Definition of Seismic Input for Out-of-Plane Response of Masonry Walls: I. Parametric Study

Menon, Arun; Magenes, Guido

doi:10.1080/13632460903456981

Cited by 33 publications

(27 citation statements)

References 22 publications

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“…Therefore, it is possible to conclude that the closest data to the formed mechanism should be used as input for assessing the out-of-plane behavior of masonry façades. The effect of structure's filtering and amplification of the seismic input can be seen somewhat similar to recent studies for motion definition to be used in the assessment of out-of-plane behavior of unreinforced masonry buildings (e.g., [51,52]), as also addressed in [53] and [15]. Table II summarizes the numerical results in terms of peak displacement ratio Δ num /Δ exp (for t = 10.8 s), achieved during L4 -60% stage after mechanism activation, where Δ num is the numerical peak displacement while Δ exp is the experimental value (Δ exp = 33.6 mm).…”

Section: Laboratório Nacional De Engenhariasupporting

confidence: 71%

“…Therefore, it is possible to conclude that the closest data to the formed mechanism should be used as input for assessing the out‐of‐plane behavior of masonry façades. The effect of structure's filtering and amplification of the seismic input can be seen somewhat similar to recent studies for motion definition to be used in the assessment of out‐of‐plane behavior of unreinforced masonry buildings (e.g., ), as also addressed in and .…”

Section: Numerical Simulationssupporting

confidence: 59%

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Simulation of masonry out‐of‐plane failure modes by multi‐body dynamics

Costa

Penna

Arêde

et al. 2015

Earthq Engng Struct Dyn

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SUMMARYThe seismic assessment of the local failure modes in existing masonry buildings is currently based on the identification of the so-called local mechanisms, often associated with the out-of-plane wall behavior, whose stability is evaluated by static force-based approaches and, more recently, by some displacement-based proposals. Local mechanisms consist of kinematic chains of masonry portions, often regarded as rigid bodies, with geometric nonlinearity and concentrated nonlinearity in predefined contact regions (unilateral no-tension behavior, possible sliding with friction). In this work, the dynamic behavior of local mechanisms is simulated through multi-body dynamics, to obtain the nonlinear response with efficient time history analyses that directly take into account the characteristics of the ground motion. The amplification/ filtering effects of the structure are considered within the input motion.The proposed approach is validated with experimental results of two full-scale shaking-table tests on stone masonry buildings: a sacco-stone masonry façade tested at Laboratório Nacional de Engenharia Civil and a two-storey double-leaf masonry building tested at European Centre for Training and Research in Earthquake Engineering (EUCENTRE).

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Section: Laboratório Nacional De Engenhariasupporting

confidence: 71%

Section: Numerical Simulationssupporting

confidence: 59%

Simulation of masonry out‐of‐plane failure modes by multi‐body dynamics

Costa

Penna

Arêde

et al. 2015

Earthq Engng Struct Dyn

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“…A semi-analytical formulation to estimate acceleration demands on secondary elements, that explicitly considers inelastic response of the primary structure and its dynamic filtering effect, is proposed based on statistical evaluation of inelastic time-history analysis results within a parametric study described in the companion paper [Menon and Magenes, 2011].…”

Section: Discussionmentioning

confidence: 99%

“…(1). The calibration was performed using the regrouped ductility classes reported in Table 4b of the companion article [Menon and Magenes, 2011]. The coefficients were calibrated to the average spectra of ten THA performed using the set of natural stiff soil records, for each oscillator represented by the modified-Takeda hysteresis and for each observed displacement ductility demand class:…”

Section: Calibration Of Empirical Coefficientsmentioning

confidence: 99%

“…The parametric inelastic dynamic analysis, discussed in detail in the companion article [Menon and Magenes, 2011], is carried out using uncoupled seismic analyses of elastic single degree of freedom (SDOF) secondary system upon a nonlinear SDOF primary system. Since the focus here is basically on response of walls to out-ofplane excitation in URM buildings, neglecting coupling effects due to dynamic interaction is an acceptable assumption as the mass ratios (i.e., secondary system mass to primary system mass) are mostly less than 1% [Chen and Soong, 1988].…”

Section: Introductionmentioning

confidence: 99%

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Definition of Seismic Input for Out-of-Plane Response of Masonry Walls: II. Formulation

Menon

Magenes

2011

Journal of Earthquake Engineering

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The seismic input expected on an out-of-plane wall (or a generic secondary element) in a URM building is the ground excitation filtered by the in-plane response of the walls and the response of the floor diaphragms. More generally, the dynamic response of the primary structure, which can be nonlinear, contributes to the filtering phenomenon. Inelastic response of the primary structure can alter the secondary system response considerably in comparison to that under elastic structural response. The current article proposes a semi-analytical formulation to estimate the acceleration demand on an out-of-plane URM wall that explicitly takes into account the level of inelasticity in the primary structure in terms of the displacement ductility demand. A simplified approach to determine the acceleration profile over the height of a structure is also introduced. The formulation is based on statistical evaluation of the results of several inelastic time-history analyses treated within a parametric framework, which are presented in the companion article.

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Biaxial Effects in Unreinforced Masonry (URM) Load-Bearing Walls

Kollerathu

Menon

2018

Lecture Notes in Civil Engineering

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Definition of Seismic Input for Out-of-Plane Response of Masonry Walls: I. Parametric Study

Cited by 33 publications

References 22 publications

Simulation of masonry out‐of‐plane failure modes by multi‐body dynamics

Simulation of masonry out‐of‐plane failure modes by multi‐body dynamics

Definition of Seismic Input for Out-of-Plane Response of Masonry Walls: II. Formulation

Biaxial Effects in Unreinforced Masonry (URM) Load-Bearing Walls

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