Rehabilitation of Masonry Buildings with Fibre Reinforced Mortar: Practical Design Considerations Concerning Seismic Resistance

2021 ◽  
Vol 898 ◽  
pp. 1-7
Author(s):  
Ingrid Boem ◽  
Natalino Gattesco
Keyword(s):  
Seismic Vulnerability ◽  
Seismic Resistance ◽  
Masonry Walls ◽  
Masonry Buildings ◽  
Historic Masonry ◽  
Collapse Mode ◽  
Practical Design ◽  
Out Of Plane ◽  
Historical Masonry

Historic masonry buildings experience a high seismic vulnerability: innovative intervention strategies for strengthening, based on the use of fibre-based composite materials are gradually spreading. In particular, the coupling of fibre-based materials with mortar layers (Fibre Reinforced Mortar technique - FRM) evidenced a good chemical and mechanical compatibility with the historical masonry and proved to be effective for the enhancement of both in-plane and out-of-plane performances of masonry, contrasting the opening of cracks and improving both resistance and ductility. The resistant mechanisms that arise in FRM strengthened masonry walls subjected to in-plane horizontal actions are analyzed in the paper and a practical design approach to evaluate their performances is illustrated, evidencing the dominant collapse mode at the varying of the masonry characteristics. Some masonry walls are analyzed numerically and analytically, as “case study”.

scholarly journals Seismic vulnerability of historic masonry buildings: a case study in the center of Lucca

2018 ◽  
Vol 11 ◽  
pp. 169-176 ◽  
Author(s):  
Sonia Boschi ◽  
Andrea Borghini ◽  
Barbara Pintucchi ◽  
Nicola Zani
Keyword(s):  
Seismic Vulnerability ◽  
Masonry Buildings ◽  
Historic Masonry

Seismic Vulnerability of Italian Historical Towns: The Case of Borgo San Rocco

2021 ◽  
Vol 109 ◽  
pp. 1-7
Author(s):  
Valentina Cima ◽  
Valentina Tomei ◽  
Ernesto Grande ◽  
Maura Imbimbo
Keyword(s):  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Masonry Buildings ◽  
Safety Level ◽  
Seismic Safety ◽  
Collapse Mechanisms ◽  
Complex Process ◽  
Out Of Plane ◽  
Historical Masonry ◽  
A Current

The assessment of the seismic safety level of masonry buildings is a current and important issue at the basis of the complex process of preservation of historical masonry buildings which constitute mostly the Italian and European towns. Nowadays, different approaches able to provide important information concerning the seismic safety level of masonry structures are available. Among these, fragility curves allow to have a prediction of potential damages during an earthquake of geographical areas characterized by similar construction typologies. The present paper concerns the derivation of fragility curves of masonry buildings, typical of Italian historical towns and mainly characterized by the possible occurrence of local out-of-plane collapse mechanisms. To this end, a real case is accounted in the study in order to consider specific parameters characterizing the constructions composing these territorial realities.

scholarly journals A case study on numerical simulation of a historical masonry building

2020 ◽  
Vol 3 (4) ◽  
pp. 289-294
Author(s):  
Embiya Tilki ◽  
Arif Velioğlu ◽  
Barış Sayın
Keyword(s):  
Numerical Analyses ◽  
Seismic Resistance ◽  
Masonry Building ◽  
Masonry Buildings ◽  
Structural Members ◽  
Historical Building ◽  
Modeling And Analysis ◽  
Linear Elastic ◽  
Historical Masonry

Masonry buildings are ordinarily complex construction systems and there is a lack of knowledge and information concerning the behavior of their seismic response. Due to the life safety of masonry buildings under seismic effects are very essential, numerical modeling and analysis of the buildings are an important issue. Because of the insufficient seismic resistance on structural members such as jack arch slabs and masonry walls, numerical studies have become necessary to determine the level of the structural strength of the structures. The tensile strength of load-bearing walls in the buildings is lower whereas, the compressive strength is higher. In this way, tensile cracks occur at structural members due to insufficient tensile resistance. Therefore, the tensile stress locations in the structure are critical. The study focuses on the assessment of historical masonry buildings from the point of seismic resistance. The entire process is performed using a case study from a historical masonry building. In this study conducted in this respect, the existing situation of a historical building using numerical analyses were presented with the cross-disciplinary study of civil engineering and architecture. The linear elastic analysis is selected as an analysis method. The seismic parameters are determined based on the Turkish Earthquake Code (TBEC 2018). Consequently, the study is performed to determine the seismic-resistant of historical buildings within the scope of numerical analyses.

