Seismic performance of reinforced concrete beams under freeze-thaw cycles

Rong, Xian‒Liang; Zhang, Yixin; Zheng, Shansuo; Wang, Junyan; Li, Dong; Dai, Kuang-Yu

doi:10.1016/j.jobe.2021.103979

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…The distribution of coarse aggregate inside concrete material satisfies the Fuller grading curve, which could effectively describe the compactness and macroscopic mechanical properties of concrete material [34]. The expression of the Fuller grading curve is shown in Equation (15):…”

Section: Heterogeneity Of Concrete After Seawater Freeze-thaw Cyclesmentioning

confidence: 99%

“…Experimental studies of RC piers with different design parameters after freeze-thaw cycles have been carried out. The seismic performance of RC piers after freeze-thaw cycles was studied by Xu et al [14,15] using a low cyclic loading test, and the failure modes, hysteretic curves, bearing capacity, displacement ductility coefficient, stiffness degradation, and energy dissipation capacity of RC piers under different freezethaw cycles and axial compression ratios were compared and analyzed. The freezing and thawing processes of the specimens were completed in the air to simulate the freeze-thaw cycles that occurred in steam and rain environments, and the spray solution was freshwater.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Simulation of Reinforced Concrete Piers after Seawater Freeze–Thaw Cycles

et al. 2022

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The reinforced concrete (RC) piers of offshore bridges inevitably experience seawater freeze–thaw cycles due to the periodic movement of tides in cold climates. The damage caused by seawater freeze–thaw cycles will reduce the durability and mechanical properties of concrete, and then affect the seismic performance of RC piers. The method of seismic performance analysis on RC piers by numerical simulation is gradually emerging because the process of the conventional experiment is relatively complicated, and the heterogeneity and degradation of concrete after seawater freeze–thaw cycles should be considered. In this study, the method of meso-element equivalent and layered modeling was used to simulate a low cyclic loading test on an RC pier after seawater freeze–thaw cycles with ABAQUS software. The numerical simulation results were compared with the experimental results; the deviation value of peak load was not more than 6%, and the deviation value of peak displacement was not more than 10%. The result of the numerical simulation matched well with the experimental results, and the influence of different parameters was analyzed through the practical method of numerical simulation. It can be determined that the peak load decreased by 11%, while the peak displacement increased by 40% after 125 seawater freeze–thaw cycles. In the same 125 freeze–thaw cycles, the peak load increased by 15% and 27% while the axial compression ratio and the longitudinal reinforcement diameter increased. As the stirrup spacing of specimens decreased, the peak load remained unchanged, but the ductility coefficient of the specimens increased by 20%.

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Section: Heterogeneity Of Concrete After Seawater Freeze-thaw Cyclesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Reinforced Concrete Piers after Seawater Freeze–Thaw Cycles

et al. 2022

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“…Yang et al (2022) [15] found that with the increase in freeze-thaw cycles, the ultimate bearing capacity of large eccentric RC columns decreased significantly, while the ultimate bearing capacity of small eccentric RC columns did not change much. Xu (2016) [16] and Rong (2022) [17] found that the stiffness and compressive strength attenuation rate of RC columns increased with the increase in freeze-thaw cycles.…”

Section: Introductionmentioning

confidence: 99%

Effects of Freeze–Thaw Cycles on Axial Compression Behaviors of UHPC-RC Composite Columns

Gao,

Liu

2024

Materials

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Ultra-high performance concrete (UHPC) with excellent durability has broad application prospects in improving the durability of reinforced concrete (RC) structures. To clarify the influence of freeze–thaw cycles on the axial compression performance of UHPC-RC composite columns, axial compression tests were carried out on composite columns with different cycles (0, 100, 200, 300 cycles) and stirrup spacing (35, 70, 105 mm). The results showed that the UHPC shell did not fall off when the composite column was destroyed, even in the freeze–thaw environment. Under the action of freeze–thaw cycles, the peak load Nu,t and initial elastic modulus E of the composite column decreased, but the ductility coefficient μ increased. Increasing the stirrup spacing could significantly improve the ductility of the composite column. After 100 freeze–thaw cycles, the ductility coefficient μ of the 35 mm stirrup spacing specimen was 112.6% higher than that of the 105 mm specimen. A prediction model for the bearing capacity of UHPC-RC composite columns under freeze–thaw cycles was established, and the predicted results were in good agreement with the experimental results. This study lays a theoretical and experimental foundation for the application and design of UHPC-RC composite columns in the freeze–thaw environment.

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“…Kurihashi et al (2021) conducted impact loading experiments to investigate the behavior of freeze-thaw damaged reinforced concrete (RC) beams. Rong et al (2022) tested undamaged and damaged RC beams to investigate their seismic performance and then proposed time-dependent models that could estimate the residual capacity of freeze-thaw damaged RC members. Rong et al (2023) tested RC joints damaged by freeze-thaw cycles.…”

Section: Introductionmentioning

confidence: 99%

Bond Strength of Post-installed Anchor Adhering to Damaged Concrete by Freeze-thaw Action

Yano,

Shiokoshi,

Takase

et al. 2024

ACT

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Reinforced concrete (RC) structures in cold regions are susceptible to surface deterioration due to freeze-thaw cycles (FTC). For sustainable development goals (SDGs) and a decarbonized society, damaged structures should be repaired and reinforced. Post-installed anchors are commonly used for seismic retrofitting and equipment fixation. However, research on the bond characteristics of damaged concrete is limited. Therefore, in this study, the bonding performance of adhesive anchors in damaged concrete was investigated. Liquid nitrogen was employed to subject the concrete surface to FTC; subsequently, bond-slip tests were conducted with the degree of deterioration serving as a parameter. The results suggested, the bond strength decreased as the degree of damage increased. The reduction ratios of the post-installed anchor with epoxy and cement-based resins were almost identical. Furthermore, a bond strength equation was proposed by referring to the bond-slip model between the rebar and concrete (fib 1990). The test results were well predicted with a correlation coefficient of 0.94. This study is based on previous studies (Yano et al. 2022(Yano et al. , 2023 but presents new findings.

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Seismic performance of reinforced concrete beams under freeze-thaw cycles

Cited by 12 publications

References 24 publications

Numerical Simulation of Reinforced Concrete Piers after Seawater Freeze–Thaw Cycles

Numerical Simulation of Reinforced Concrete Piers after Seawater Freeze–Thaw Cycles

Effects of Freeze–Thaw Cycles on Axial Compression Behaviors of UHPC-RC Composite Columns

Bond Strength of Post-installed Anchor Adhering to Damaged Concrete by Freeze-thaw Action

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