Seismic Vulnerability Assessment of Masonry Buildings in Seismic Prone Regions: The Case of Annaba City, Algeria

Authors: Allaeddine Athmani, Abdelhacine Gouasmia, Tiago Ferreira, Romeu Vicente

Abstract:

Seismic vulnerability assessment of masonry buildings is a fundamental issue even for moderate to low seismic hazard regions. This fact is even more important when dealing with old structures such as those located in Annaba city (Algeria), which the majority of dates back to the French colonial era from 1830. This category of buildings is in high risk due to their highly degradation state, heterogeneous materials and intrusive modifications to structural and non-structural elements. Furthermore, they are usually shelter a dense population, which is exposed to such risk. In order to undertake a suitable seismic risk mitigation strategies and reinforcement process for such structures, it is essential to estimate their seismic resistance capacity at a large scale. In this sense, two seismic vulnerability index methods and damage estimation have been adapted and applied to a pilot-scale building area located in the moderate seismic hazard region of Annaba city: The first one based on the EMS-98 building typologies, and the second one derived from the Italian GNDT approach. To perform this task, the authors took the advantage of an existing data survey previously performed for other purposes. The results obtained from the application of the two methods were integrated and compared using a geographic information system tool (GIS), with the ultimate goal of supporting the city council of Annaba for the implementation of risk mitigation and emergency planning strategies.

Keywords: Annaba city, EMS98 concept, GNDT method, old city center, seismic vulnerability index, unreinforced masonry buildings.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1125949

References:

[1] DPBM (2011), Direction of Programming and Budget Monitoring, Monographic directory of Annaba city, Annaba, Algeria.
[2] CTC (2010) technical organism officially in charge of the Technical Control of Construction of Annaba city, Technical expertise study of the old buildings in the city of Annaba, Annaba, Algeria.
[3] Barbat A H, Carreño M L, Pujades LG, Lantada N, Cardona OD, Murulanda MC (2010), “Seismic vulnerability and risk evaluation methods for urban areas A review with application to a pilot area”, Struct Infrastruct Eng 6(1–2):17–38.
[4] Ferreira, T M, Vicente, R, Mendes da Silva, J A R, Varum, H., Costa, A (2013) “Seismic vulnerability assessment of historical urban centres: case study of the old city centre in Seixal, Portugal”, Bulletin of Earthquake Engineering, 11(5), 1753–1773. (Springer, Netherlands) doi:10.1007/s10518-013-9447-2.
[5] Calvi GM, Pinho R, Magenes G, Bommer JJ, Restrepo-Vélez LF, Crowley H (2006), “Development of seismic vulnerability assessment methodologies over the past 30 years”, ISET J Earthq Technol 43:75–104.
[6] Grünthal G (1998), European macroseismic scale 1998 (EMS-98), vol 19, Centre Européen de Géodynamique et de Séismologie, Luxembourg.
[7] GNDT (1993), “Rischio sismico di edifici pubblici - Parte I: aspetti metodologici”, Centro Servizi Quasco, Bologna.
[8] Mouroux, P, Bertrand, M, Bour, M, Brun, B L, Depinois, S, Masure, P and Risk-UE team (2004), “The European Risk-UE Project: An advanced approach to earthquake risk scenarios”, Proceedings of the 13th World Conference Earthquake.
[9] RISK-UE (2003), “An advanced approach to earthquake risk scenarios with applications to different European towns”, European project, EVK4-CT-2000-00014.
[10] Giovinazzi S, Lagomarsino S (2004) A macroseismic model for the vulnerability assessment of buildings. In: Proceedings of the 13th world conference on earthquake engineering, Vancouver, Canada, paper 896 (CD-Rom).
[11] Giovinazzi S, y Lagomarsino, S (2002), “WP04: Guidelines for the implementation of the I level methodology for the vulnerability assessment of current buildings”, Genoa, Italy.
[12] Milutinovic ZV, Trendafiloski GS (2003), “An advanced approach to earthquake risk scenarios with applications to different European towns: WP4-Vulnerability of current buildings”, handbook, September 2003.
[13] Vicente RS, Parodi S, Lagomarsino S, Varum H, Mendes da Silva JAR (2011), “Seismic vulnerability and risk assessment: case study of the historic city centre of Coimbra, Portugal”, Bull Earthq Eng 9(4):1067–1096.
[14] Vicente RS, Rodrigues H, Varum H (2011), “Evaluation of strengthening techniques of traditional masonry buildings: case study of a four-building aggregate”, J Perform Constr Facil 25(3):202. doi:10.1061/ (ASCE) CF.1943-5509.0000164.
[15] Ferreira TM, Vicente R, Varum H (2014) Seismic vulnerability assessment of masonry facade walls: development, application and validation of a new scoring method. Structural Engineering and Mechanics. An International Journal. Techno Press. 50(4), 541-561. doi: 10.12989/sem.2014.50.4.541.
[16] Santos C, Ferreira TM, Vicente R, Mendes da Silva J.A.R. (2013) Building typologies identification to support risk mitigation at the urban scale - Case study of the old city centre of Seixal, Portugal. Journal of Cultural Heritage. Elsevier. 14(6), 449-463. doi: 10.1016/j.culher.2012.11.001.
[17] Boukri M, Bensaibi M, “Vulnerability index of Algiers masonry buildings”, the 14th World Conference on Earthquake Engineering, October 12-17, 2008, Beijing, China.
[18] Seismocare (1998) Seismocare Computed Aided Reduction of Seismic Risk with application to existing cities, town planning and construction - Directions to fill in the vulnerability form GNDT levels 1 and 2. European project Environment and Climate, 1994–1998, ENV4-CT97–0588.
[19] CGS (2003) Algerian seismic code RPA99/VERSION 2003, National Earthquake Engineering Centre (CGS), Algiers.
[20] Guéguen P, Michel C, LeCorre L (2007), “A simplified approach for vulnerability assessment in moderate-to- low seismic hazard regions: application to Grenoble (France)”, Bull Earthq Eng 5(3):467–490. doi:10.1007/ s10518-007-9036-3.