Seismic vulnerability of historical masonry buildings: A case study in Ferrara

2008 ◽  
Vol 30 (8) ◽  
pp. 2223-2241 ◽  
Author(s):  
Vincenzo Mallardo ◽  
Roberto Malvezzi ◽  
Enrico Milani ◽  
Gabriele Milani
Keyword(s):  
Seismic Vulnerability ◽  
Masonry Buildings ◽  
Historical Masonry

scholarly journals An Improved Seismic Vulnerability Assessment Approach for Historical Urban Centres: The Case Study of Campi Alto di Norcia, Italy

2021 ◽  
Vol 11 (2) ◽  
pp. 849
Author(s):  
Federico Romis ◽  
Silvia Caprili ◽  
Walter Salvatore ◽  
Tiago M. Ferreira ◽  
Paulo B. Lourenço
Keyword(s):  
Seismic Vulnerability ◽  
Structural Characteristics ◽  
Vulnerability Index ◽  
Masonry Buildings ◽  
Seismic Behaviour ◽  
Priority List ◽  
Historic Masonry ◽  
Assessment Approach ◽  
Seismic Damage Assessment

Seismic damage assessment is an extraordinary opportunity to evaluate the reliability of vulnerability and risk methodologies applied to historic masonry buildings, giving the possibility of enhancing and optimising mitigation and retrofit strategies. Vulnerability index methodologies are flexible and powerful tools for assessing seismic vulnerability on the urban scale, providing a first screening of the critical issues present in masonry buildings and a possible priority list for the following retrofit operations. Such approaches account for the buildings’ different structural characteristics, directly or indirectly influencing their seismic behaviour and measured through different weights and classes finally providing a vulnerability index. In this paper, we show the application of three well-known methodologies to Campi Alto di Norcia’s medieval city in Valnerina (Italy) stroke by the earthquakes of 24 August and 30 October 2016. The methodologies’ reliability is assessed, based on the observation of real seismic consequences and damages on the masonry buildings, and an optimised methodology is then proposed for the considered case study.

Damage and Vulnerability Assessment of Churches after the 2002 Molise, Italy, Earthquake

2004 ◽  
Vol 20 (1_suppl) ◽  
pp. 271-283 ◽  
Author(s):  
Sergio Lagomarsino ◽  
Stefano Podestà
Keyword(s):  
Reinforced Concrete ◽  
Seismic Vulnerability ◽  
Shear Walls ◽  
Seismic Events ◽  
Masonry Walls ◽  
Masonry Buildings ◽  
Historic Masonry ◽  
Roof Structure ◽  
Seismic Force ◽  
Molise Earthquake

The 2002 Molise, Italy, earthquake sequence shocked the Italian public because it killed school children, but it also highlighted the fact that seismic vulnerability of historic masonry buildings has increased because of reinforcement work that has been done in the last 50 years. Replacing the original wooden roof structure with new reinforced concrete or steel elements, inserting reinforced concrete tie-beams in the masonry and new reinforced concrete floors, and using reinforced concrete jacketing on the shear walls are all widely used interventions. However, they lead to increased seismic force (because of greater weight) and to deformations incompatible with the masonry walls. The authors present results of an extensive survey of damage resulting from recent Italian seismic events (with particular reference to the Molise earthquake). We evaluate the effectiveness and applicability of some retrofitting methods in the hope that these findings will be taken into account in technical codes.

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