Review of Different Pushover Analysis Methods Applied to Masonry Buildings and Comparison with Nonlinear Dynamic Analysis

Endo, Yohei; Pelà, Luca; Roca, Pere

doi:10.1080/13632469.2016.1210055

Cited by 57 publications

(35 citation statements)

References 25 publications

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“…The safety assessment of this structure in its current state was carried out in this study using a force based method by means of pushover analyses. In this case, the horizontal forces adopted to represent the seismic action were proportional to the mass, independently from their height distribution in the structure, since good correlations have been found in terms of capacity between mass proportional pushover analysis and time history analysis in previous studies performed on historical constructions [14]. The results obtained from the pushover analyses were used to verify the structural performance by means of verification of base shear and the estimation of failure mechanisms with their damage distribution.…”

Section: Nonlinear Static Analysismentioning

confidence: 99%

Engineering simulations of a super-complex cultural heritage building: Ica Cathedral in Peru

2017

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The Cathedral of Ica, Peru, is one of the four prototype buildings involved in the ongoing Seismic Retrofitting Project, initiative of the Getty Conservation Institute. The complex historical building, which was heavily damaged by earthquakes in 2007 and 2009, can be divided into two substructures: an external masonry envelope and an internal timber frame built by a construction method known as quincha technique. This study makes use of the information available in literature and the results obtained from experimental campaigns performed by Pontificia Universidad Católica del Perú and University of Minho. Nonlinear behaviour of masonry is simulated in the numerical models by considering specified compressive and tensile softening behaviour, while isotropic homogeneous and linear behaviour is adopted for modelling timber with appropriate assumptions on the connections. A single representative bay was initially studied by performing linear elastic analysis and verifying the compliance with the various criteria specified by the applicable normative to discuss the actual failure of Ica Cathedral. Afterwards, the structural behaviour of the two substructures composing the Cathedral is evaluated independently. Finally, the interaction of these two substructures is investigated by performing structural analysis on the entire structure of Ica Cathedral. Several structural analysis techniques, including eigenvalue, nonlinear static and dynamic analyses, are performed in order to: (1) evaluate the dominant mode shapes of the structure; (2) validate the numerical models by reproducing the structural damage observed in-situ; (3) estimate the structural performance; and (4) identify the main failure mechanisms.

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Section: Nonlinear Static Analysismentioning

confidence: 99%

Engineering simulations of a super-complex cultural heritage building: Ica Cathedral in Peru

2017

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“…The EC8-1 (CEN, 2004) recommends applying at least two distributions of lateral loads: uniform -proportional to the mass, and modal -proportional to the fundamental mode shape. Several authors do not recommend the use of a modal distribution for the analysis of URM buildings with flexible diaphragms, mainly due to the low mass participation involved in the first modes of vibration of the structure (Marino et al, 2018;Lourenço et al, 2011;Endo et al, 2017). A possible alternative is the use of the inverse-triangular load distribution -proportional to the product between the mass and the height of the node -because it assures that the seismic masses in all parts of the building are involved in the pushover analysis (Lagomarsino and Cattari, 2015;Cattari et al, 2015).…”

Section: Definition Of the Capacity By Non-linear Static Analysesmentioning

confidence: 99%

Fragility Functions for Tall URM Buildings around Early 20th Century in Lisbon. Part 1: Methodology and Application at Building Level

Simões

Bento

Lagomarsino

et al. 2019

International Journal of Architectural Heritage

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The article proposes a procedure for the derivation of fragility functions for unreinforced masonry buildings considering the in-plane and out-of-plane response. Different approaches are considered for the generation of the corresponding fragility functions and for the evaluation of the propagation of uncertainties. The contributions for the dispersion of the fragility functions account for the variability in the definition of the capacity, the aleatory uncertainty in the definition of the seismic demand and the aleatory uncertainty in the definition of the modified/floor response spectrum, when the local mechanisms are located in the upper level of the building. In the end, the individual fragility curves are properly combined in order to define a single fragility curve for the class of buildings. As a case study, the procedure is applied to the assessment of one of the most vulnerable unreinforced masonry buildings constructed in the early 20 th century in Lisbon, considering a typical prototype building with five storeys high. Results for a seismic event, as defined in the earthquake-resistant code for Lisbon, indicate that the typical building has about 50% probability of having heavy damage and about 30% probability of collapse.

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“…To understand the current damage of the Armenian Church and to assess its structural behavior, non-linear analyses were first performed for vertical and horizon- tal loading following a mass-proportional load-pattern approach, independently from their height distribution in the structure, since good correlations have been found in terms of capacity between mass proportional pushover analysis and time history analysis in previous studies performed on historical constructions [Endo et al, 2017], [Peña et al, 2010]. The full Newton-Raphson method, based on an energy convergence control with tolerance 10 -3 , was adopted for solving the non-linear problems arising from the equilibrium and compatibility conditions.…”

Section: Non-linear Safety Analysismentioning

confidence: 99%

Seismic assessment of the medieval Armenian church in Famagusta, Cyprus

Braga

Lourenço

Mendes

2019

Annals of Geophysics

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This paper presents the analysis of the structural performance of the Armenian Church in Famagusta, Cyprus. Visual and photographic survey, non−destructive testing and numerical evaluation, using a tridimensional finite element model, are included. The non−linear be− havior is analyzed under gravity and seismic loading, and pushover and time−history analysis are performed, including in both cases bidi− rectional loading. Results are studied in terms of capacity curves and damage patterns. The influence of the Church mass−distribution is also evaluated. As a result, the analysis estimates an adequate safety level of the building and various real damage features of the Church are justified and attributed to seismic actions.

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Review of Different Pushover Analysis Methods Applied to Masonry Buildings and Comparison with Nonlinear Dynamic Analysis

Cited by 57 publications

References 25 publications

Engineering simulations of a super-complex cultural heritage building: Ica Cathedral in Peru

Engineering simulations of a super-complex cultural heritage building: Ica Cathedral in Peru

Fragility Functions for Tall URM Buildings around Early 20th Century in Lisbon. Part 1: Methodology and Application at Building Level

Seismic assessment of the medieval Armenian church in Famagusta, Cyprus

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