Comparative assessment of finite element macro-modelling approaches for seismic analysis of non-engineered masonry constructions

Ravichandran, Nagavinothini; Losanno, Daniele; Parisi, Fulvio

doi:10.1007/s10518-021-01180-3

Cited by 16 publications

(14 citation statements)

References 69 publications

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“…Hence, five masonry properties were considered as lognormally distributed random variables (RVs) affecting the seismic behaviour of URM buildings, including mass density, Young's modulus, compressive strength, tensile strength and shear strength. Very limited tensile and shear strengths are usually responsible for frequent collapse cases of the selected URM buildings during earthquakes, as confirmed by recent numerical studies by these authors 54 …”

Section: Selection Of Building Archetypessupporting

confidence: 73%

“…The validation of the non-linear shell-layered numerical approach used in this study was recently developed by these authors using the same building archetype. 54 The seismic fragility assessment of the 1B archetype with different base isolation systems (using RR-FREIs and LRBs) along with a detailed sensitivity analysis on isolator properties, intensity measures, and fragility analysis methods can be found in. 27 Despite the availability of detailed investigations on this building archetype, it is also included in the present study to highlight the vulnerability of such simple structures in comparison with other common archetypes with different structural and architectural features.…”

Section: Classification Of Masonry Buildingsmentioning

confidence: 99%

“…Very limited tensile and shear strengths are usually responsible for frequent collapse cases of the selected URM buildings during earthquakes, as confirmed by recent numerical studies by these authors. 54 The median and coefficient of variation (CoV) of masonry properties are listed in Table 2. The values of CoV clearly indicate a large dispersion of masonry properties due to both use of locally available materials and lack of skilled workmanship and quality control during construction.…”

Section: Materials Propertiesmentioning

confidence: 99%

“…This 3D simplified modelling technique has been recently identified to be computationally efficient with acceptable accuracy. 54 The numerical models of the fixed-base URM buildings are shown in Figure 9. The masonry was assumed as an isotropic material with non-linear constitutive laws and the masonry walls were modelled using nonlinear layered shell elements with a diaphragm constraint at the first storey and roof level.…”

Section: Numerical Modelling Of Urm Building Archetypesmentioning

confidence: 99%

“…This simple URM building is considered in the present study due to the available experimental and numerical investigations. The validation of the non‐linear shell‐layered numerical approach used in this study was recently developed by these authors using the same building archetype 54 . The seismic fragility assessment of the 1B archetype with different base isolation systems (using RR‐FREIs and LRBs) along with a detailed sensitivity analysis on isolator properties, intensity measures, and fragility analysis methods can be found in 27 .…”

Section: Selection Of Building Archetypesmentioning

confidence: 99%

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Seismic fragility models for base‐isolated unreinforced masonry buildings with fibre‐reinforced elastomeric isolators

Losanno

Ravichandran

Parisi

2022

Earthq Engng Struct Dyn

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Unreinforced masonry (URM) buildings are highly vulnerable to seismic ground motion, calling for quantitative risk assessment and mitigation programmes in different earthquake‐prone countries to reduce future losses. Despite the effectiveness of base isolation technology in reducing seismic response of buildings, the high costs of conventional isolators prevent their application to low‐cost housing in developing countries. Fiber‐reinforced elastomeric isolators (FREIs) have been recently developed as low‐cost isolators suitable for application to URM buildings. The structural performance assessment of base isolated URM buildings using FREIs can be a sustainable solution for a large‐scale mitigation of seismic risk. In this context, the present study presents the seismic fragility analysis of both fixed‐base and base‐isolated URM buildings. Five URM building archetypes were considered to account for variation in geometry and building configuration. A number of static pushover analyses and nonlinear time history analyses were carried out to assess the capacity and demand of the selected buildings, respectively, while considering the uncertainties associated with material properties, capacity model, damage state and earthquake ground motion. The fragility curves were developed for both fixed‐base and base‐isolated configurations of the different archetypes. The results show that the probability of slight to moderate damage to fixed‐base URM buildings is significantly higher than their base‐isolated counterparts, demonstrating that FREIs significantly improve their seismic performance. These outcomes address further research in promoting the development of FREIs to reduce the vulnerability of URM buildings in developing countries.

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Section: Selection Of Building Archetypessupporting

confidence: 73%

Section: Classification Of Masonry Buildingsmentioning

confidence: 99%

Section: Materials Propertiesmentioning

confidence: 99%

Section: Numerical Modelling Of Urm Building Archetypesmentioning

confidence: 99%

Section: Selection Of Building Archetypesmentioning

confidence: 99%

See 3 more Smart Citations

Seismic fragility models for base‐isolated unreinforced masonry buildings with fibre‐reinforced elastomeric isolators

Losanno

Ravichandran

Parisi

2022

Earthq Engng Struct Dyn

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A robust computational strategy for failure prediction of masonry structures using an improved multi‐surface damage‐plastic based interface model

Nie

Sheikh

Visintin

et al. 2023

Numerical Meth Engineering

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In this study, a new traction‐separation based constitutive model for use in finite element simulation of masonry joints under complex loading conditions is developed for cohesive elements. The proposed model is formulated using damage parameters and plastic deformation with mutual couplings, and can accurately simulate the complex nonlinear behaviors of masonry joints considering hardening or softening of strength and stiffness degradation. To enhance the numerical stability of the model, plasticity and damage are separated algorithmically and implemented in two phases. In the first phase, the plastic deformations are treated using a multi‐surface plasticity model composed of a smooth hyperbolic yield surface for tension‐shear mixed‐mode failure and an elliptical cap primarily for the compressive failure. This is implemented in effective stress space and helps restrict the evolution of yield surfaces with no softening, significantly enhancing the efficiency of stress return mapping by the closed point projection method. In addition, an adaptive sub‐stepping scheme is adopted to further improve the robustness of the numerical implementation. In the second phase, nominal stresses are computed from the effective stresses using damage parameters. The evolution of these damage parameters is defined in terms of plastic work which is defined by a polynomial form, and is recommended in this study for a better calibration capability. Improvements are made in the formulation of compressive cap including incorporation of hardening of strength and stiffness degradations as these are ignored in existing interface models. This approach helped improve simulation of masonry under cyclic loads with tension‐compression transitions. For the structural level applications, the interface model is implemented within a finite element program, which is utilized to simulate failure of a number of masonry specimens under in‐plane/out‐of‐plane monotonic/cyclic loading. The simulated results are rigorously validated with existing experimental data that shows a good potential in modeling masonry structures.

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Numerical Investigation of the Properties of Unreinforced and Reinforced Nepalese Historical Brick Masonry Structures

Mishra,

Yamaguchi,

Jing

et al. 2023

RILEM Bookseries

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Comparative assessment of finite element macro-modelling approaches for seismic analysis of non-engineered masonry constructions

Cited by 16 publications

References 69 publications

Seismic fragility models for base‐isolated unreinforced masonry buildings with fibre‐reinforced elastomeric isolators

Seismic fragility models for base‐isolated unreinforced masonry buildings with fibre‐reinforced elastomeric isolators

A robust computational strategy for failure prediction of masonry structures using an improved multi‐surface damage‐plastic based interface model

Numerical Investigation of the Properties of Unreinforced and Reinforced Nepalese Historical Brick Masonry Structures

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