Seismic reliability of reinforced concrete bridges subject to environmental deterioration and strengthened with FRCM composites

Zanini, Mariano Angelo; Toska, Klajdi; Faleschini, Flora; Pellegrino, Carlo

doi:10.1016/j.soildyn.2020.106224

Cited by 34 publications

(9 citation statements)

References 53 publications

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“…Realizing the adverse effect of corrosion on the seismic performance of RC components, some researchers assessed the seismic reliability of corroded bridge piers [ 27 , 31 , 32 ]. However, the method of obtaining the moment resistance of bridge piers with time-dependent M–N interaction diagrams and determining the seismic demand with acceleration response spectrum is seldomly used.…”

Section: Previous Research Into Time-dependent Seismic Reliability Of...mentioning

confidence: 99%

“…Asghshahr [ 31 ] conducted a sampling-based seismic reliability analysis of a corroded reinforced concrete bridge pier and found that seismic input is the most sensitive parameter on the reliability of the corroded bridge bent. Zanini et al [ 32 ] established the relationship between the time-dependent reliability of the corroded pier and the number of FRCM layers, providing a way to ensure an adequate seismic performance level of aging bridge structures by using composite materials.…”

Section: Introductionmentioning

confidence: 99%

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Time-Dependent Seismic Reliability of Coastal Bridge Piers Subjected to Nonuniform Corrosion

Yuan

Wang

et al. 2023

Materials

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Coastal bridge piers suffer random performance deterioration owing to the presence of complex nonuniform corrosion characteristics and material uncertainties. Some of these piers will also be threatened by random earthquakes during a long-term service period, and therefore, structural safety needs to be probabilistically assessed by the seismic reliability method. To deal with this problem, we present a method to calculate the time-dependent reliability of the coastal bridge pier, comprehensively considering the randomness of a seismic event, nonuniform corrosion, and material uncertainty. First, the time-dependent M–N interaction diagrams are established by using the Monte Carlo simulation method. On the basis of the interaction diagrams, the moment resistance reduction function and time-dependent moment resistance distribution are determined. Subsequently, the moment demand under the seismic load is determined using the Poisson model and the response acceleration spectrum. Then, the formulas to calculate the time-dependent reliability of a nonuniform corroded pier are derived on the basis of the theorem of total probability. The proposed method is illustrated with a case study of a coastal bridge pier. It was found that the increase in corrosion damage would obviously increase time-dependent reliability. Furthermore, the increase in submerged zone height delayed the year when the failure section shifts from the pier bottom to the bottom of the splash and tidal zone, and it reduces the failure probability of the coastal pier. The research results presented herein show that the nonuniform corrosion manifestations influence the failure mode–related time-dependent seismic reliability of the coastal bridge pier.

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Section: Previous Research Into Time-dependent Seismic Reliability Of...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Time-Dependent Seismic Reliability of Coastal Bridge Piers Subjected to Nonuniform Corrosion

Yuan

Wang

et al. 2023

Materials

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“…Condition states into probabilistic terms. Different methods have been recently developed to use the information from visual inspections in evaluating the service life of existing bridges such as [11], [12]. For the present work, condition states will be translated into probabilistic terms assuming that the condition states are linear over time and deterioration intensity values are normally distributed.…”

Section: Visual Inspectionsmentioning

confidence: 99%

Reliability-Based Bayesian Updating Using Visual Inspections of Existing Bridges

Arango

Santamaría

Sousa

et al. 2021

Lecture Notes in Civil Engineering

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Structural reliability has become a widely accepted performance indicator for infrastructures over the past decade, providing valuable information about their structural condition. As a result, it has been assessed in combination with deterioration prediction, aiming at defining optimal maintenance, and rehabilitation strategies for bridge networks. In that case, reliability values need to be updated based on collected data. To this purpose, there has been a rapid development of advanced bridge condition assessment techniques, both in the fields of structural health monitoring as well as on non-destructive assessment techniques. Most of the sophisticated non-destructive methods are the preferred option but sometimes are not possible. Thus, visual inspection is still the predominant bridge condition assessment technique being adopted within the majority of Bridge Management Systems (BMS). However, there is a procedural gap when incorporating information obtained from visual inspections into a reliability assessment. Therefore, this paper describes a methodology for a timedependent reliability-based condition evaluation of existing bridges. The procedure is applied to a pre-stressed reinforced concrete railway bridge located in Portugal, in which prediction of reliability levels are calculated for different periods assuming corrosion initiation, causing a reduction in the cross-section area of the steel reinforcement and residual strength reduction, based on onsite inspection evidence. Finally, the updating is made through a Bayesian approach to compute the posterior bridge reliability based on inspection results. This approach may apply to other types of structures considering information obtained from visual inspection concerning the actual deterioration state in a quantitative way.

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“…Recent analytical works are also found in the literature. A numerical investigation of the effectiveness of fabric-reinforced cementious matrix (FRCM) systems in the seismic retrofitting of an existing, multi-span, simply supported RC bridge subject to aging was made by Zanini et al [24]. Braga et al [25] proposed a plain strain analytical model, based on the elasticity theory, to determine the confining pressure of transverse reinforcement on the concrete core of RC members.…”

Section: Introductionmentioning

confidence: 99%

Seismic Performance Enhancement of RC Columns Using Thin High-Strength RC Jackets and CFRP Jackets

Kalogeropoulos

Tsonos

2021

Fibers

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The existing non-ductile RC structures built prior to the 1960s–1970s were mainly conceived to carry only vertical loads. As a result, the columns of these structures demonstrate poor overall hysteresis behavior during strong earthquakes, dominated by brittle shear or/and premature excessive slipping of the inadequately lap-spliced reinforcement. In the present study, the effectiveness of two different strengthening systems (including either the wrapping of the columns by carbon-fiber-reinforced polymer textile or the use of thin high-strength reinforced concrete jackets), was experimentally and analytically investigated. The main variables examined were the strengthening material, the length of the lap splices and the amount of confinement provided by the jackets. Three cantilever column specimens were constructed without incorporating modern design code requirements for preserving seismic safety and structural integrity. Subsequently, the specimens were strengthened and subjected to earthquake-type loading. Their hysteresis performances were compared, while also evaluated with respect to the response of two similar original specimens and the behavior of a control one with continuous reinforcement, tested in a previous study. The predictions of the proposed analytical formulation for the hysteresis behavior of the strengthened specimens were satisfactorily verified by the experimental results.

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Seismic reliability of reinforced concrete bridges subject to environmental deterioration and strengthened with FRCM composites

Cited by 34 publications

References 53 publications

Time-Dependent Seismic Reliability of Coastal Bridge Piers Subjected to Nonuniform Corrosion

Time-Dependent Seismic Reliability of Coastal Bridge Piers Subjected to Nonuniform Corrosion

Reliability-Based Bayesian Updating Using Visual Inspections of Existing Bridges

Seismic Performance Enhancement of RC Columns Using Thin High-Strength RC Jackets and CFRP Jackets

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