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A new discrete macro-element in an analytical platform for seismic assessment of unreinforced masonry buildings

•A practical platform for numerical simulation of unreinforced masonry buildings is proposed.•The proposed method represents in-plane flexural and shear responses of URM piers and spandrels.•Satisfactory prediction of the failure modes, strength, drift and hysteretic behavior. This paper proposes a...

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Published in:Engineering structures 2017-12, Vol.152, p.381-396
Main Authors: Aghababaie Mobarake, A., Khanmohammadi, M., Mirghaderi, S.R.
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Language:English
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container_title Engineering structures
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creator Aghababaie Mobarake, A.
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description •A practical platform for numerical simulation of unreinforced masonry buildings is proposed.•The proposed method represents in-plane flexural and shear responses of URM piers and spandrels.•Satisfactory prediction of the failure modes, strength, drift and hysteretic behavior. This paper proposes a practice-oriented platform for numerical simulation of Unreinforced Masonry (URM) buildings. It is based on introducing a new two-dimensional discrete model compatible with most existing structural analysis softwares. The proposed platform comprises of two individual two-dimensional macro-elements, a basic macro-element for modeling the piers and spandrels and a rigid-interface macro-element for modeling the nodal regions. A complete set of constitutive equations and behavioral specifications is proportionally characterized and discussed for the basic macro-element based on its phenomenology and the past experimental studies. The proposed approach provides a rather simple and efficient platform for linear or nonlinear static and dynamic analyses by considering the in-plane behavior of the URM panels. The validation of the proposed analytical platform is conducted using the results of the past experimental tests on a considerable number of piers, spandrels and a perforated wall. The comparisons indicate that the predicted failure mode and hysteretic behavior as well as the ultimate strength and displacement capacity of these specimens are in a satisfactory agreement. In particular, derivation and interpretation of the results in the proposed approach are straightforward and simple; hence, engineers can use this approach for seismic design or retrofit studies. The proposed platform can be further developed and effectively used for modeling a large building or numerous buildings.
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The validation of the proposed analytical platform is conducted using the results of the past experimental tests on a considerable number of piers, spandrels and a perforated wall. The comparisons indicate that the predicted failure mode and hysteretic behavior as well as the ultimate strength and displacement capacity of these specimens are in a satisfactory agreement. In particular, derivation and interpretation of the results in the proposed approach are straightforward and simple; hence, engineers can use this approach for seismic design or retrofit studies. 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subjects Aseismic buildings
Building construction
Building failures
Buildings
Computer simulation
Constitutive equations
Constitutive relationships
Design engineering
Discrete macro-modeling
Earthquake construction
Failure modes
In-plane response
Masonry
Mathematical models
Nonlinear analysis
Phenomenology
Piers
Seismic activity
Seismic design
Seismology
Spandrels
Structural analysis
Two dimensional models
Ultimate tensile strength
Unreinforced masonry walls
URM panels
title A new discrete macro-element in an analytical platform for seismic assessment of unreinforced masonry buildings
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