However, very limited researchers studied this type of bridges under combined stresses. Approach: This paper presented an experimental investigation of the structural behaviour of EPS bridge with shear key under torsion. Four beams were tested, each containing three segments that were presetressed using two external tendons. A parametric study of two different external tendon layouts as well as different levels of torsional force applied by different load eccentricities was conducted. Results: The effect of torsion was evaluated in terms of vertical deflections, concrete and tendon strains, failure loads and failure mechanisms. It was concluded that torsion has a significant effect in the structural behaviour of external prestressed segmental box girder beams. Torsion not only alters failure load of the beam but also changes the type of failure mechanism. It was also investigated that harp tendon layout results in better structural behaviour in term of deflection and tendon strain as compared with the straight tendon. Recommendations: It recommended including the effect of joint (flat and shear key) type as well as the effect of tendon layout under torsion to obtain comprehensive behavior of EPS bridge

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“…Kordina et al [2] and Falkner et al [3] investigated experimentally the influence of a combined shear, bending, and torsion on the behavior of segmental structures. Huang and Liu [4] presented a modified skew bending model. It could calculate the capacity of prestressed segmental beams with internal unbonded tendons subjected to combined forces.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Externally Prestressed Segmental Box Girders Under Bending, Shear, and Torsion

Etman

Khalil²,

El-Shafey³

et al. 2022

International Journal of Advances in Structural and Geotechnica

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Analysis of Externally Prestressed Segmental Bridges (EPSBs) still needs more effort. At an earlier stage, an experimental investigation was carried out by the authors. The experimental investigation was consisted of ten specimens having different joint configurations, and it was divided into two phases. The first phase contains five specimens constructed with multiple small-amplitude shear keys in accordance with AASHTO. The parameters selected for the first phase were different levels of prestressing force in tendons as well as different levels of applied torsion. The second phase contained four segmental specimens and a monolithic one. The joints in the second phase took four forms: multiple small-amplitude shear keys, large-reinforced shear key, steel shear connectors, and UHP-SHCC joint connecting the tension flange. This paper proposed an analytical procedure to calculate the full prestressing load and partial prestressing load based on the forces' equilibrium. Skew Bending Model that inspected by Huan and Liu, 2006, to calculate the load-carrying capacity for segmental beams with internal unbonded tendons subjected to combined bending, shear, and torsion modified to calculate the ultimate capacity of EPSBs and gave satisfactory agreement with the experimental results.

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Modified Skew Bending Model for Segmental Bridge with Unbonded Tendons

Cited by 18 publications

References 3 publications

Behaviors of segmental concrete box beams with internal tendons and external tendons under bending

Behaviors of segmental concrete box beams with internal tendons and external tendons under bending

Effect of Torsion on Externally Prestressed Segmental Concrete Bridge with Shear Key

Analysis of Externally Prestressed Segmental Box Girders Under Bending, Shear, and Torsion

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