Corrosion-induced cracking fragility of RC bridge with improved concrete carbonation and steel reinforcement corrosion models

Sun, Bo; Xiao, Rucheng; Ruan, Weidong; Wang, Pengbo

doi:10.1016/j.engstruct.2020.110313

Cited by 31 publications

(17 citation statements)

References 27 publications

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“…In addition, the concrete bridges are mainly focused herein due to the more prominent challenge of durability embedded in this structural type (Kušter Marić et al, 2020; Memon et al, 2019; Sun et al, 2020). For a planned route to be passed by CTV, the passage request can be authorized only when the following equation is satisfied:…”

Section: Serviceability Based Permit Checking Methodsmentioning

confidence: 99%

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Yuan

Han

et al. 2020

Advances in Structural Engineering

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To increase the authorization efficiency of overloaded customized transport vehicle (CTV), a serviceability limit state (SLS) reliability based permit checking method for concrete bridges is proposed through the optimization towards critical load effect ratio. In this procedure, the SLS reliability of crack width and the SLS reliability of concrete stress in tensile region are analyzed for reinforced concrete (RC) and prestressed concrete (PC) structures, respectively. The durability requirements and a unified reliable level can be concentrated reflected by the optimized critical load effect ratio. The results show that it is unreasonable to take a uniform target reliability index for all routes in permit checking of CTV, a stricter authorization criterion should be adopted for a higher expected authorization frequency. For a specific route level, a fluctuant variation of critical load effect ratio can be found with the increasing of bridge span. By introducing an ultimate limit state (ULS) based safety checking procedure, it is found that the SLS based permit checking criterion is crucial and determinative for the authorization of CTV instead of the ULS.

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Section: Serviceability Based Permit Checking Methodsmentioning

confidence: 99%

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Yuan

Han

et al. 2020

Advances in Structural Engineering

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“…The maintenance cycle is shown in Table 3. The existing carbonization models are basically divided into four categories: theoretical models [59], empirical models [60], semi-theoretical and semi-empirical models [61], and random models [62].…”

Section: Operation and Maintenancementioning

confidence: 99%

Life Cycle Assessment of Bridges Using Bayesian Networks and Fuzzy Mathematics

et al. 2021

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At present, reducing the impact of the construction industry on the environment is the key to achieving sustainable development. Countries all over the world are using software systems for bridge environmental impact assessment. However, due to the complexity and discreteness of environmental factors in the construction industry, they are difficult to update and determine quickly, and there is a phenomenon of data missing in the database. Most of the lost data are optimized by Monte Carlo simulation, which greatly reduces the reliability and accuracy of the research results. This paper uses Bayesian advanced fuzzy mathematics theory to solve this problem. In the research, a Bayesian fuzzy mathematics evaluation and a multi-level sensitivity priority discrimination model are established, and the weights and membership degrees of influencing factors were defined to achieve comprehensive coverage of influencing factors. With the support of theoretical modelling, software analysis and fuzzy mathematics theory are used to comprehensively evaluate all the influencing factors of the five influencing stages in the entire life cycle of the bridge structure. The results show that the material manufacturing, maintenance, and operation of the bridge still produce environmental pollution; the main source of the emissions exceeds 53% of the total emissions. The effective impact factor reaches 3.01. At the end of the article, a big data sensitivity model was established. Through big data innovation and optimization analysis, traffic pollution emissions were reduced by 330 tonnes. Modeling of the comprehensive research model; application; clearly confirms the effectiveness and practicality of the Bayesian network fuzzy number comprehensive evaluation model in dealing with uncertain factors in the evaluation of the sustainable development of the construction industry. The research results have made important contributions to the realization of the sustainable development goals of the construction industry.

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“…The approach of probabilistic analysis for the formation of cracks caused by corrosion, formed on the basis of improved models of wear, is given in work [31]. The results show that increasing the strength of concrete, the depth of the protective layer, and the diameter of the steel bars, or reducing the density of CO 2 are effective countermeasures in order to increase the durability of the reinforced concrete bridge [31]. However, the cited work does not sufficiently reveal how those parameters change during the lifetime of the structure and how it affects its strength.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Development methodology of determinating residual carrying capacity of reinforced concrete beams with damages tensile reinforcement which occurred during loading

Vegera

Vashkevych

Blikharskyy

et al. 2021

EEJET

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This paper reports the improved and verified procedure for calculating reinforced concrete beams affected by damage to stretched reinforcement when loaded. The main results from testing the reinforced concrete beams with damage in the stretched zone in the form of one hole in the reinforcement in the middle of the beam are given. The variable parameter of the study was the level of load resulting in the damage. It acquired values of 0, 30 %, 50 %, 70 % of the bearing capacity of control undamaged samples. Overall, the results of testing 12 samples are given. A new procedure has been proposed for taking into consideration changes in the mechanical characteristics of stretched reinforcement arising from its damage. This makes it possible to more accurately establish the bearing capacity of reinforced concrete bended elements affected by damage to their reinforcement during operation. The analysis of the calculation, compared with experimental quantities, led to a conclusion that the strain model could determine when the bearing capacity of reinforced concrete beams without damage and with damage to working reinforcement is exhausted. Based on the improved algorithm, the principle of using a strain model was proposed to establish when the bearing capacity of damaged samples, taking into consideration the effect of the load level, is exhausted. The theoretical estimation, considering when the bearing capacity is exhausted, showed results that are 3...21 % less than the experimental values, which ensures reliability of calculation of such structures. The proposed calculation provides a new approach to determining the bearing capacity of reinforced concrete beams damaged during operation. That, in turn, makes it possible to more accurately determine the residual bearing capacity of structures and increases the safety of their operation.

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Corrosion-induced cracking fragility of RC bridge with improved concrete carbonation and steel reinforcement corrosion models

Cited by 31 publications

References 27 publications

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Permit checking of overloaded customized transport vehicle based on serviceability limit state reliability of concrete bridges

Life Cycle Assessment of Bridges Using Bayesian Networks and Fuzzy Mathematics

Development methodology of determinating residual carrying capacity of reinforced concrete beams with damages tensile reinforcement which occurred during loading

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