Assoc. Prof. Serdar Soyoz

Boğaziçi Üniversitesi
Department of Civil Engineering
Bebek, Istanbul, Turkey
serdar.soyoz@boun.edu.tr
+90 (212) 359 7788


What is Structural Health Monitoring?

    Structural Health Monitoring (SHM) enables engineers to identify the actual dynamic characteristics of structures such as modal frequencies, shapes and damping ratios. System identification may be carried out by processing ambient, wind or earthquake response (mostly acceleration data) in time or frequency domain. Obtaining actual dynamic parameters is crucial in Finite Element Updating procedure and consequently estimating more reliable structural response. In the last decades, engineers are capable of improving design codes based on identification results.

      Seismic responses of structures are also examined and valuable information about soil-structure interaction, nonlinear behavior of structural elements, excitation of higher modes and interaction of structural and non-structural elements are obtained by analyzing the vibration data collected during seismic events.

      Furthermore, SHM techniques can be adopted for seismic risk assessments due to its capability of eliminating the uncertainties in structural parameters. Vulnerability curves, which demonstrate the failure probability of a structure under seismic events, may be generated analytically or experimentally.


Projects
Zorlu Center Bridge Crupe Crupe
Historical Building Golden Horn Eta Building

Assoc. Prof. Serdar Soyoz
Email: serdar.soyoz@boun.edu.tr
Phone: +90 (212) 359 7788

Education:
PhD in Civil Engineering, University of California, Irvine, U.S. 2007
MS in Civil Engineering, Middle East Technical University, Turkey 2004
BS in Civil Engineering, Middle East Technical University, Turkey 2001

Research Interests:
Structural Health Monitoring
Earthquake Engineering
Wind Turbine Analysis/Design
Structural Dynamics
Structural Reliability
Structural Control

Experience
Assoc. Prof. Dr 09/14-current Bogazici University, Turkey
Asst. Prof. Dr 03/10-09/14 Bogazici University, Turkey, Turkey
Senior Staff Engineer 03/08-03/10 MMI Engineering, U.S.
Postdoctoral Scholar 09/07-03/08 University of California Irvine, U.S.
Visiting Researcher 08/02-08/03 International Institute of Seismology and
Earthquake Engineering / Keio University, Japan

PAPERS
J.8 Ozer E., Soyoz S. (2013) “Vibration-based Damage Detection and Seismic Performance Assessment of Bridges”, Earthquake Spectra, accepted
J.7 Soyoz S., Taciroglu E., Orakcal K., Nigbor R., Skolnik D., Lus H., Safak E. (2013) Ambient and Forced vibration testing of a Reinforced Concrete Building Before and After its Seismic Retrofitting, Journal of Structural Engineering, ASCE, 139(10), 1741-1752.
J.6 Soyoz S., Aydın C. (2013) “Effect of Higher Wave Harmonics on the Response of Monopile Type Offshore Wind Turbines”, Journal of Wind Energy, 16(8), 1277-1286
J.5 Soyoz S., Feng M.Q., Shinozuka M. (2010) “Structural Reliability Estimation with Vibration-based Identified Parameters” Journal of Engineering Mechanics, ASCE, 136 (1), 100-106.
J.4 Firazzarin M., Feng M.Q., Franchetti P., Soyoz S., Modena C. “Damage Detection Based on Damping Analysis of Ambient Vibration Data” Structural Control and Health Monitoring, 17(4), 368-385.
J.3 Soyoz S., Feng M.Q. (2009) “Long-term Monitoring and Identification of Bridge Structural Parameters” Computer-Aided Civil and Infrastructure Engineering, 24(2): 82-92.
J.2 Chen Y., Feng M. Q., Soyoz S. (2008) “Large-Scale Shake Table Test Verification of Bridge Condition Assessment Methods” Journal of Structural Engineering, ASCE, 134(7):1235-1245.
J.1 Soyoz S., Feng M.Q. (2008) “Instantaneous Damage Detection of Bridge Structures and Experimental Verification” Structural Control and Health Monitoring, 15(7): 958-973.

