Effect of out-of-plane behavior on seismic fragility of masonry buildings in Turkey

This study focuses on the evaluation of seismic safety of unreinforced masonry buildings in Turkey by using fragility curves generated for two behavior modes of load bearing walls: in-plane and out-of-plane. During generation of fragility curves, a force-based approach has been used. There exist two limit states in terms of base shear strength for in-plane behavior mode and flexural strength for out-of-plane behavior mode. To assess the seismic vulnerability of unreinforced masonry buildings in Turkey, fragility curves generated for in-plane behavior were verified by the observed damage during the 1995 Dinar (Turkey) earthquake and fragility curves generated for out-of-plane behavior were verified by the observed damage during the 2010 Elazığ (Turkey) earthquake. The verification results reveal that the proposed fragility-based procedure can provide an alternative for the seismic safety evaluation of unreinforced masonry buildings in Turkey. Using this procedure, it becomes possible to investigate a large population of masonry buildings located in regions of high seismic risk in a short period of time. The obtained results are valuable in the sense that they can be used as a database during the development of strategies for pre-earthquake planning and risk mitigation for earthquake prone regions of Turkey.

[1]  BrianS-J. Chiou,et al.  An NGA Model for the Average Horizontal Component of Peak Ground Motion and Response Spectra , 2008 .

[2]  E. Zor,et al.  Crustal Attenuation within the Turkish Plateau and Surrounding Regions , 2005 .

[3]  Gianmarco De Felice,et al.  Out‐of‐plane seismic behaviour of rocking masonry walls , 2012 .

[4]  Hugo Bachmann,et al.  ON THE SEISMIC VULNERABILITY OF EXISTING UNREINFORCED MASONRY BUILDINGS , 2003 .

[5]  M. Fardis,et al.  Designer's guide to EN 1998-1 and en 1998-5 Eurocode 8: Design of structures for earthquake resistance; general rules, seismic actions, design rules for buildings, foundations and retaining structures/ M.Fardis[et al.] , 2005 .

[6]  G. Atkinson,et al.  Ground-Motion Prediction Equations for the Average Horizontal Component of PGA, PGV, and 5%-Damped PSA at Spectral Periods between 0.01 s and 10.0 s , 2008 .

[7]  Richard J. Beckman,et al.  A Comparison of Three Methods for Selecting Values of Input Variables in the Analysis of Output From a Computer Code , 2000, Technometrics.

[8]  Barry J. Goodno,et al.  Seismic fragility analysis of low-rise unreinforced masonry structures , 2009 .

[9]  G. Housner.  The behavior of inverted pendulum structures during earthquakes , 1963 .

[10]  H Y Kim,et al.  STATISTICAL ANALYSIS OF FRAGILITY CURVES , 2000 .

[11]  M. Altug Erberik,et al.  Generation of fragility curves for Turkish masonry buildings considering in‐plane failure modes , 2008 .

[12]  Yi-Kwei Wen,et al.  Vulnerability Function Framework for Consequence-based Engineering , 2004 .

[13]  Kenneth J. Elwood,et al.  Assessment of ASCE 41 Height-to-Thickness Ratio Limits for URM Walls , 2007 .

[14]  Nicos Makris,et al.  The rocking spectrum and the limitations of practical design methodologies , 2003 .

[15]  L. F. Restrepo-V élez.  Experimental testing in support of a mechanics-based procedure for the seismic risk evaluation of unreinforced masonry buildings , .

[16]  Can Celalettin Simsir,et al.  Influence of Diaphragm Flexibility on the Out -of -Plane Dynamic Response of Unreinforced Masonry Walls , 2004 .

[17]  Polat Gülkan,et al.  8 March 2010 Elazığ-Kovancılar (Turkey) Earthquake: Observations on Ground Motions and Building Damage , 2011 .

[18]  T. Paulay,et al.  Seismic Design of Reinforced Concrete and Masonry Buildings , 1992 .

[19]  Nelson Lam,et al.  Displacement-based seismic analysis for out-of-plane bending of unreinforced masonry walls , 2002 .

[20]  D. D’Ayala,et al.  Force and Displacement Based Vulnerability Assessment for Traditional Buildings , 2005 .

[21]  G. Magenes,et al.  SIMPLIFIED PROCEDURE FOR THE SEISMIC RISK ASSESSMENT OF UNREINFORCED MASONRY BUILDINGS , 2002 .

[22]  G. Magenes,et al.  EVALUATION OF OUT-OF-PLANE STABILITY OF UNREINFORCED MASONRY WALLS SUBJECTED TO SEISMIC EXCITATION , 2003 .