Budak, Erhan
Seismic performance of a 253 m tall reinforced concrete core wall building in Istanbul, designed according to performance-based seismic design principles, was assessed to determine the response parameters that control the serviceability, safety and collapse performance limit states. An ambient vibration test of the building was performed to identify its dynamic properties, including the damping properties for service loads. A three- dimensional linear elastic finite element structural model of the building was developed and validated with the in-situ dynamic properties, which was the basis for the nonlinear finite element model developed subsequently. The collapse capacity of the building was determined using incremental dynamic analysis. Structure- and member-specific seismic fragility curves were derived and the performance of the building at various levels of earthquake hazard in the region was evaluated. The intensities and annual occurrence frequencies of earthquake ground motions leading to local and global collapse were calculated. The effects of the angle of seismic incidence on structural response and consequently on seismic fragilities were discussed. The findings of this study will further improve the understanding of the seismic performance of tall concrete core wall buildings with outrigger systems under different seismic hazard levels.


Response parameters that control the service, safety and collapse performances of a 253 m tall concrete core wall building in Istanbul
Budak, Erhan; Sucuoğlu, Haluk; Çelik, Ozan Cem (2022-10-01)
Seismic performance of a 253 m tall reinforced concrete core wall building constructed in Istanbul, designed according to performance-based seismic design principles, is assessed for determining the response parameters that control the serviceability, safety and collapse performance limit states. Serviceability performance is evaluated under the 50-year wind and 43-year earthquake whereas safety performance is assessed under the 2475-year earthquake. Collapse performance is elaborated through incremental dy...
Seismic collapse safety based optimization of steel Moment-Resisting frames
Gholizadeh, Saeed; Hasançebi, Oğuzhan; Eser, Hasan; Koçkaya, Okan (2022-11-01)
Structures must have a reasonable seismic safety margin in order to ensure life-safety as well as to prevent structural collapse caused by earthquakes. On the other hand, the cost-efficiency and economy of structures are important and integral parts of structural engineering. The main aim of the current study is to propose an efficient methodology for designing cost-efficient multi-story special steel moment-resisting frames at predefined levels of seismic collapse safety. To achieve this purpose, a seismic...
Performance Assessment of Turkish Residential Buildings for Seismic Damage and Loss Estimation
Un, Elif M.; Erberik, Murat Altuğ; Askan Gündoğan, Ayşegül (2015-04-01)
This study aims to present an integrated method in a probabilistic manner for seismic performance assessment of Turkish residential buildings, which can be used as a tool to estimate earthquake losses due to structural damage. In particular, the objective is to determine the performances of different types of residential buildings for predicting the potential seismic loss in terms of casualties (death toll) for a highly populated city in northwestern Turkey. The main phases of this study are seismic hazard,...
Forced Vibration Testing and Seismic Fragility Assessment of Instrumented Structures (FORAGAINST)
Çelik, Ozan Cem(2016-2-07)
The objectives of this proposed research are to perform forced vibration tests on the following reinforced concrete structures, which are permanently instrumented for recording their dynamic responses in the case of future earthquakes in Turkey: a four-story dormitory building in Bolu, a four-story office building in Istanbul, a five-story hospital building in Antakya, a three-story school building in Antakya, and a four-story university building in Izmir, and to derive seismic fragilities for these structu...
Seismic risk prioritization of residential buildings in Istanbul
Yakut, Ahmet; Sucuoğlu, Haluk (2012-09-01)
A large scale seismic risk prioritization study was conducted for medium-rise, gravity-designed reinforced concrete residential buildings in Istanbul. The implemented procedure was based on evaluating selected building parameters that could be easily observed or measured during a systematic sidewalk survey. The survey was actually conducted on approximately 100,000 buildings in the six subprovinces of Istanbul over the period 20042009 by a large team of trained surveyors. The collected data were processed t...
Citation Formats
E. Budak, “COLLAPSE FRAGILITY ANALYSIS OF REINFORCED CONCRETE TALL BUILDINGS,” Ph.D. - Doctoral Program, Middle East Technical University, 2022.