Earthquake risk assessment for Istanbul metropolitan area

Erdik, Mustafa; Aydinoğlu, Nuray; Fahjan, Yasin M.; Şeşetyan, Karin; Demircioğlu, M. B.; Siyahi, Bilge; Durukal, E.; Özbey, Cem; Biro, Yesim; Akman, H; Yüzügüllü, Ö.

doi:10.1007/bf02857534

Cited by 126 publications

(84 citation statements)

References 15 publications

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“…However, similar studies to those listed above have been performed for other cities throughout the world, including Lisbon, Portugal (D'Ayala et al, 1997;Ramos and Lourenco, 2004), Basel, Switzerland (Fah et al, 2001), Istanbul, Turkey (Erdik et al, 2003), Potenza, Italy (Dolce et al, 2006), San Francisco, USA (Kircher et al, 2006) and many others of various size and scope.…”

Section: Loss Assessment Studiesmentioning

confidence: 63%

Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings

2013

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Unreinforced masonry (URM) structures represent a significant portion of the residential building stock of the Central and Eastern United States (CEUSA), accounting for 15% of homes in the 8-state region impacted by the New-Madrid Seismic Zone and an even greater portion of the building stock in most other regions of the world. In addition to significant population, the brittle nature of URM buildings further supports a thorough consideration of seismic response given the susceptibility to severe failure modes. Currently, there is a pressing need for analytically based fragility curves for URM buildings. In order to improve the estimation of damage state probabilities through the development of simulation-based masonry fragilities, an extensive literature survey is conducted on pushover analysis of URM structures. Using this data, capacity diagrams are generated, from which damage exceedance limit states are defined.Demand is simulated using synthetically derived accelerograms representative of the CEUSA.Structural response is evaluated using an advanced capacity spectrum method developed at the Mid-America Earthquake Center. Capacity, demand, and response are thus derived analytically and response data is used to generate an improved and uniform set of fragility curves for use in loss-assessment software via a framework amenable to rapid expansion of pushover database and variation of ground motion records. A set of best practices is hereby developed for selection and use of experimental and analytical data, input ground motions, analysis of structural capacity, limit state definitions, seismic design categories, and probabilistic analysis methods. Curves are expressed in multiple forms for wide range of use in loss-assessment applications. Results are discussed and compared with other relationships developed in the literature, along with those generated using HAZUS opinion-based capacity data. The parameters of the improved fragility relationships developed and presented in this thesis are provided and suggested for reliable use in seismic loss assessment software.iii To my wife, Erin iv ACKNOWLEDGMENTS

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Section: Loss Assessment Studiesmentioning

confidence: 63%

Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings

2013

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“…Recent risk assessments estimate that there is a 70 per cent chance of a moment magnitude 7.0 or higher earthquake near Istanbul in the next 30 years (Ambraseys and Finkel, 1987;Erdik et al, 1985;Hubert-Ferrari et al, 2000;Parsons et al, 2000a;Parsons et al, 2000b). These studies indicate that this large earthquake would result in over 50,000 deaths due to heavily damaged and collapsed buildings, many of them under-designed, unauthorised housing (Erdik et al, 2003).…”

Section: Self-building Practices and Physical Vulnerabilitymentioning

confidence: 99%

Unauthorised development and seismic hazard vulnerability: a study of squatters and engineers in Istanbul, Turkey

Green

2008

Disasters

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“…In those cases where ''hımış'' houses were reported to have behaved poorly, the damage was often either triggered by the failure of masonry ground floor or initiated by non-structural masonry elements such as chimneys, or associated with lack of maintenance, material degradation, improper connections, and heavy roofs (e.g. see Erdik et al 2002a, b;Koçyigit et al 2002Ç ay Earthquake and Erdik et al 2003for 2003.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance evaluation of traditional timber Hımış frames: capacity spectrum method based assessment

Aktaş

Turer

2016

Bull Earthquake Eng

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Timber constructions have been widely suggested to be seismically resistant based on post-disaster reconnaissance studies. This observation has, however, remained to a large extent anecdotal due to the lack of experimental work supporting it, especially for certain timber architectural forms, including traditional timber frame ''hımış'' structures. To fill this gap, the authors carried out an extensive full-scale testing scheme using frames of various geometrical configurations, tested under reverse-cyclic lateral loading with/ without infill (brick and adobe) or cladding (bagdadi and şamdolma) (Aktas et al. in Earthq Spectra 30(4):1711-1732, 2014a, b). The tests concluded that hımış frames had high energy dissipation capabilities due mostly to nailed connections. Infill/cladding significantly helped improve stiffness and lateral load strength of the frames, and timber type did not seem to make a remarkable impact on the overall behaviour. The current paper, on the other hand, uses test data to calculate capacity/demand ratios based on capacity spectrum method and Eurocode 8 to elaborate more on the performance of ''hımış'' structures under seismic loading. The obtained results are discussed to draw important conclusions with regards to how frame geometry and infill/cladding techniques affect the overall performance.

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Earthquake risk assessment for Istanbul metropolitan area

Cited by 126 publications

References 15 publications

Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings

Simulation-Based Fragility Relationships for Unreinforced Masonry Buildings

Unauthorised development and seismic hazard vulnerability: a study of squatters and engineers in Istanbul, Turkey

Seismic performance evaluation of traditional timber Hımış frames: capacity spectrum method based assessment

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