Experimental and analytical investigation on flexural behaviors of cast-in-place concrete-filled flexible composite tube beams

Ran, Jinlin; Li, Tingchun; Shang, Liming; Jiang, Hua; Li, Weiteng; Zhang, Shilin

doi:10.1016/j.conbuildmat.2022.127202

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…As depicted in Figure 12a, the energy absorption (EA) capacity of the TRCC subjected to bending was evaluated as the area under the flexural load-deflection curve. 51 The absorbed energy at a specified deflection (i.e., flexural toughness) was assessed at the cracking point (T δ ) and peak point (T p ) corresponding to the deflections of δ and δ p , where δ and δ p are the deflections at the cracking load and peak load, respectively. 35,52 In addition, the toughness index at the peak load, 52 was assessed using the ratio of the toughness value at the peak load to the toughness at the first cracking point.…”

Section: Results Of Flexural Tests and Discussionmentioning

confidence: 99%

Experimental investigation on flexural and direct shear behaviors of specimens made of lightweight carbon textile‐reinforced cementitious composites

Dinh

Pham

Kim

et al. 2023

Structural Concrete

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Textile‐reinforced cementitious composites (TRCCs) have recently received significant attention in structural engineering as promising retrofitting materials as well as reinforcements for thin and slender structural components. For applicability in the precast industry, the weight of the structural components made of TRCCs is a major concern. In this study, lightweight (LW) TRCC materials were developed and their flexural and direct shear performances were investigated. Carbon fabric is used as the textile reinforcement of the LW TRCCs, and expanded glass aggregates made from industrial refractory materials with fine particle sizes of 0.25–0.5 mm incorporating the mineral admixture (silica fume) are used to develop the LW cement‐based matrix. The main test series in this study include the expanded glass‐to‐binder (EG/B) ratio, surface coating methods used for textile fabrics, and volume dosages of short polyvinyl alcohol (PVA) fibers used to modify the cement‐based matrix. Three main series, including a total of 30 flexural test specimens and 30 shear test specimens, are fabricated and tested. The flexural behavior of LW TRCCs is investigated via four‐point bending tests and the direct shear behavior of LW TRCCs is investigated based on the FIP standard using one shear failure plane. The experimental results indicate that the EG/B ratio significantly affects the overall flexural and shear performances of LW TRCCs, wherein the use of higher EG/B ratios might lead to greater reduction in flexural properties as well as shear properties in the pre‐peak stage. The coating methods employed for fabric surface treatment via epoxy impregnation combined with rough layers are effective in enhancing flexural properties in terms of load and deformation capacity and shear properties in terms of peak stress compared with the counterpart using only the epoxy coating method. Additionally, incorporating short discrete PVA fibers within the LW cement‐based matrix results in outstanding performance due to improvement in bonding quality at the textile/matrix interface, which can be applied as a potential solution for fabricating LW, high‐performance TRCCs.

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Section: Results Of Flexural Tests and Discussionmentioning

confidence: 99%

Experimental investigation on flexural and direct shear behaviors of specimens made of lightweight carbon textile‐reinforced cementitious composites

Dinh

Pham

Kim

et al. 2023

Structural Concrete

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Behavior and design of circular concrete columns strengthened with textile-reinforced mortar subjected to eccentric compression

Ran

Wang

et al. 2023

Structures

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Flexural Behavior Characteristics of Steel Tubes Filled with SFRCCs Incorporating Recycled Materials

et al. 2023

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This study deals with the effect of fly ash and recycled sand on the flexural behavior of SFRCCs (steel fiber-reinforced cementitious composites)-filled steel tubes. As a result of the compressive test, the elastic modulus was reduced by the addition of micro steel fiber, and the fly ash and recycled sand replacement decreased the elastic modulus and increased the Poisson’s ratio. As a result of the bending and direct tensile tests, strength enhancement by the incorporation of micro steel fibers was observed, and a smooth descending curve was confirmed after initial cracking. As a result of the flexural test on the FRCC-filled steel tube, the peak load of all specimens was similar, and the applicability of the equation presented by AISC was high. The deformation capacity of the steel tube filled with SFRCCs was slightly improved. As the elastic modulus of the FRCC material lowered and the Poisson’s ratio increased, the denting depth of the test specimen deepened. This is believed to be due to the large deformation of the cementitious composite material under local pressure due to the low elastic modulus. From the results of the deformation capacities of the FRCC-filled steel tubes, it was confirmed that the contribution of indentation to the energy dissipation capacity of steel tubes filled with SFRCCs was high. From the comparison of the strain values of the steel tubes, in the steel tube filled with SFRCC incorporating recycled materials, the damage was properly distributed between the loading point and both ends through crack dispersion, and consequently, rapid curvature changes did not occur at both ends.

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Experimental and analytical investigation on flexural behaviors of cast-in-place concrete-filled flexible composite tube beams

Cited by 3 publications

References 33 publications

Experimental investigation on flexural and direct shear behaviors of specimens made of lightweight carbon textile‐reinforced cementitious composites

Experimental investigation on flexural and direct shear behaviors of specimens made of lightweight carbon textile‐reinforced cementitious composites

Behavior and design of circular concrete columns strengthened with textile-reinforced mortar subjected to eccentric compression

Flexural Behavior Characteristics of Steel Tubes Filled with SFRCCs Incorporating Recycled Materials

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