Effect of eccentricity on retrofitting efficiency of basalt textile reinforced concrete on partially damaged masonry columns

Wang, Jiyang; Wan, Chenglin; Zeng, Qiang; Shen, Linghua; Malik, Muhammad Akbar; Yan, Dongming

doi:10.1016/j.compstruct.2019.111585

Cited by 28 publications

(8 citation statements)

References 74 publications

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“…Studies have demonstrated that a 0.5% HPMC content can substantially improve the plastic viscosity and water retention of cement mortar [16]. Based on the proportion of TRC cement mortar matrix obtained from previous studies [17,18], the light aggregate concrete matrix proportion and experimental groups for this experiment are detailed in Table 1 and Table 2, respectively. Six specimens were prepared for each experimental group.…”

Section: Specimen Designmentioning

confidence: 99%

Effect of Textile Layers and Hydroxypropyl Methylcellulose on Flexural Behavior of TRLC Thin Plates

Wang,

Yu,

Zeng

et al. 2024

Buildings

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To examine the flexural toughness characteristics of textile-reinforced lightweight aggregate concrete (TRLC), a four-point bending test was conducted to assess the impact of varying numbers of textile layers and the inclusion of hydroxypropyl methylcellulose on the ultimate load-bearing capacity and deformation capacity of TRLC thin plates. Six groups of specimens were prepared for the experiment, and the bending capacity of the thin plates in each group was evaluated. The flexural toughness index was utilized to quantify the bending performance of TRLC thin plates. The findings revealed that increasing the number of textile layers improved the initial cracking load, initial cracking deflection, ultimate load, ductility, and flexural toughness of the thin plates. For the specimens without HPMC, the initial cracking load was increased by up to 36.1%, the ultimate load by up to 40.9%, and the flexural toughness index by up to 292% as the number of textile layers was increased. For specimens doped with HPMC, the initial cracking load was increased by up to 61.7%, the ultimate load by up to 246.7%, and the flexural toughness index by up to 65%. The TRLC thin plate containing hydroxypropyl methylcellulose exhibited a reduced initial cracking load yet displayed a stronger matrix consistency and good flexural toughness. Moreover, the enhancement in the ultimate load of TRLC thin plates with hydroxypropyl methylcellulose was more pronounced with an increased number of textile layers, resulting in a significantly higher number of cracks compared to TRLC without hydroxypropyl methylcellulose and an 11.40-fold increase in the flexural toughness index.

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Section: Specimen Designmentioning

confidence: 99%

Effect of Textile Layers and Hydroxypropyl Methylcellulose on Flexural Behavior of TRLC Thin Plates

Wang,

Yu,

Zeng

et al. 2024

Buildings

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“…e maximum torsion was directly read from its torsionrotation angle curve, and the maximum value indicates the torsional bearing capacity of the pier column. As shown in Figure 15 [42], the yield rotation angle (θ y ) was determined when the area enclosed by the torsion-rotation angle curve is equal to that surrounded by bilinear curve when rotation angle ranges from 0 to θ u [43]. For the convenience of explanation, we use T max to indicate the maximum torque of positive load and −T max to indicate the maximum torque of negative load.…”

Section: Crack Patterns and Lateral Torsion-rotation Anglementioning

confidence: 99%

Seismic Behavior of RC Bridge Piers Locally Replaced with SFRC‐FA Subjected to Torsion Combined with Axial Compression

Wang

Wan

et al. 2021

Advances in Materials Science and Engineering

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Under complex seismic forces, the failure characteristics of the plastic hinge region at the bottom of the pier column and the methods improving the ductility have attracted extensive attention. In this study, steel fiber-reinforced concrete with fine aggregate (SFRC-FA) was applied to locally replace the conventional concrete in the potential plastic hinge region at the bottom of the pier column. Five SFRC-FA pier column specimens with different stirrup ratios and different replacement lengths and one conventional reinforced concrete pier column specimen were produced. Using the seismic behavior tests under the combined bending-shear-torsion-axial force, the failure mode, torsional bearing capacity, energy dissipation, and the torsional plastic hinges of the pier columns were investigated. In addition, an equation for calculating the torsional bearing capacity of the new composite pier columns was proposed. The results showed that (1) compared with the reinforced concrete pier column, the plastic hinge was shifted from the bottom of the pier column to the middle of the height of the pier column due to the application of SFRC-FA at the bottom of the pier column, which improved the torsional bearing capacity; (2) the effect of reducing the stirrup ratio of the SFRC-FA replacement region on the torsional bearing capacity, cracking mode, energy dissipation, and ductility was not obvious; (3) the accuracy of the new equation based on the space truss model proposed in this article was verified by comparison with the experiments of this study and other researches.

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“…The available literature indicated that the commonly used external confinement for masonry structures were fiber reinforced polymer (FRP) jackets (Witzany et al, 2014;Youssf et al, 2017;Alotaibi and Galal, 2018;El-Sokkary and Galal, 2019;Zou et al, 2023a), textile reinforced concrete (TRC) jackets (Wang et al, 2020;Li et al, 2021a;Jing et al, 2021), high ductile concrete (HDC) jackets (Deng and Li, 2020;Li et al, 2021b;Li et al, 2022), fabric reinforced cementitious matrix (FRCM) jackets (Fossetti and Minafò, 2017;Murgo and Mazzotti, 2019;Angiolilli et al, 2020). These strengthening techniques have been demonstrated to be effective in the field of retrofitting or strengthening masonry structures.…”

Section: Introductionmentioning

confidence: 99%

Mechanical response of masonry structure strengthened with ultra-high performance concrete (UHPC): a comparative analysis for different strengthening tactics

Jiang,

Yang,

2023

Front. Mater.

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Rehabilitation and strengthening of existing masonry structures can improve their safety, prolong life and save economic costs. In this study, a total of eighteen masonry column specimens strengthened by ultra-high performance concrete (UHPC) were fabricated and tested in compression. The effects of strengthening method, strengthening thickness and loading eccentricity were investigated. The failure mode, bearing capacity, strain, ductility, and energy dissipation were discussed in before and after strengthening to evaluate the UHPC strengthening effectiveness. A three-dimensional numerical model established using finite element analysis (FEA) was validated with the experimental results. Results indicated that the brittle failure of masonry columns in compression could be significantly avoided using UHPC strengthening. Among three methods of strengthening, hoop strengthening was the most effective in increasing the ultimate load, ductility, and dissipated energy of masonry columns by 185.81%, 49.09%, and 297.12%, respectively. With the strengthening thickness increased from 0 to 20 and 30 mm, the ultimate bearing capacity of masonry columns was respectively increased by 29.17% and 117.26%, while the corresponding lateral displacement was decreased by 32.44% and 37.24%, respectively. The horizontal buckling of masonry columns can be relieved by UHPC, and the increase in eccentricity did not weaken the contribution of UHPC in strengthened masonry columns. The numerical results were in good agreement with the test results, with errors below 7.6%.

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Effect of eccentricity on retrofitting efficiency of basalt textile reinforced concrete on partially damaged masonry columns

Cited by 28 publications

References 74 publications

Effect of Textile Layers and Hydroxypropyl Methylcellulose on Flexural Behavior of TRLC Thin Plates

Effect of Textile Layers and Hydroxypropyl Methylcellulose on Flexural Behavior of TRLC Thin Plates

Seismic Behavior of RC Bridge Piers Locally Replaced with SFRC‐FA Subjected to Torsion Combined with Axial Compression

Mechanical response of masonry structure strengthened with ultra-high performance concrete (UHPC): a comparative analysis for different strengthening tactics

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