ITSAK - Short profile Multi-disciplinary Public Research Institute under the auspices of the Greek Ministry of Environment, Urban Planning and Public

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Ἕκτωρ Κεδίκογλου
6 χρόνια πριν
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1 1 st meeting of EAEE Task group TG11: Seismic Design, Assessment, and Retrofit of Bridges Saturday 16 June 2007, Rethymnon, Greece Institute of Engineering Seismology and Earthquake Engineering (ITSAK) Ch. Karakostas, Senior Researcher

2 ITSAK - Short profile Multi-disciplinary Public Research Institute under the auspices of the Greek Ministry of Environment, Urban Planning and Public Works Based in Thessaloniki, Greece Divisions : - Earthquake Engineering - Soil Dynamics - Engineering Seismology - Laboratory - Administration 13 researchers (all with doctorate s degree) 20 administrative technical staff

3 ITSAK - Short profile

4 INSTRUMENTATION OF BRIDGES IN GREECE

5 CABLE-STAYED BRIDGE ON EVRIPOS CHANNEL

6 ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ EVRIPOS BRIDGE

7 ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ - ΔΙΑΤΑΞΗ ΕΝΟΡΓΑΝΩΣΗΣ EVRIPOS BRIDGE INSTRUMENTATION LAYOUT

8 ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ ΣΕΙΣΜΟΣ 4/1997 (M w =4.5, 50 km ΝΑ) EVRIPOS BRIDGE EARTHQUAKE OF 4/97 (M W =4.5, 50 km SE) MEASUREMENTS ΣΥΓΚΡΙΣΗ ΚΑΤΑΓΡΑΦΩΝ vs MODAL MODEL MODAL PREDICTIONS MODEL Time domain Πεδίο χρόνου Frequency Πεδίο συχνοτήτων domain

9 ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ / ΣΕΙΣΜΟΣ 4/1997 (M w =4.5, 50 km ΝΑ) EVRIPOS BRIDGE EARTHQUAKE OF 4/97 (M W =4.5, 50 km SE) ΑΝΑΓΝΩΡΙΣΜΕΝΕΣ Identified Modal ΙΔΙΟΜΟΡΦΙΚΕΣ ParametersΠΑΡΑΜΕΤΡΟΙ Ιδιομορφή Mode 2-output t / 2-output t / 4-output t / Quasi Newton Υβριδικός γενετικός Υβριδικός γενετικός Hybrid genetic Hybrid genetic gradient-based αλγόριθμος αλγόριθμος Ιδιοπερίοδος Period Ιδιοπερίοδος Period Ιδιοπερίοδος Period ζ (%) ζ (%) (sec) (sec) (sec) ζ (%) * * Quasi-Newton Gradient-based gradient-based : : Initial Αρχικές parameter εκτιμήσεις estimation παραμέτρων / Frequency / Περιοχή range συχνοτήτων for optimization για βελτιστοποίηση * : Analytical Αναλυτικό προσομοίωμα model Hybrid Υβριδικός genetic γενετικός algorithm αλγόριθμος : : Parameter Πεδίο διακύμανσης value range τιμών / Frequency / Περιοχή range συχνοτήτων for optimization για βελτιστοποίηση

10 EVRIPOS BRIDGE F.E. model

11 EVRIPOS BRIDGE Simulated response to earthquake from Atalanti fault Display scale > 1 for viewing purposes

12 BRIDGES ON EGNATIA HIGHWAY

13 The Egnatia Motorway, Greece

14 2 nd KAVALA RAVINE BRIDGE

15 2 nd Kavala bypass ravine bridge

16 INSTRUMENATION OF nd KAVALA RAVINE BRIDGE 2 nd

17 2 nd KAVALA RAVINE BRIDGE Moving Sensors Moving Sensors Reference Sensors Moving Sensors : Vertical Sensor : Longitutinal ti Sensor : Transverse Sensor

18 2 nd KAVALA RAVINE BRIDGE

19 2 nd KAVALA RAVINE BRIDGE

20 INSTRUMENATION OF nd KAVALA RAVINE BRIDGE 2 nd

21 2 nd KAVALA RAVINE BRIDGE

22 2 nd KAVALA RAVINE BRIDGE

23 2 nd KAVALA RAVINE BRIDGE

24 2 nd KAVALA RAVINE BRIDGE

25 2 nd KAVALA RAVINE BRIDGE

26 2 nd KAVALA RAVINE BRIDGE 30 min recording

27 2 nd KAVALA RAVINE BRIDGE Identified modal parameters (traffic excitation) Mode Eigenfrequencies (Hz) Damping ζ (%) 1 st st transverse st longitudinal st rot. z-axe nd nd transverse st bending nd bending rd bending

