Seismic Risk Assessment and Preliminary Intervention Cost-Benefit Analysis for the Building Stock of Istanbul

Cem Demir, Mustafa Comert, Hasan Huseyin Aydogdu, Alper Ilki*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

2 Citations (Scopus)

Abstract

Past destructive earthquakes in highly seismic areas of the world have shown that the failure of earthquake-prone buildings endangers the lives of the inhabitants and may cause enormous financial losses. Management of the seismic risks through effective mitigation efforts requires the identification of risky buildings in our cities. However, this is a challenging task, since the building stock is generally too huge to be investigated by using detailed seismic assessment methods provided by current technical documents. On the other hand, available quick assessment methods such as street surveys may lead to remarkably erroneous estimations, particularly if the building stock is composed of substandard buildings constructed without proper engineering service and inspection. Thus, reliable rapid assessment methodologies are required for seismic risk identification and classification of buildings in big cities. In the scope of a recent campaign launched by the Istanbul Metropolitan Municipality (IMM), PERA2019 rapid assessment methodology has been employed on more than 20000 buildings from 33 different districts of Istanbul. In this study, firstly, the preliminary results obtained for those buildings by considering a Scenario-Based Earthquake case are summarized. Then, a preliminary cost-benefit analysis considering the pre-earthquake and post-earthquake intervention costs (such as retrofitting, reconstruction and structural and non-structural damage repairs) together with the secondary costs (such as interruptions on the use of damaged buildings) have been performed and discussed. The obtained results indicate that a synchronized effort orchestrating rapid assessment methodologies and intervention strategies may provide feasible and effective solutions for reduction of seismic risks in big cities like Istanbul.

Original languageEnglish
Title of host publicationSpringer Proceedings in Earth and Environmental Sciences
PublisherSpringer Nature
Pages212-224
Number of pages13
DOIs
Publication statusPublished - 2022

Publication series

NameSpringer Proceedings in Earth and Environmental Sciences
ISSN (Print)2524-342X
ISSN (Electronic)2524-3438

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Funding

The authors of this paper wish to thank to Özlem Tut, Tayfun Kahraman and Sibel Özkan from Istanbul Metropolitan Municipality Department of Earthquake Risk Management and Urban Improvement. We are also grateful to scientific advisory committee members Mehmet Nuray Aydınoğlu, Zekai Celep, Ufuk Yazgan, Kutay Orakçal, Nusret Suna, Recep İyisan, Mustafa Erdik, Chamber of Civil Engineers Istanbul Branch and Turkish Earthquake Foundation. Valuable contributions of Kutay Orakcal, Mucip Tapan, Denizhan Ulugtekin and Nahit Kumbasar during the development of initial version of PERA method are highly acknowledged. The authors would like to thank to Selim Aydın, Mustafa Genç, Batuhan Guguk, Merve Yücelt, Orhun Biçer, Yusuf Uçarkuş, Doğu Can Uygur for their contributions.

FundersFunder number
Civil Engineers Istanbul Branch and Turkish Earthquake Foundation
Istanbul Metropolitan Municipality Department of Earthquake Risk Management and Urban Improvement
Mehmet Nuray Aydınoğlu

    Keywords

    • Cost-benefit
    • Earthquake
    • Mitigation
    • Rapid assessment

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