Experimental Study and Numerical Simulation of Seismic Behavior for RC Columns Subjected to Freeze-Thaw Cycles

Qin, Qing; Zheng, Shansuo; Li, Lei; Li, Dong; Zhang, Y.; Ding, Sha

doi:10.1155/2017/7496345

Cited by 20 publications

(19 citation statements)

References 14 publications

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“…It can be seen from Table 4 that some theoretical values are conservative compared with the test results, especially for those with higher FT cycles. The non-uniform temperature field during the freeze–thaw test induces the size effect, and the presence of transverse reinforcements limits the expansion of core concrete (Gong and Maekawa, 2018; Qin et al, 2017). The effects of these two factors became significant as the frost damage increased.…”

Section: Resultsmentioning

confidence: 99%

Eccentric compressive behavior of recycled aggregate concrete columns after freezing and thawing cycles

Yan

Liu

Zou

et al. 2018

Advances in Structural Engineering

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The eccentric compressive behavior of 18 recycled aggregate concrete columns after freezing and thawing cycles were investigated. The effect of the number of freezing and thawing cycles, the replacement ratio of recycled coarse aggregate, and the eccentricity of axial loading on the eccentric compressive behavior of columns was analyzed. The results show that the strain distribution along the depth of cross section of columns was plane during the eccentric compression test after freezing and thawing cycles. With the increase in the freezing and thawing cycles and the replacement ratio of recycled coarse aggregate, the failure modes of partial specimens turned from ductile tension failure to brittle compression failure. Two existing design methods for calculating the bearing capacity of conventional concrete columns subjected to eccentric compressive loading were verified to be effective for evaluating that of recycled aggregate concrete columns after limited freezing and thawing cycles.

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Section: Resultsmentioning

confidence: 99%

Eccentric compressive behavior of recycled aggregate concrete columns after freezing and thawing cycles

Yan

Liu

Zou

et al. 2018

Advances in Structural Engineering

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“…(3) Damage depth estimation There is little information about damage depth developed inside RC members (Petersen et al 2004;Qin et al 2017). The relations presented in Fig.…”

Section: Analysis Detailsmentioning

confidence: 99%

“…Frost damage, depending on its depth, alters RC member failure modes from flexure to shear-dominance (Hayashida et al 2014;Qin et al 2017). For shear assessment of such existing RC structural members, design equations are not necessarily appropriate (fib 2010; Su et al 2019) because of their inherent conservative character, which stems from the lower bound analysis.…”

Section: Introductionmentioning

confidence: 99%

Kinematic Model for Shear Assessment of RC Short Columns Subjected to Frost Damage

Kanazawa

Ushiwatari

2021

ACT

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Few reports have described practice-based models assessing ultimate strengths of existing reinforced concrete (RC) members subjected to frost damage. This paper presents a kinematic model for shear assessment of damaged RC short columns based on the upper bound theorem. Without regressive functions, the developed model predicts the shear strength contribution of damaged concrete when the displacement field is divided into undamaged and damaged zones based on damage depths obtained from core sampling. The model accuracy is verified by comparison of its predictions with those of earlier test results of 14 RC columns presenting shear failure after freeze-thaw exposure. The analytical predictions show good agreement with experimentally obtained results within error of 20%. Shear strength predictions for different damage depths are presented for an existing RC bridge pier with severe frost damage. Rational shear assessment was achieved because the kinematic analysis directly correlates the damage depth with shear strength reduction.

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“…In recent years, artificial climate accelerated corrosion techniques have been continuously developed and extensively employed in durability testing research of RC structures [8,[28][29][30].…”

Section: Simulated Acid Rain In the Environmental Chambermentioning

confidence: 99%

Experimental Investigation on Seismic Behaviours of Reinforced Concrete Columns under Simulated Acid Rain Environment

Zheng

Zhang

et al. 2020

Advances in Civil Engineering

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e purpose of this paper was to systematically investigate the influence of acid rain environments on the seismic behaviour of a reinforced concrete (RC) column. Six RC column specimens with shear span ratios of 2.84 were tested under low cyclic reversed loads after being subjected to accelerated corrosion tests in an artificial climate. e corrosion level and stirrup ratio were used as the control variables. e corrosion ratios of the longitudinal rebars ranged from 0 to 13.17%, and the corrosion ratios of the stirrups varied from 0 to 6.75%. e seismic behaviours of the column specimens were analysed with respect to visual damage, failure mode, hysteresis behaviour, load-carrying capacity, deformation capacity, stiffness degradation, and energy dissipation behaviour. e test results showed that the appearance characteristics of the six column specimens exhibited varying degrees of visual damage as a result of the simulated acid rain exposure. All six specimens were dominated by similar flexural-shear failures under low cyclic reversed loads, regardless of the distinctions in the corrosion levels or stirrup ratios. For the specimens with the same ratios of stirrup, as the corrosion level increased, the load-carrying capacity, deformation capacity, stiffness, and energy dissipation capacity were continuously decreased. For the specimens with the same levels of corrosion, the higher the stirrup ratio was, the stronger the restraint effect of the stirrups on the concrete, and the seismic behaviours of the specimens were obviously improved.

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Experimental Study and Numerical Simulation of Seismic Behavior for RC Columns Subjected to Freeze-Thaw Cycles

Cited by 20 publications

References 14 publications

Eccentric compressive behavior of recycled aggregate concrete columns after freezing and thawing cycles

Eccentric compressive behavior of recycled aggregate concrete columns after freezing and thawing cycles

Kinematic Model for Shear Assessment of RC Short Columns Subjected to Frost Damage

Experimental Investigation on Seismic Behaviours of Reinforced Concrete Columns under Simulated Acid Rain Environment

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