Modelling the Seismic Behaviour of a Historical Masonry Building with Internal Wooden Structure

AbstractA hybrid seismic fragility model for territorial-scale seismic vulnerability assessment of masonry buildings is developed and presented in this paper. The method combines expert-judgment and mechanical approaches to derive typological fragility curves for Italian residential masonry building stock. The first classifies Italian masonry buildings in five different typological classes as function of age of construction, structural typology, and seismic behaviour and damaging of buildings observed following the most severe earthquakes occurred in Italy. The second, based on numerical analyses results conducted on building prototypes, provides all the parameters necessary for developing fragility functions. Peak-Ground Acceleration (PGA) at Ultimate Limit State attainable by each building’s class has been chosen as an Intensity Measure to represent fragility curves: three types of curve have been developed, each referred to mean, maximum and minimum value of PGAs defined for each building class. To represent the expected damage scenario for increasing earthquake intensities, a correlation between PGAs and Mercalli-Cancani-Sieber macroseismic intensity scale has been used and the corresponding fragility curves developed. Results show that the proposed building’s classes are representative of the Italian masonry building stock and that fragility curves are effective for predicting both seismic vulnerability and expected damage scenarios for seismic-prone areas. Finally, the fragility curves have been compared with empirical curves obtained through a macroseismic approach on Italian masonry buildings available in literature, underlining the differences between the methods.

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Effects of Structural Parameters on Seismic Behaviour of Historical Masonry Minaret

Periodica Polytechnica Civil Engineering ◽

10.3311/ppci.10687 ◽

2017 ◽

Cited By ~ 2

Author(s):

Barış Erdil ◽

Mücip Tapan ◽

İsmail Akkaya ◽

Fuat Korkut

Keyword(s):

Modal Analysis ◽

Structural Parameters ◽

Masonry Structure ◽

Operational Modal Analysis ◽

Shear Cracks ◽

Seismic Behaviour ◽

New Model ◽

The Core ◽

Historical Masonry ◽

Stiffness Distribution

The October 23, 2011 (Mw = 7.2) and November 9, 2011 (Mw = 5.6) earthquakes increased the damage in the minaret of Van Ulu Mosque, an important historical masonry structure built with solid bricks in Eastern Turkey, resulting in significant shear cracks. It was found that since the door and window openings are not symmetrically placed, they result in unsymmetrical stiffness distribution. The contribution of staircase and the core on stiffness is ignorable but its effect on the mass is significant. The pulpit with chamfered corner results in unsymmetrical transverse displacements. Brace wall improves the stiffness however contributes to the unsymmetrical behaviour considerably. The reason for the diagonal cracks can be attributed to the unsymmetrical brace wall and the chamfered pulpit but the effect of brace wall is more pronounced. After introducing the cracks, a new model was created and calibrated according to the results of Operational Modal Analysis. Diagonal cracks were found to be likely to develop under earthquake loading. Drifts are observed to increase significantly upon the introduction of the cracks.

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Seismic Assessment of an Historical Masonry Building using Nonlinear Static Analysis

Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing ◽

10.4203/ccp.102.72 ◽

2013 ◽

Cited By ~ 2

Author(s):

F. Bucchi ◽

S. Arangio ◽

F. Bontempi

Keyword(s):

Static Analysis ◽

Seismic Assessment ◽

Nonlinear Static Analysis ◽

Masonry Building ◽

Historical Masonry ◽

Nonlinear Static

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Analysis of Equivalent Diaphragm Vault Structures in Masonry Construction under Horizontal Forces

Heritage ◽

10.3390/heritage3030054 ◽

2020 ◽

Vol 3 (3) ◽

pp. 989-1017

Author(s):

Pier Silvio Marseglia ◽

Francesco Micelli ◽

Maria Antonietta Aiello

Keyword(s):

Seismic Design ◽

Complex Geometry ◽

Geometrical Parameters ◽

Masonry Building ◽

Masonry Construction ◽

Horizontal Connections ◽

Historical Masonry ◽

Side Walls ◽

Definition Of ◽

The Ideal

In seismic areas, masonry construction is prone to brittle failures due to the mechanical behavior of the constituent materials and to the low capacity of force redistributions. The redistribution capacity is mainly due to the presence of horizontal connections upon the walls and to the stiffness of the roof, which is typically a vaulted structure. The modeling of the global behavior of a masonry building, taking into account the accurate stiffness of the vaults, is a major issue in seismic design and assessment. The complex geometry of the vaults can be considered as an equivalent plate, able to replicate the stiffness behavior and the force redistribution capacity of the real vault. In this study, the efforts of the authors are addressed to the definition of a plate, able to replace the vaulted surfaces in a global numerical model. The ideal diaphragm is considered as a generally orthotropic plate with the same footprint and the same thickness of the original vault. An extended parametric study was conducted in which the mechanical and geometrical parameters were varied, such as the vault thickness, its dimensions, the constraint conditions, and the possible presence of side walls. The results are presented and discussed herein, with the aim of providing useful information to the researchers and practitioners involved in seismic analyses of historical masonry construction.

