Comparison of in-plane and out-of-plane failure modes of masonry arch bridges using discontinuum analysis

Pulatsu, Bora; Erdogmus, Ece; Lourenço, Paulo B.

doi:10.1016/j.engstruct.2018.10.016

Cited by 70 publications

(16 citation statements)

References 34 publications

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“…where s = surface enclosing the mass, m, which is concentrated at the grid point σ ij = zone stress tensor n j = unit outward normal from the surface FDEM has been successfully applied to historic structures previously. Pulatsu et al (2018) highlighted the use of FDEM for analyzing masonry-soil interactions for bridges [49] and Napolitano et al (2019) preliminarily outlined the use of FDEM to model mortar-stone interaction [13]. Additionally, the approach of comparing crack patterns in FDEM/DEM simulations and existing cracks in masonry walls to ascertain unknown damage conditions has been used in Napolitano et al (2019) [13] as well as proven against experimental testing of masonry walls in Napolitano et al (2018) [50].…”

Section: Theory and Background For Numerical Modelingmentioning

confidence: 99%

Integrating Non-Destructive Testing, Laser Scanning, and Numerical Modeling for Damage Assessment: The Room of the Elements

2019

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For preservation efforts and stability assessment of historic structures it is imperative to understand the extent of existing damages and possible modes for how they could have occurred. The aim of this work is to illustrate the importance of integrating documentation, non-destructive testing, and numerical modeling for damage assessment of heritage structures. In particular, this work explores the synthesis of these techniques on a plastered masonry wall in Palazzo Vecchio. Laser scanning was used to capture the geometry of the wall while terrestrial photogrammetry and high-resolution images were used to document the magnitude of cracking in the plaster layer. High resolution thermal images were used to document the distribution of stones and additional cracks not visible through the plaster layer. The results of documentation and non-destructive testing were used to generate an as-built model for structural analysis. Finite distinct element modeling was used to simulate the response of the wall to a series of loading conditions. By comparing the results of simulation to existing crack patterns, theories for how the damage occurred were generated.

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Section: Theory and Background For Numerical Modelingmentioning

confidence: 99%

Integrating Non-Destructive Testing, Laser Scanning, and Numerical Modeling for Damage Assessment: The Room of the Elements

2019

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“…Moreover, failure at the riverbed is reached due to the mobilization of the foundation. Meanwhile, both arch failures show the characteristic shape of the hinging mechanism [27].…”

Section: Influence Of Scour Depth In the Reliability Of The Structurementioning

confidence: 99%

Reliability-Based Assessment of a Masonry Arch Bridge Under Flood Events

Cabanzo¹,

Ariza²,

Sousa³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Natural disasters are unavoidable and can cause serious damage to bridges, which may lead to catastrophic losses both human and economic. In the US more than 45% of bridge collapses are caused by flood events in which more than one-third are caused by scouring effects. In 2015, part of the Tadcaster bridge, a masonry arch bridge in North Yorkshire UK, collapsed during a flooding event. This tragedy was followed by another one in 2019 when a masonry bridge collapsed in the same county. Therefore, the assessment of bridges susceptible to these events is of paramount importance as to identify possible mitigation needs. The objective of the present paper is to present a consistent framework to obtain the reliability index of a masonry arch bridge (MAB), under flood hazard that is subject to local scour, using surrogate models to reduce the computational effort of the probabilistic analysis. The proposed framework is tested on a MAB located in Portugal. A two-dimensional numerical model is constructed where the random variables that affect the structural capacity and the scour geometry were considered. The results show the failure mechanism of the MAB when subjected to scour-induced settlements, therefore allowing to identify the vulnerable zones along the arch's length. The presented methodology can be used to assess the bridge performance under a flood event, thus providing useful information for bridge management and monitoring. Moreover, it can be further developed to include fragility analysis and vulnerability assessment.

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“…During the last several decades, discrete element modeling became an attractive solution in the analyses of different types of masonry structures due to its capability of capturing the nonlinear behavior and collapse mechanisms of masonry systems [20][21][22][23]. It should be noted that a…”

Section: Introductionmentioning

confidence: 99%

Simulation of the in-plane structural behavior of unreinforced masonry walls and buildings using DEM

et al. 2020

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In this study, a novel computational modeling strategy is proposed to estimate the lateral load capacity and behavior of unreinforced masonry (URM) structures. All commonly noted failure mechanisms are captured via the proposed modeling strategy using the discrete element method (DEM) in three-dimensions (3D). Masonry walls are represented as a system of elastic discrete blocks, where the nodal velocities are evaluated by integrating the equations of motion using the central difference method. Then, the mechanical interactions among adjacent blocks are examined utilizing the relative contact displacements and employed in the contact stress calculation. Through this research, a new stress-displacement contact constitutive model is considered and implemented in the commercial software 3DEC, which includes softening stressdisplacement behavior for tension, shear, and compression along with the fracture energy concept. The results of the discontinuum models are validated on small-and large-scale experimental studies available in the literature with good agreement. Furthermore, important inferences are made regarding the effect of block size, the number of contact points, and contact stiffness values for robust and accurate simulations of masonry walls.

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Comparison of in-plane and out-of-plane failure modes of masonry arch bridges using discontinuum analysis

Abstract: This is a pre-print version of an article published in Engineering Structures. Pulatsu, B., Erdogmus, E., & Lourenço, P. B. (2019). Comparison of in-plane and out-of-plane failure modes of masonry arch bridges using discontinuum analysis.

Cited by 70 publications

References 34 publications

Integrating Non-Destructive Testing, Laser Scanning, and Numerical Modeling for Damage Assessment: The Room of the Elements

Integrating Non-Destructive Testing, Laser Scanning, and Numerical Modeling for Damage Assessment: The Room of the Elements

Reliability-Based Assessment of a Masonry Arch Bridge Under Flood Events

Simulation of the in-plane structural behavior of unreinforced masonry walls and buildings using DEM

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