- In-situ Test for the Shear Strength Evaluation of Masonry: the Case of a Building Hit by L’Aquila Earthquake (Italy)
- M. Candela ; S. Cattari ; S Lagomarsino ; M Rossi ; R. Fonti ; E. Pagliuca
- Book Title / Journal: Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: in-situ shear test ; masonry ; in-plane behaviour
- Description
- The assessment of historical masonry mechanical parameters, in particular of the shear strength, is one of the
most critical issues related to historical buildings preservation and safety evaluation in seismic area: this is due to the difficulty in performing reliable tests without making an excessive impact on the structure. Many doubts
related to L’Aquila masonry quality, arisen during post-earthquake rehabilitation and reconstruction, might be
solved by destructive in-situ tests. To this aim, a masonry building severely damaged by the 2009 L’Aquila earthquake was chosen as able to execute an in-situ shear tests. The building has been selected by considering different aspects, like as: safety of worker; accessibility; representativeness of masonry for typical historical buildings in the Abruzzo region. This paper focuses on the procedures to carry out the experimental campaign, the analysis of results and their comparison with reference ranges proposed in the Italian Code for Structural Design.
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- Analytically Derived Fragility Curves for Unreinforced Masonry Buildings in Urban Contexts
- D. D’Ayala ; E. Kishali
- Book Title / Journal: Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: Vulnerability functions ; masonry ; performance based assessment
- Description
- Masonry buildings are the most common form of dwelling worldwide and at the same time one of the most vulnerable to seismic action. Large numbers of casualties and substantial economic losses are associated with masonry building partial and total collapses in urban and rural areas. Usually studies of vulnerability of masonry structures are conducted within an empirical framework, based on past observation and historic damage data. However empirical approaches have limitation in terms of regional applicability and comparison among different
typological and geographical context. The paper presents an analytical approach, FaMIVE, based on limit state analysis, which allows defining capacity curves and performance points for masonry structures. The analytical development of the procedure from derivation of the ultimate capacity to the identification of the damage states in terms of drift, to the convolution of the capacity and spectral curves to identify performance points for given level of shaking is presented. Fragility curves are then derived. An application to masonry structures in Turkey shows the advantages of this approach. This work was carried out within the framework of the WHE-PAGER project (http://pager.world-housing.net/)
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- Revision of IAEE Guidelines for Earthquake Resistant Non-Engineered Construction
- A.S. Arya ; T. Boen ; Y. Ishiyama
- Book Title / Journal: Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal
- Year: 2012 , Volume: , Series:
- Earthquake engineering
- Keywords: non-engineered construction ; masonry
- Description
- A large majority of houses and buildings in the world can be classified as non-engineered construction, e.g. (1) un-reinforced masonry, (2) confined masonry, (3) wooden construction, (4) earthen construction (adobe or tapial). Most of the loss of life in past earthquakes has occurred due to the collapse of these houses and buildings. Because of the continued use of such construction, it is essential to introduce earthquake resistant features in their construction. The International Association for Earthquake Engineering (IAEE) published the “Guidelines for Earthquake Resistant Non-Engineered Construction” in 1986. More than twenty years have passed since the publication and the guidelines are still used in many parts in the world, the revision of the guidelines was discussed among three of the committee members for the 1986 edition. The revision is going to be completed with the supports of UNESCO and the International Institute of Seismology and Earthquake Engineering (IISEE), JAPAN.
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