Experimental and Analytical Studies of U-Shaped Thin-Walled RC Beams Under Combined Actions of Torsion, Flexure and Shear

Xu, Jie; Chen, Shenggang; Guo, Quanquan; Ye, Yinghua; Diao, Bo; Mo, Y. L.

doi:10.1186/s40069-018-0245-8

Cited by 13 publications

(4 citation statements)

References 22 publications

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“…There has been a very limited amount of experimental research focusing on the torsional behavior of common building typologies and salient structural elements, such as non-planar RC walls. Some torsion-related experimental research has been conducted on RC U-shaped beams due to the wide application of these types of elements in rail viaduct engineering (Chen et al, 2016; Krpan and Collins, 1981b; Xu et al, 2018). However, the experimental results from beam specimens cannot be extrapolated to determine the expected performance on walls given the differences in (1) boundary conditions and restraints, (2) reinforcement detailing, (3) axial load, and (4) loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Tests on reinforced concrete U-shaped walls subjected to torsion and flexure

Hoult,

Doneux,

Pacheco de Almeida

2023

Earthquake Spectra

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This data paper describes an experimental campaign on two reinforced concrete (RC) U-shaped walls, including details of the test units, materials, test setup, loading protocol, instrumentation, primary observations and response of each unit during testing, organization of the test data in the public open source research data repository (DOI: 10.14428/DVN/FDJ4EU), and examples of derived data. The two wall units represent the lower stories of a half-scale 6-story prototype core wall that was designed for medium-to-high ductility. The tests conducted aimed at assessing the flexural and torsional response and capacity of RC U-shaped walls. The first wall unit, UW1, was tested for axial-flexure and subjected to quasi-static reverse-cyclic bending about its weak axis until failure. Furthermore, UW1 was subjected to an additional overturning moment to increase the shear span. The second wall unit, UW2, was tested for axial-torsion and subjected to a quasi-static reverse-cyclic rotation about its vertical axis until failure. Both wall units were subjected to a constant axial load ratio of 5%. A range of conventional instrumentation was used to capture salient global and local measurements of the wall, including three-dimensional (3D) digital image correlation on multiple faces. High-definition fiber-optic sensors were also utilized to capture the entire strain profile of several longitudinal reinforcing bars in each wall unit.

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Section: Introductionmentioning

confidence: 99%

Tests on reinforced concrete U-shaped walls subjected to torsion and flexure

Hoult,

Doneux,

Pacheco de Almeida

2023

Earthquake Spectra

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“…Wu et al [ 22 ] developed the corrosion-fatigue life prediction model for RC beams under the coupled effect of chloride attack and fatigue load based on Fick’s second law and Paris’ law. Recently, the research on U-shaped beams of urban rail transit mainly focuses on static performance [ 6 , 23 , 24 ] and dynamic performance [ 25 , 26 , 27 ]. The research on fatigue behavior and corrosion-fatigue life prediction of U-shaped beams is still insufficient.…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Fatigue Life Prediction of the U-Shaped Beam in Urban Rail Transit under a Chloride Attack Environment

et al. 2022

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The coupled effect of the chloride attack environment and train load seriously affects the safety and durability of urban rail transit viaducts and dramatically reduces their service life. In this research, a corrosion-fatigue life prediction model of the prestressed concrete (PC) beam under the coupled effect of the chloride attack environment and train load was developed. This proposed model was illustrated by a 30 m-span PC U-shaped beam in an urban rail transit viaduct. The competitive relationship between concrete fatigue cracking time, non-prestressed reinforcement corrosion initiation time, and concrete corrosion-induced cracking time was discussed. The effects of train frequency, the chloride attack environment grade, and the environmental temperature and relative humidity were investigated on corrosion-fatigue life. Results indicate that train frequency, the chloride attack environment grade, and the environmental temperature can reduce the corrosion-fatigue life of a U-shaped beam by up to 30.0%, 50.7%, and 21.5%, respectively. A coupled chloride attack environment and train frequency can reduce the corrosion-fatigue life by up to 61.2%. Distinct from the environmental temperature, the change of relative humidity has little effect on the corrosion-fatigue life of the U-shaped beam.

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“…U-shaped thin-walled concrete girders are composed of two webs and a bottom slab, with trains travelling through inside [1][2][3][4]. Comparing with traditional girders like box girders, U-shaped thin-walled girders have some advantages such as lower construction elevation (since trains travel inside), easier power system layout (since there is enough space inside for the power system), and attractive appearance.…”

Section: Introductionmentioning

confidence: 99%

“…(3) and(4) are visualized inFigure 2. It can be seen that, for both xed-xed supported and simply supported cases, with the increase of c, warping moment M ω and circulatory torque T c have the upper limit values of 0.5 Tk and 0.5 T, respectively.…”

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confidence: 99%

Parametric Study on Mixed Torsional Behavior of U‐Shaped Thin‐Walled RC Girders

Diao

Guo

et al. 2018

Advances in Civil Engineering

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Nowadays, U-shaped thin-walled concrete girders have been widely applied in the urban construction of rail viaducts in China as well as worldwide. However, the mixed torsional behaviors of these structures are not well understood. In this paper, the mixed torsional behaviors of the U-shaped thin-walled RC girders are theoretically analyzed, and a method predicting failure modes and ultimate torques is proposed. Nonlinear FE models based on ABAQUS to simulate the mixed torsional behaviors are built and calibrated with the test results. Parametric studies considering three crucial parameters (boundary condition, span length-section height ratio, and ratio of longitudinal bars to stirrups) are conducted based on both the above suggested calculating method and the FE modeling. The calculated and the simulated results agree well with each other and with the test results. It is found that the failure modes of the U-shaped thin-walled RC girders under torsion are influenced by all the three parameters. Three kinds of failure modes are observed: flexural failures dominated by warping moment, shear failures caused by warping torque and circulatory torque, and flexural-shear failures in the cases where flexural failure and shear failure appear almost at the same time.

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Experimental and Analytical Studies of U-Shaped Thin-Walled RC Beams Under Combined Actions of Torsion, Flexure and Shear

Cited by 13 publications

References 22 publications

Tests on reinforced concrete U-shaped walls subjected to torsion and flexure

Tests on reinforced concrete U-shaped walls subjected to torsion and flexure

Corrosion-Fatigue Life Prediction of the U-Shaped Beam in Urban Rail Transit under a Chloride Attack Environment

Parametric Study on Mixed Torsional Behavior of U‐Shaped Thin‐Walled RC Girders

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