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SSI on the Dynamic Behaviour of a Historical Masonry Building: Experimental versus Numerical Results

Buildings ◽

10.3390/buildings4040978 ◽

2014 ◽

Vol 4 (4) ◽

pp. 978-1000 ◽

Cited By ~ 2

Author(s):

Francesca Ceroni ◽

Stefania Sica ◽

Angelo Garofano ◽

Marisa Pecce

Keyword(s):

Dynamic Behaviour ◽

Numerical Results ◽

Masonry Building ◽

Historical Masonry ◽

Experimental Versus

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Use of Structural Steel Frames for Structural Restoration of URM Historical Buildings in Seismic Areas

Journal of Earthquake and Tsunami ◽

10.1142/s1793431117500129 ◽

2017 ◽

Vol 11 (04) ◽

pp. 1750012

Author(s):

Vail Karakale

Keyword(s):

Structural Steel ◽

Seismic Performance ◽

Steel Frames ◽

Masonry Building ◽

Lateral Stiffness ◽

Historic Buildings ◽

Structural System ◽

Historical Buildings ◽

Structural Restoration ◽

Historical Masonry

Historic buildings and monuments are an important part of our cultural heritage that must be protected and their sustainability ensured, especially when earthquakes occur. In this paper, a technique that uses structural steel frames is proposed as one way of strengthening unreinforced masonry (URM) in historical buildings. The idea underpinning this technique is to reduce the earthquake displacement demand on non-ductile URM walls by attaching steel frames to the building floors from inside. These frames run parallel to the structural system of the building and are fixed at their base to the existing foundation of the building. Furthermore, they are constructed rapidly, do not occupy architectural space, save the building’s historic fabric, and can be easily replaced after an earthquake if some minor damage ensues. The proposed technique was applied to a five-story historical masonry building in Istanbul. The results of seismic performance analysis indicate that even though the building has plan irregularities, the proposed steel frames are able to effectively enhance the building’s seismic performance by reducing inter-story drifts and increasing lateral stiffness and strength.

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Fragility Curves for Italian Urm Buildings Based on a Hybrid Method

10.21203/rs.3.rs-341542/v1 ◽

2021 ◽

Author(s):

Antonio Sandoli ◽

Gian Piero Lignola ◽

Bruno Calderoni ◽

Andrea Prota

Keyword(s):

Seismic Vulnerability ◽

Fragility Curves ◽

Limit State ◽

Ultimate Limit State ◽

Masonry Building ◽

Masonry Buildings ◽

Seismic Behaviour ◽

Building Stock ◽

Ground Acceleration ◽

Damage Scenario

Abstract A hybrid seismic fragility model for territorial-scale seismic vulnerability assessment of masonry buildings is developed and presented in this paper. The method combines expert-judgment and mechanical approaches to derive typological fragility curves for Italian residential masonry building stock. The first classifies Italian masonry buildings in five different typological classes as function of age of construction, structural typology, and seismic behaviour and damaging of buildings observed following the most severe earthquakes occurred in Italy. The second, based on numerical analyses results conducted on building prototypes, provides all the parameters necessary for developing fragility functions.Peak-Ground Acceleration (PGA) at Ultimate Limit State attainable by each building’s class has been chosen as an Intensity Measure (IM) to represent fragility curves: three types of curve have been developed, each referred to mean, maximum and minim value of PGAs defined for each buildings class.To represent the expected damage scenario for increasing earthquake intensities, a correlation between PGAs and Mercalli-Cancani-Sieber (MCS) macroseismic intensity scale has been used and the corresponding fragility curves developed.Results show that the proposed building’s classes are representative of the Italian masonry building stock and that fragility curves are effective for predicting both seismic vulnerability and expected damage scenarios for seismic-prone areas. Finally, the fragility curves have been compared with empirical curves obtained through a macroseismic approach on Italian masonry buildings available in literature, underlining the differences between the methods.

Download Full-text