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

Yuan, Aimin; Dai, Hangs; Dasong, Sun; Cai, Jun

doi:10.1016/j.engstruct.2012.09.005

Cited by 47 publications

(14 citation statements)

References 12 publications

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“…Since all the beams showed similar behaviour regarding the strain evolution in the ordinary steel rebars under the applied loads, only the experimental results of Beam BS1 was given in Yuan et al [38] and Jiang et al [39] reached the same conclusion in their studies on segmental beams prestressed with steel tendons.…”

Section: Strain In Rebarsmentioning

confidence: 88%

Flexural behaviour of precast segmental concrete beams internally prestressed with unbonded CFRP tendons under four-point loading

Pham

Hao

et al. 2018

Engineering Structures

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This study investigates the use of carbon fibre reinforced polymer (CFRP) tendons on precast segmental beams (PSBs) to tackle the corrosion problems which are likely to occur at joint locations of PSBs prestressed with steel tendons. Up to date, the use of CFRP tendons was extensively documented for monolithic beams while their application on PSBs has not been reported yet. Three precast segmental T-section beams including two beams with unbonded CFRP and one with steel tendons were built and tested under four-point loads in this study. The test results showed that CFRP tendons can be well used to replace the steel tendons on PSBs. The beams with CFRP tendons demonstrated both high strength and high ductility as compared to the beam with steel tendons. However, the stresses in the unbonded CFRP tendons at ultimate loading conditions of the tested beams were low, ranging from only about 66% to 72% of the nominal breaking tensile strength. The type of joints i.e. dry and epoxied, greatly affects the initial stiffness of the beams but has no effect on the opening of joints at ultimate loading stage. Moreover, a comprehensive examination on four existing code equations to predict the stress in the unbonded tendons showed that the four examined codes predicted well

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Section: Strain In Rebarsmentioning

confidence: 88%

Flexural behaviour of precast segmental concrete beams internally prestressed with unbonded CFRP tendons under four-point loading

Pham

Hao

et al. 2018

Engineering Structures

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“…The previous literature has mainly focused on the flexural behaviors of precast normalconcrete segmental beams (Ng 2003 [13]; Li 2007 [14]; Yuan et al 2013 [15]; Jiang et al 2016 [16]). A relatively small number of experiments have been conducted to investigate the shear behavior of precast normal-strength concrete segmental bridges.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Shear Behavior of Precast High-Strength Concrete Segmental Beams with External Tendons and Dry Joints

Zhang

et al. 2022

Buildings

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Precast high-strength concrete segmental beams with external tendons and dry joints (ED-PHCSBs) have become a potential alternative for achieving accelerated bridge construction due to their lighter self-weight and easier installation. In order to investigate the shear behavior of ED-PHCSBs, eight precast concrete segmental specimens were fabricated and tested to failure. For comparison purposes, one externally prestressed high-strength concrete monolithic beam was also investigated. The primary parameters, including concrete strength, shear span-depth ratio, stirrup ratio, joint number, and joint location, were adopted. Test results indicated that increasing the concrete strength or stirrup ratio can effectively improve the shear capacity of the ED-PHCSBs. The shear span-depth ratio was inversely proportional to shear strength for all specimens. The results also revealed that the joint number had a marginal effect on the defections and stresses of the external tendons of ED-PHCSBs. AASHTO 2017 and Chinese code 2018 can conservatively estimate the shear strength of ED-PHCSBs. Considering the actual failure modes of the precast beams, a calculation method based on a modified strut-and-tie model was proposed. The average and standard deviation of the ratios of the test results to the predicted value of the proposed method were 0.98 and 0.08, respectively. It indicated that the proposed formula was more accurate.

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“…al. [2] tested the bending strength of concrete box beams with several ratios of the number of internal tendons to the number of external tendons (6:2, 4:4 and 2:6). The results indicated that the ratio had a significant effect on the load-carrying capacity, ductility and failure mode of the beams.…”

Section: Introductionmentioning

confidence: 99%

Behaviour of prestressed box beam strengthened with CFRP under effect of strand snapping

2020

JCE

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Behaviour of prestressed box beam strengthened with CFRP under effect of strand snapping The study aims to evaluate behaviour of a prestressed box beam strengthened with the Carbon Fibre Reinforced Polymer (CFRP) under the snapping of prestressed strands. Three external prestressed box beams are tested until failure. The evaluation focuses on the load carrying capacity, cracks pattern and width, and torsional capacity of the beam. The results show that the use of CFRP causes significant reduction of beam deflection and an increase of its loading capacity under snapping effects. The cracks do not appear at the bottom of the beam where the CFRP is placed, and the torsion stiffness of the beam increases considerably.

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

Cited by 47 publications

References 12 publications

Flexural behaviour of precast segmental concrete beams internally prestressed with unbonded CFRP tendons under four-point loading

Flexural behaviour of precast segmental concrete beams internally prestressed with unbonded CFRP tendons under four-point loading

Experimental Study on Shear Behavior of Precast High-Strength Concrete Segmental Beams with External Tendons and Dry Joints

Behaviour of prestressed box beam strengthened with CFRP under effect of strand snapping

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