Non linear push over assessment of heritage buildings in Istanbul to define seismic risk

Dina D'Ayala, A Ansal

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The objectives of the Istanbul Seismic Risk Mitigation and Emergency Preparedness Project are to improve Istanbul's preparedness for a potential earthquake. Within this framework "Risk Assessment of Cultural Heritage Buildings" was designed to address the vulnerability of cultural assets, specifically buildings with global cultural heritage value. One of the components of the project was the vulnerability and risk assessment of 170 historical buildings. After a discussion of the choice of the most appropriate earthquake scenario, the methodology used for assessing the effects of local site conditions on the seismic performance of selected cultural heritage buildings is presented. The purpose is to estimate the earthquake characteristics on the ground surface based on the earthquake characteristics on the engineering bedrock outcrop obtained from the probabilistic and deterministic hazard studies. The site specific elastic design spectra for each site are then further manipulated to obtain site specific non linear displacement spectra, so that these can be directly compared with capacity curves for the buildings obtained by using plasticity based limit state analysis. The procedure for obtaining the capacity curves is described and the choice of the most appropriate level of ductility and the equivalent reduction coefficient are discussed. A procedure to evaluate performance points and to define safety factors based on lateral acceleration, drift or expected damage level, is presented. The process of arriving at a risk evaluation and hence recommendation for strengthening or otherwise, is finally highlighted with respect to two comparable case studies.
Original languageEnglish
Pages (from-to)285-306
Number of pages22
JournalBulletin of Earthquake Engineering
Volume10
Issue number1
DOIs
Publication statusPublished - Feb 2012

Fingerprint

Earthquakes
cultural heritage
earthquake
earthquakes
risk assessment
vulnerability
Risk assessment
Safety factor
ductility
safety factors
outcrops
Plasticity
emergencies
plasticity
Ductility
bedrock
curves
Hazards
outcrop
mitigation

Cite this

Non linear push over assessment of heritage buildings in Istanbul to define seismic risk. / D'Ayala, Dina; Ansal, A.

In: Bulletin of Earthquake Engineering, Vol. 10, No. 1, 02.2012, p. 285-306.

Research output: Contribution to journalArticle

@article{6a34685823db4bb79be08abea7b5329b,
title = "Non linear push over assessment of heritage buildings in Istanbul to define seismic risk",
abstract = "The objectives of the Istanbul Seismic Risk Mitigation and Emergency Preparedness Project are to improve Istanbul's preparedness for a potential earthquake. Within this framework {"}Risk Assessment of Cultural Heritage Buildings{"} was designed to address the vulnerability of cultural assets, specifically buildings with global cultural heritage value. One of the components of the project was the vulnerability and risk assessment of 170 historical buildings. After a discussion of the choice of the most appropriate earthquake scenario, the methodology used for assessing the effects of local site conditions on the seismic performance of selected cultural heritage buildings is presented. The purpose is to estimate the earthquake characteristics on the ground surface based on the earthquake characteristics on the engineering bedrock outcrop obtained from the probabilistic and deterministic hazard studies. The site specific elastic design spectra for each site are then further manipulated to obtain site specific non linear displacement spectra, so that these can be directly compared with capacity curves for the buildings obtained by using plasticity based limit state analysis. The procedure for obtaining the capacity curves is described and the choice of the most appropriate level of ductility and the equivalent reduction coefficient are discussed. A procedure to evaluate performance points and to define safety factors based on lateral acceleration, drift or expected damage level, is presented. The process of arriving at a risk evaluation and hence recommendation for strengthening or otherwise, is finally highlighted with respect to two comparable case studies.",
author = "Dina D'Ayala and A Ansal",
year = "2012",
month = "2",
doi = "10.1007/s10518-011-9311-1",
language = "English",
volume = "10",
pages = "285--306",
journal = "Bulletin of Earthquake Engineering",
issn = "1570-761X",
publisher = "Springer Netherlands",
number = "1",

}

TY - JOUR

T1 - Non linear push over assessment of heritage buildings in Istanbul to define seismic risk

AU - D'Ayala, Dina

AU - Ansal, A

PY - 2012/2

Y1 - 2012/2

N2 - The objectives of the Istanbul Seismic Risk Mitigation and Emergency Preparedness Project are to improve Istanbul's preparedness for a potential earthquake. Within this framework "Risk Assessment of Cultural Heritage Buildings" was designed to address the vulnerability of cultural assets, specifically buildings with global cultural heritage value. One of the components of the project was the vulnerability and risk assessment of 170 historical buildings. After a discussion of the choice of the most appropriate earthquake scenario, the methodology used for assessing the effects of local site conditions on the seismic performance of selected cultural heritage buildings is presented. The purpose is to estimate the earthquake characteristics on the ground surface based on the earthquake characteristics on the engineering bedrock outcrop obtained from the probabilistic and deterministic hazard studies. The site specific elastic design spectra for each site are then further manipulated to obtain site specific non linear displacement spectra, so that these can be directly compared with capacity curves for the buildings obtained by using plasticity based limit state analysis. The procedure for obtaining the capacity curves is described and the choice of the most appropriate level of ductility and the equivalent reduction coefficient are discussed. A procedure to evaluate performance points and to define safety factors based on lateral acceleration, drift or expected damage level, is presented. The process of arriving at a risk evaluation and hence recommendation for strengthening or otherwise, is finally highlighted with respect to two comparable case studies.

AB - The objectives of the Istanbul Seismic Risk Mitigation and Emergency Preparedness Project are to improve Istanbul's preparedness for a potential earthquake. Within this framework "Risk Assessment of Cultural Heritage Buildings" was designed to address the vulnerability of cultural assets, specifically buildings with global cultural heritage value. One of the components of the project was the vulnerability and risk assessment of 170 historical buildings. After a discussion of the choice of the most appropriate earthquake scenario, the methodology used for assessing the effects of local site conditions on the seismic performance of selected cultural heritage buildings is presented. The purpose is to estimate the earthquake characteristics on the ground surface based on the earthquake characteristics on the engineering bedrock outcrop obtained from the probabilistic and deterministic hazard studies. The site specific elastic design spectra for each site are then further manipulated to obtain site specific non linear displacement spectra, so that these can be directly compared with capacity curves for the buildings obtained by using plasticity based limit state analysis. The procedure for obtaining the capacity curves is described and the choice of the most appropriate level of ductility and the equivalent reduction coefficient are discussed. A procedure to evaluate performance points and to define safety factors based on lateral acceleration, drift or expected damage level, is presented. The process of arriving at a risk evaluation and hence recommendation for strengthening or otherwise, is finally highlighted with respect to two comparable case studies.

UR - http://www.scopus.com/inward/record.url?scp=80052548555&partnerID=8YFLogxK

UR - http://dx.doi.org/10.1007/s10518-011-9311-1

U2 - 10.1007/s10518-011-9311-1

DO - 10.1007/s10518-011-9311-1

M3 - Article

VL - 10

SP - 285

EP - 306

JO - Bulletin of Earthquake Engineering

JF - Bulletin of Earthquake Engineering

SN - 1570-761X

IS - 1

ER -