Service Life Prediction of Precast Concrete Structures Exposed to Chloride Environment

Zhang, Dawei; Zeng, Yu; Fang, Mingshan; Jin, Weiliang

doi:10.1155/2019/3216328

Cited by 15 publications

(10 citation statements)

References 71 publications

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“…The flowchart of the proposed model is shown in Figure 13. The validity and accuracy of the model had been proved by comparing the existing test data and models (Xin et al, 2019;Zhang et al, 2019).…”

Section: Prediction Model Of Bearing Capacity For Corroded Reinforced...mentioning

confidence: 99%

Experimental Study on Bearing Capacity of Corroded Reinforced Concrete Arch Considering Material Degradation

et al. 2022

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To study the bearing capacity of a corroded reinforced concrete (RC) arch and analyze the deterioration mechanism of an in-service RC arch bridge, a deterioration simulation under the coupling effect of the environment and load was performed by employing non-immersion energization, and considering the dead load on the arch, single point loading tests of the arch models were carried out; the crack development, structural deformation, and ultimate bearing capacity of a corroded RC arch under service stress were studied; the failure mode of the corroded arch was explored; and a bearing capacity prediction model considering dual deterioration effects of reinforcement corrosion deterioration and arch axis deterioration was established. Results indicated that the spacing of cracks caused by a load on the non-corroded arch was more uniform, and the number and distribution range of load-induced cracks in the corroded arch was smaller, while the maximum crack width was larger. Corrosion significantly reduced the strength of the arch rib; for the deteriorated arch with a corrosion rate of 7.62%, the cracking load and the bearing capacity decreased by 28.57 and 9.84%, respectively. Corrosion weakened structural stiffness, while it does not convert the failure mode of the arch. Only considering section resistance degradation may underestimate the damaging effects of corrosion on the arch structure.

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Section: Prediction Model Of Bearing Capacity For Corroded Reinforced...mentioning

confidence: 99%

Experimental Study on Bearing Capacity of Corroded Reinforced Concrete Arch Considering Material Degradation

et al. 2022

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“…[13][14][15][16][17][18][19][20][21][22] In addition, a couple of researchers have examined reliability analysis of RC structures under induced defects, corrosion, or their combinations. [23][24][25][26][27][28][29][30][31] Further, a similar methodology was successfully used in the case of creep and shrinkage in a few studies. [32][33][34][35][36][37][38] Due to limited and inadequate research on the combined effect of creep, cracking, shrinkage and temperature, in order to determine the safety of RC beams, this research aims to incorporate these effects in a numerical and experimental framework.…”

Section: Introductionmentioning

confidence: 99%

Reliability of reinforced concrete beams in serviceability limit state via microprestress-solidification theory, a structural health monitoring strategy

Ghabdian

Aval

Noori

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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An important and critical area within the broad domain of structural health monitoring, as related to reinforced civil and mechanical structures, is the assessment of creep, shrinkage, and high-temperature effects on reliability and serviceability. Unfortunately, the monitoring and impact of these inherent mechanical characteristics and behaviors, and subsequent impact on serviceability, have rarely been considered in the literature in structural health monitoring. In this paper, the microprestress-solidification creep theory for beams is generalized for the simultaneous effect of linear/nonlinear creep, shrinkage, and high temperature in a reliability framework. This study conducts a systematic time-dependent procedure for the reliability analysis of structures using a powerful nanoscale method. It must be noted that this paper aims to extend the previously developed microprestress-solidification method in a health monitoring reliability-based framework with a close look at a nonlinear creep, parameters affecting creep, and long-time high temperature. A finite element approach is proposed where creep, shrinkage, temperature, and cracking are considered using strain splitting theory. First, the model performance was evaluated by comparing the results with the experimental test available in the literature in the case of creep and shrinkage. Then, the simultaneous effect of creep, shrinkage, and temperature was compared with experimental results obtained by the authors. Reliability analysis was applied to reinforced concrete beams subjected to sustained gravity loading and uniform temperature history in order to calculate exceedance probability in the serviceability limit state. It was found that the exceedance probability of reinforced concrete beams was dependent on the shear span-to-depth ratio. In the serviceability limit state, exceedance probabilities of 0.012 and 0.157 were calculated for the span-to-depth ratios of 1 and 5, respectively. In addition, it was shown that temperature plays an important role in the reliability of reinforced concrete beams. A 4.27-fold increase was observed in the case of moderate to high temperature. Finally, for three different load levels of 40%, 70%, and 80%, the exceedance probabilities were 0.156, 0.328, and 0.527, respectively, suggesting that load level is another key parameter affecting the reliability of reinforced concrete beams. It is thus concluded these fundamental phenomenological studies should be further considered as part of the broad field of structural health monitoring.

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“…Seawater and sea sand contain chloride ions. These ions speed up corrosion development and negatively affect the long performance of concrete structures [25][26][27][28][29]. The corrosion of steel bars causes the cracking, staining, and 2 of 20 spalling of concrete cover [26,30].…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review of the Effects of Different Simulated Environmental Conditions and Hybridization Processes on the Mechanical Behavior of Different FRP Bars

et al. 2022

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When it comes to sustainability, steel rebar corrosion has always been a big issue, especially when they are exposed to harsh environmental conditions, such as marine and coastal environments. Moreover, the steel industry is to blame for being one of the largest producers of carbon in the world. To supplant this material, utilizing fiber-reinforced polymer (FRP) and hybrid FRP bars as a reinforcement in concrete elements is proposed because of their appropriate mechanical behavior, such as their durability, high tensile strength, high-temperature resistance, and lightweight-to-strength ratio. This method not only improves the long performance of reinforced concrete (RC) elements but also plays an important role in achieving sustainability, thus reducing the maintenance costs of concrete structures. On the other hand, FRP bars do not show ductility under tensile force. This negative aspect of FRP bars causes a sudden failure in RC structures, acting as a stumbling block to the widespread use of these bars in RC elements. This research, at first, discusses the effects of different environmental solutions, such as alkaline, seawater, acid, salt, and tap water on the tensile and bonding behavior of different fiber-reinforced polymer (FRP) bars, ranging from glass fiber-reinforced polymer (GFRP) bars, and basalt fiber-reinforced polymer (BFRP) bars, to carbon fiber-reinforced polymer (CFRP) bars, and aramid fiber-reinforced polymer (AFRP) bars. Furthermore, the influence of the hybridization process on the ductility, tensile, and elastic modulus of FRP bars is explored. The study showed that the hybridization process improves the tensile strength of FRP bars by up to 224% and decreases their elastic modulus by up to 73%. Finally, future directions on FRP and hybrid FRP bars are recommended.

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Service Life Prediction of Precast Concrete Structures Exposed to Chloride Environment

Cited by 15 publications

References 71 publications

Experimental Study on Bearing Capacity of Corroded Reinforced Concrete Arch Considering Material Degradation

Experimental Study on Bearing Capacity of Corroded Reinforced Concrete Arch Considering Material Degradation

Reliability of reinforced concrete beams in serviceability limit state via microprestress-solidification theory, a structural health monitoring strategy

A Comprehensive Review of the Effects of Different Simulated Environmental Conditions and Hybridization Processes on the Mechanical Behavior of Different FRP Bars

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