STUDENTS

PHD
1. Orçun Tokuç, Structural Health Monitoring of Industrial Chimneys, on-going.
2. Cem Yılmaz, Base Isolation Systems, on-going

MS

1.Emre Aytulun, TBA
2.Yavuz Altuğ, TBA
3.Korkut Kaynardağ, Structural Health Monitoring of Tall Building , 2016
3.Hüseyin Çolak, Structural Health Monitoring Condition Assessment and Seismic Vulnerability Estimation of Highway Bridges, 2016
4.Oğuz Şenkardeşler, Effects of Uncertainties in Probabilistic Seismic Hazard Analysis on Response of a Tall Building, 2016
5.Sarper Saygı, Seismic Loss Estimation, on-going.
6.Burak Karabulut, Cold-formed Steel Structures, on-going.
7.Münir Yeşiltaş, Structural Health Monitoring of Bridges, on-going.
8.Orhan Gençtürk, Seismic Analysis of Onshore Wind Turbines, on-going.
9.Erdinç Kırkpınar, Structural Health Monitoring of Tall Building ,2013
10.Ziya Dalkılıç, Ambient and Forced Vibration Testing of a Building, 2013
11.Onur Kalan, Fatigue Analysis of Onshore Wind Turbines, 2013.
12.Furkan Çelenli, Effect of Traffic Loading on Modal Parameters of Bridges, 2012.
13.Ekin Özer, Vibration-based Damage Detection and Seismic Performance Assessment, 2012.
14.Can Aydın, Analysis of Offshore Wind Turbines under Wind and Wave Loading, 2011.

COURSES

UNDERGRADUATE

Mechanics 10F, 11F
Strength of Materials 11S
Structural Analysis 12F

GRADUATE

Structural Health Monitoring 10 S, 11S, 12S
Structural Dynamics 10F
Structural Reliability 11F, 12F
Earthquake Engineering 12S, 13S

PROJECTS

ACADEMIC

1. Health Monitoring of Reinforced Concrete Bridges, PI, TUBITAK, on-going.
2. Structural Health Monitoring of a Tall Buildings, PI, BAP, on-going.
3.Founding of Civil Engineering Structural Health Monitoring Laboratory, PI, BAP, 2011.
4.Off-shore Wind Turbine Applications in the U.S. Atlantic Ocean, Member, NREL, 2009.
5.Vibration-Based Identification and FEM Updating of an Off-shore Platform, Co-PI, SHELL, 2008.
6.Utilization of Strong Motion Data for Toll Bridge Damage Assessment, Member, CALTRANS, US, 2007.
7.Long-term Structural Performance Monitoring of Bridges, Member, CALTRANS, US, 2006.

CONSULTING

1.Seismic Performance Assessment of 12-storey RC Building in Suadiye, Turkey, 2012.
2.Response Measurement of Golden Horn Bridge Bearings, Turkey, 2012.
3.Performance Assessment of a Historical Masonary Building in Kadıköy, Turkey, 2013.
4.Large-scale Cyclic and Dynamic Tests of a Cold Formed Steel Structure, Turkey, 2014.

Korkut Kaynardağ
Email: korkut.kaynardag@boun.edu.tr
Phone: +90 (212) 359 7788
Mobile: +90 (553) 432 95 14

Education:
MS in Civil Engineering, Boğaziçi University, Turkey 2013-2016
MS in Civil Engineering (Erasmus Exchange Program), Czech Technical University, Czech Republic 2012-2013
BS in Civil Engineering, Boğaziçi University, Turkey 2013

Research Interests:
Structural Health Monitoring
Earthquake Engineering
Wind Turbine Analysis/Design
Structural Dynamics
Structural Reliability
Structural Control

Experience
Resarch and Teaching Assistant 01/14-current Bogazici University, Turkey
Office Internship 03/10-09/14 Bogazici University, Turkey, Turkey
Senior Staff Engineer 03/08-03/10 MMI Engineering, U.S.
Postdoctoral Scholar 09/07-03/08 University of California Irvine, U.S.
Visiting Researcher 08/02-08/03 International Institute of Seismology and
Earthquake Engineering / Keio University, Japan

