2021
DOI: 10.1002/eqe.3547
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Bi‐directional collapse fragility assessment by DFEM of unreinforced masonry buildings with openings and different confinement configurations

Abstract: Unreinforced masonry (URM) buildings that are characterized by brittle, heterogeneous, and anisotropic responses have complex nonlinear dynamic behavior and high vulnerability under seismic loading. While masonry confined by tie‐columns and lintel beams can achieve better ductility and stability, the wall openings induce stress concentration around the corners and diminish the strength. Furthermore, the interacting in‐plane and out‐of‐plane responses of masonry walls could significantly affect the post‐crackin… Show more

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Cited by 9 publications
(6 citation statements)
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“…where f E c elastic strain at the peak stress; ε the total strain; ε p plastic strain with stiffness degradation; d the damage factor; σ the tension or compression stress; f is either the tensile or compressive strength of concrete as appropriate. The values of the concrete damage parameters are suggested based on [39][40][41][42][43]. The parameters are introduced in Table 2.…”
Section: Materials Model Of Steel and Reinforcementmentioning
confidence: 99%
“…where f E c elastic strain at the peak stress; ε the total strain; ε p plastic strain with stiffness degradation; d the damage factor; σ the tension or compression stress; f is either the tensile or compressive strength of concrete as appropriate. The values of the concrete damage parameters are suggested based on [39][40][41][42][43]. The parameters are introduced in Table 2.…”
Section: Materials Model Of Steel and Reinforcementmentioning
confidence: 99%
“…Thus, there is a growing trend towards the use of precise numerical modeling approaches for simulating masonry structures because they are capable of solving complex nonlinear problems. [3][4][5][6][7][8][9][10] In this context, Lourenco 11 has classified the modeling strategies of masonry structures into three groups: (1) detailed micro-modeling, 12 where bricks and mortars are discretely modeled using continuum elements and brick-mortar interfaces are modeled with zero thickness cohesive elements;…”
Section: Introductionmentioning
confidence: 99%
“…Though empirical based approaches 2 can provide an easy solution of this problem, they only give an approximate solution that may not be adequate to assess the safety of large masonry buildings with complex architectural forms. Thus, there is a growing trend towards the use of precise numerical modeling approaches for simulating masonry structures because they are capable of solving complex nonlinear problems 3–10 . In this context, Lourenco 11 has classified the modeling strategies of masonry structures into three groups: (1) detailed micro‐modeling, 12 where bricks and mortars are discretely modeled using continuum elements and brick‐mortar interfaces are modeled with zero thickness cohesive elements; (2) macro‐modeling, 13,14 where bricks and mortars are homogenized as a single continuum utilizing a representative volume element (RVE); and (3) simplified micro‐modeling, 15 where bricks are modeled using continuum elements, while cohesive elements are used for mortar joints (entire thickness) and artificial joints placed inside bricks to simulate the potential crack in bricks.…”
Section: Introductionmentioning
confidence: 99%
“…Following these behavioral mechanics, considerable research efforts have been made to evaluate the in-plane resistance of the URM walls. (Nayak and Dutta 2016a;Deb et al 2021).…”
Section: Introductionmentioning
confidence: 99%