DEVELOPMENT OF FRAGILITY CURVES FOR REINFORCED CONCRETE BUILDINGS

Esma Souki, Kamel Abdou, Youcef Mehani

Abstract


Introduction: Algeria has experienced numerous destructive earthquakes, resulting in significant loss of human lives, buildings, and equipment. To mitigate this risk, this study aims to quantify the potential damage to existing strategic buildings in the city of Constantine, located in the northeast of Algeria. Many of these buildings are old, designed and constructed during the colonial era before the implementation of the Algerian seismic code. Thus, they are required to be strengthened and retrofitted. Methods: The LM2 method, defined in RISK-UE (WP4), based on nonlinear static analysis and spectral response, is used to develop fragility curves. In this context, a structural system mainly consists of momentresisting reinforced concrete frames with partial infill walls. In this study, three types of strategic buildings are considered:
low-rise (two stories), mid-rise (four stories), and high-rise (six stories). The current Algerian seismic code RPA99/ version 2003 (MHUV 2003) is used to assess the seismic demand. As a result, capacity curves are developed for two primary directions: local and global behavior, identified according to the limits specified in FEMA 356/273 and ATC 40. Based on these results, fragility curves are generated, defining four damage states: slight, moderate, extensive, and complete in terms of spectral displacement.

Keywords


fragility curves; damage states; LM2 method; nonlinear static analysis; RC building

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References


Al-Nimry, H. (2019). Development of seismic fragility curves of RC infilled frame buildings in Jordan. MATEC Web of Conferences, Vol. 281, 01012. DOI: 10.1051/matecconf/201928101012.

Applied Technology Council (1996). ATC-40. Seismic evaluation and retrofit of concrete buildings. Redwood City: Applied Technology Council, 346 p, California, USA.

Barbat, A. H., Carreño, M. L., Pujades, L. G., Lantada, N., Cardona, O. D., Mabel, C., and Marulanda, M. C. (2010). Seismic vulnerability and risk evaluation methods for urban areas. A review with application to a pilot area. Structure and Infrastructure Engineering, Vol. 6, Issue 1–2, pp. 17–38. DOI: 10.1080/15732470802663763.

Barbat, A. H., Vargas, Y. F., Pujades, L. G., and Hurtado, J. E. (2012). Probabilistic assessment of the seismic damage in reinforced concrete buildings. In: Computational Civil Engineering – CCE2012. 43 International Symposium, May 25, 2012, Iasi, Romania, pp. 43–61.

Baylon, M. B., Sevilla, M. E. P., Cutora, M. D. L., Villa, R. M. S., Reynes, P. M. P., and Montemayor, J. M. V. (2023). Development of fragility curves for seismic vulnerability assessment: the case of Philippine General Hospital spine building. International Research Journal of Science, Technology, Education, and Management, Vol. 2, No. 4, pp. 1–11. DOI: 10.5281/zenodo.7559408.

Ministry of Housing and Urbanism, M.H.U.V., and National Center of Applied Research in Earthquake Engineering, C.G.S. (2003). Algerian Seismic Regulation, RPA 99 version 2003, D.T.R - B. C. 2.48 Algeria.

FEMA (1997). NEHRP guidelines for the seismic rehabilitation of buildings. FEMA 273. Washington, DC: FEMA, 435 p.

FEMA (2000). Prestandard and commentary for the seismic rehabilitation of buildings. FEMA 356. Washington, DC: FEMA, 518 p.

Fikri, R. and Ingham, J. (2022). Seismic response and aftershock fragility curves for non-ductile mid-rise buildings comprised of reinforced concrete frame with masonry infill. Structures, Vol. 45, pp. 1688–1700. DOI: 10.1016/j.istruc.2022.09.108.

Folić, R. and Čokić, M. (2021). Fragility and vulnerability analysis of an RC building with the application of nonlinear analysis. Buildings, Vol. 11, Issue 9, 390. DOI: 10.3390/buildings11090390.

DTR, B. C. 2.2 (1988). Dead loads and live loads. Edition of the National Center for Applied Research in Earthquake Engineering, C.G.S.

Hemsas, M. and Elachachi, S. M. (2007). Performance evaluation and analysis of the nonlinear behavior of reinforced concrete shear walls subjected to seismic action. 25th AUGC Meeting, p. 23-25.

Lantada, N., Irizarry, J., Barbat, A. H., Goula, X., Roca, A., Susagna, T., and Pujades, L. G. (2010). Seismic hazard and risk scenarios for Barcelona, Spain, using the Risk-UE vulnerability index method. Bulletin of Earthquake Engineering, Vol. 8, pp. 201–229. DOI: 10.1007/s10518-009-9148-z.

Mander, J. B., Priestley, M. J. N., and Park, R. (1988). Theoretical stress-strain model for confined concrete. Journal of Structural Engineering, Vol. 114, Issue 8, pp. 1804–1826. DOI: 10.1061/(ASCE)0733-9445(1988)114:8(1804).

Mehani, Y., Bechtoula, H., Kibboua, A., and Naili, M. (2013). Assessment of seismic fragility curves for existing RC buildings in Algiers after the 2003 Boumerdes earthquake. Structural Engineering and Mechanics, Vol. 46, No. 6, pp. 791–808. DOI: 10.12989/sem.2013.46.6.791.

Milutinovic, Z. V. and Trendafiloski, G. S. (2003).RISK-UE. An advanced approach to earthquake risk scenarios with applications to different European towns. Contract: EVK4-CT-2000-00014, WP4: Vulnerability of current buildings, p. 1-111. [online] Available at: http://www.civil.ist.utl.pt/~mlopes/conteudos/DamageStates/Risk%20UE%20WP04_Vulnerability.pdf [Date accessed: May 15, 2022].

Mouroux, P., Negulescu, C., and Belvaux, M. (2021). Practical comparison between displacement methods, leading to performance point and ductility demand, from ATC 40 (in damping) and Eurocode 8 (in ductility). Conference paper: January 2021, pp. 2-3.

Nagashree, B. K., Ravi Kumar, C. M., and Reddy, V. (2016). A parametric study on seismic fragility analysis of RC buildings. Earthquakes and Structures, Vol. 10, No. 3, pp. 629–643. DOI: 10.12989/eas.2016.10.3.629.

Nollet, M.-J., Karbassi, A., Lefebvre, K., and Chaallal, O. (2009). Development of fragility curves for existing buildings using the applied element method. 9th National Symposium on Structural Calculation. Giens, France, paper A3H91805.

Park, R., Priestley, M. J. N., and Gill, W. D. (1982). Ductility of square-confined concrete columns. Journal of the Structural Division, Vol. 108, Issue 4, pp. 929–950. DOI: 10.1061/JSDEAG.0005933.

DTR, B. (1993). BC 2-41: Design and calculation rule for Reinforced Concrete Structures „CBA 93”. Edition of the National Center for Applied Research in Earthquake Engineering, C.G.S. Approved by ministerial decree of, 165-167.

Roy, N., Paultre, P., and Proulx, J. (2007). Seismic evaluation and rehabilitation of reinforced concrete viaduct columns. Seismic Engineering and Structural Dynamics Research Center (CRGP). Sherbrooke University, Montreal.


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