PAPERS
J.8 Ozer E., Soyoz S. (2013) “Vibration-based Damage Detection and Seismic Performance Assessment of Bridges”, Earthquake Spectra, accepted
J.7 Soyoz S., Taciroglu E., Orakcal K., Nigbor R., Skolnik D., Lus H., Safak E. (2013) Ambient and Forced vibration testing of a Reinforced Concrete Building Before and After its Seismic Retrofitting, Journal of Structural Engineering, ASCE, 139(10), 1741-1752.
J.6 Soyoz S., Aydın C. (2013) “Effect of Higher Wave Harmonics on the Response of Monopile Type Offshore Wind Turbines”, Journal of Wind Energy, 16(8), 1277-1286
J.5 Soyoz S., Feng M.Q., Shinozuka M. (2010) “Structural Reliability Estimation with Vibration-based Identified Parameters” Journal of Engineering Mechanics, ASCE, 136 (1), 100-106.
J.4 Firazzarin M., Feng M.Q., Franchetti P., Soyoz S., Modena C. “Damage Detection Based on Damping Analysis of Ambient Vibration Data” Structural Control and Health Monitoring, 17(4), 368-385.
J.3 Soyoz S., Feng M.Q. (2009) “Long-term Monitoring and Identification of Bridge Structural Parameters” Computer-Aided Civil and Infrastructure Engineering, 24(2): 82-92.
J.2 Chen Y., Feng M. Q., Soyoz S. (2008) “Large-Scale Shake Table Test Verification of Bridge Condition Assessment Methods” Journal of Structural Engineering, ASCE, 134(7):1235-1245.
J.1 Soyoz S., Feng M.Q. (2008) “Instantaneous Damage Detection of Bridge Structures and Experimental Verification” Structural Control and Health Monitoring, 15(7): 958-973.

STUDENTS

PHD
1. Orçun Tokuç, Structural Health Monitoring of Industrial Chimneys, on-going.
2. Cem Yılmaz, Base Isolation Systems, on-going

          Hüseyin Çolak

      Huseyin Colak started his Master’s Degree in structural engineering right after that he obtained his Bachelor Degree from Bogazici University in the summer 2013. Currently he is a Research Assistant and his research topic is the Structural Health Monitoring. The Etiler Bridge project is carried out by him. He is also interested in the Earthquake Engineering and Soil-Structure Interaction topics.

      Conference Proceeding Colak C., Soyoz S. (2014). Vibration Based Damage Detection of Bridges under Incoherent Input Motions. 15th European Conference on Earthquake/Istanbul, Turkey

        E-mail: huseyin.colak@boun.edu.tr

        Oğuz Şenkardeşler

      Oğuz Şenkardeşler graduated from Boğaziçi University in 2013 and he is a graduate student in Boğaziçi University. He is responsible of CRUPE Tests and he completed a study about seismic reliabilty estimation of a historical structure. He interested in topics such as: structural health monitoring and structural dynamics. During his assistantship he focused on experimental studies about 3-D multi-storey light-gauge steel structures with and without infill materials.

      Conference Proceeding Senkardesler O., Soyoz S. (2014). Vibration Based Finite Element Updating and Seismic Reliability Estimation of a Historical Building in Istanbul. 15th European Conference on Earthquake/Istanbul, Turkey

        E-mail: oguz.senkardesler@boun.edu.tr

Levent 199 Real-Time Monitoring

The sensors in x direction are displayed. X axes show 10 seconds time inverval.

PLEASE WAIT A FEW SECONDS UNTIL DATA IS LOADED...       

-6th floor.

Entrance floor.

10th floor.

20th floor.

30th floor.

40th floor.

CRUPE Tests & Light-Gauge Steel Panel Tests

      Series of tests on 3-D full-scale two-storey structures are carried out in Structures Laboratory. Structures are made of light-gauge steel and one of two specimens was infilled with insulation material. During experiments dynamic properties of specimens such as mode frequencies & shapes, damping ratios are determined with dynamic tests. Dynamic tests include ambient vibration tests and forced-vibration test with the help of a eccentric mass shaker. Cyclic tests are also carried out on specimens and capacities, stiffnesses and ductility ratios are determined. In the upcoming days prefabricated light-gauge steel panels are also started to be tested in laboratory.

Seismic Reliability Estimation of a Historical Building with Ambient Vibration Survey

      Seismic reliablity estimation of a historical building in Istanbul is made based on ambient vibration data. According to material tests and drawings a finite element model is constructed. In the light of system identification results, constructed finite element model is updated and time history analyses for 12 different earthquake records are carried out. From results obtained in time history analyses, seismic reliability estimation of the structure is made.