Reliability-based assessment of existing masonry arch railway bridges

Moreira, Vicente Novo; Fernandes, João; Matos, José C.; Oliveira, Daniel V.

doi:10.1016/j.conbuildmat.2016.04.030

Cited by 49 publications

(28 citation statements)

References 15 publications

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“…The normal distribution is determined for the contact friction angle and the elastic modulus of masonry following the examples in literature [30][31][32][33], while lognormal distribution is assumed for the other parameters. The distributions of the random variables and their parameters are presented in Tables 1 and 2 for the strong unit-weak bond (SU-WB) and weak unit-strong bond (WU-SB) systems, respectively.…”

Section: Statistical Representation Of the Materials Propertiesmentioning

confidence: 99%

Tensile Fracture Mechanism of Masonry Wallettes Parallel to Bed Joints: A Stochastic Discontinuum Analysis

et al. 2020

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Nonhomogeneous material characteristics of masonry lead to complex fracture mechanisms, which require substantial analysis regarding the influence of masonry constituents. In this context, this study presents a discontinuum modeling strategy, based on the discrete element method, developed to investigate the tensile fracture mechanism of masonry wallettes parallel to the bed joints considering the inherent variation in the material properties. The applied numerical approach utilizes polyhedral blocks to represent masonry and integrate the equations of motion explicitly to compute nodal velocities for each block in the system. The mechanical interaction between the adjacent blocks is computed at the active contact points, where the contact stresses are calculated and updated based on the implemented contact constitutive models. In this research, different fracture mechanisms of masonry wallettes under tension are explored developing at the unit–mortar interface and/or within the units. The contact properties are determined based on certain statistical variations. Emphasis is given to the influence of the material properties on the fracture mechanism and capacity of the masonry assemblages. The results of the analysis reveal and quantify the importance of the contact properties for unit and unit–mortar interfaces (e.g., tensile strength, cohesion, and friction coefficient) in terms of capacity and corresponding fracture mechanism for masonry wallettes.

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Section: Statistical Representation Of the Materials Propertiesmentioning

confidence: 99%

Tensile Fracture Mechanism of Masonry Wallettes Parallel to Bed Joints: A Stochastic Discontinuum Analysis

et al. 2020

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“…For the purposes of the study, an Italian railway bridge (Cevetta bridge, CN) was selected and modelled in order to compute the reliability index as a function of degradation scenarios. Information on the bridge regarding the main geometrical properties (such as span, ring thickness, rise, arch width, maximum pier height, pier top width, number of spans, number of track lines) have been directly derived from the study [6].…”

Section: Case Studymentioning

confidence: 99%

“…Since passive pressure is fully mobilized only for high deformations and displacements of sections of an arch into surrounding fill, according to [6] a reduction factor of 50% was applied to passive pressure, in order to consider this fact. In the longitudinal direction, the live load dispersion is performed according to the Boussinesq theory, with a longitudinal angle of distribution of 15°and 30°, through ballast and fill material respectively.…”

Section: Case Studymentioning

confidence: 99%

Structural Reliability of Masonry Arch Bridges Subject to Natural Aging

Borgna

Zanini

Hofer

et al. 2019

Structural Integrity

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“…Altunişik et al performed experimental measurements by ambient vibration test on an ancient masonry Bastion and extracted three first natural frequencies of the Bastion [3]. Many studies were done on the structural behavior assessment of historic monumental construction by finite element modeling and analysis [4,6,7,9,14,15,[17][18][19]22,24,25,28,29,31,35,38]. Micic et al (2015) studied the probabilistic analysis of the strength of masonry building walls over time.…”

Section: Introductionmentioning

confidence: 99%

Reliability-Based Safety Evaluation of the BISTOON Historic Masonry Arch Bridge

Pouraminian

Pourbakhshian

Farsangi

et al. 2020

Civil and Environmental Engineering Reports

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This research examines the probabilistic safety assessment of the historic BISTOON arch bridge. Probabilistic analysis based on the Load-Resistance model was performed. The evaluation of implicit functions of load and resistance was performed by the finite element method, and the Monte-Carlo approach was used for experiment simulation. The sampling method used was Latin Hypercube. Four random variables were considered including modulus of elasticity of brick and infilled materials and the specific mass of brick and infilled materials. The normal distribution was used to express the statistical properties of the random variables. The coefficient of variation was defined as 10%. Linear behavior was assumed for the bridge materials. Three output parameters of maximum bridge displacement, maximum tensile stress, and minimum compressive stress were assigned as structural limit states. A sensitivity analysis for probabilistic analysis was performed using the Spearman ranking method. The results showed that the sensitivity of output parameters to infilled density changes is high. The results also indicated that the system probability of failure is equal to p fsystem =1.55 × 10−3. The bridge safety index value obtained is βt = 2.96, which is lower than the recommended target safety index. The required safety parameters for the bridge have not been met and the bridge is at the risk of failure.

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Reliability-based assessment of existing masonry arch railway bridges

Cited by 49 publications

References 15 publications

Tensile Fracture Mechanism of Masonry Wallettes Parallel to Bed Joints: A Stochastic Discontinuum Analysis

Tensile Fracture Mechanism of Masonry Wallettes Parallel to Bed Joints: A Stochastic Discontinuum Analysis

Structural Reliability of Masonry Arch Bridges Subject to Natural Aging

Reliability-Based Safety Evaluation of the BISTOON Historic Masonry Arch Bridge

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