28 2 nd KAVALA RAVINE BRIDGE

29 2 nd KAVALA RAVINE BRIDGE Identified vs. analytical modeshape (Bending mode) Mode 1 Δεξιά Σημεία Μέτρησης Αριστερά Σημεία Μέτρησης sec sec Experimental and analytical l results not in satisfactory t agreement Updating of F.E. Model needed

30 2 nd KAVALA RAVINE BRIDGE Optimal estimates of FE model parameters Parameter Initial Estimate Optimal Estimate θ 1 (deck) θ 2 (bearings A2) θ 3 (bearings A1) θ 4 (piers M1, M3) θ 5 (pier M2) θ 6 (bearings M1, M3) θ 7 ( bearings M2)

31 2 nd KAVALA RAVINE BRIDGE Mode Measured frequencies (Hz) Predicted frequencies (Hz) Difference (%) 1 st st transverse st longitudinal st rot. z-axe nd nd transverse st bending nd bending rd rd bending

0 7.7926 θ 3 (bearings A1) 1.0 6.8228 θ 4 (piers M1, M3) 1.0 10 1.

32 2 nd KAVALA RAVINE BRIDGE Optimal estimates of FE model parameters Parameter Initial Estimate Optimal Estimate θ 1 (deck) θ 2 (bearings A2) θ 3 (bearings A1) θ 4 (piers M1, M3) θ 5 (pier M2) θ 6 (bearings M1, M3) θ 7 ( bearings M2)

33 2 nd KAVALA RAVINE BRIDGE Ambient (traffic) Design (earthquake)

34 G9 (POLYMYLOS) BRIDGE

35 G9 (Polymylos) Bridge

36 G9 (Polymylos) Bridge

37 G9 (Polymylos) Bridge

38 G9 (Polymylos) Bridge

39 G9 (Polymylos) Bridge Instrumentation Layout B2RV 40 M2RV 10 A2RV40 T3RT 100 M2RT 10 B2RT 40 A2RT 40 SRV 100 T1RT 100 U3LL100 U3LV 100 U3RT 100 ΠΟΛΥΜΥΛΟΣ M2 LL 10 M2LV 10 B2LV 40 A2LV 40 U2LV 40 Βάση Πυλώνα M2 SLV 100 SRT 100 U1LL 100 U1LV 100 U1RT 100 Aκρόβαθρο T2 30m 35m U2LT 40 U2LL 40 35m 30m Aκρόβαθρο T1

40 G9 (Polymylos) Bridge

41 G9 (Polymylos) Bridge

42 G9 (Polymylos) Bridge

43 G9 (Polymylos) Bridge 30 min recording

44 G9 (Polymylos) Bridge Identified modal parameters (traffic excitation) Mode Eigenfrequencies (Hz) Damping ζ (%) 1 st st transverse st longitudinal st rot. z-axe nd nd transverse st bending nd bending rd bending

45 G9 (Polymylos) Bridge

46 G9 (Polymylos) Bridge Τ=1.62 sec Τ=0.89 sec Elastomeric bearings?

47 G9 (Polymylos) Bridge Τ=0.89 sec Τ=0.85 sec Τ=0.84 sec Τ=0.83 sec Τ=0.47 sec Τ=0.49 sec Recording Analytical

48 Vulnerability of Bridges

49 G9 (Polymylos) Bridge Methodology proposed by Prof. A. Kappos (ASPROGE project)

50 G9 (Polymylos) Bridge

51 G9 (Polymylos) Bridge Polymylos bridge, transverse direction: (a) FEM model (b) pushover curve

52 G9 (Polymylos) Bridge EAK2003 compatible Sample of Greek Earthquakes Inelastic demand spectra used in the study

53 G9 (Polymylos) Bridge Polymylos Bridge : (a) capacity curve and demand spectrum (b) detail

54 G9 (Polymylos) Bridge Fragility curves for Polymylos (G9) bridge (y -transverse- direction, mean demand spectrum from EAK2003 elastic spectrum).

55 Development of specialized F.E.

56 F.E. for thin-wall beam-like substructures

57 F.E. for thin-wall beam-like substructures Macroelements

58 F.E. for thin-wall beam-like substructures Eigenmodes

59 F.E. for thin-wall beam-like substructures Eigenmodes

60 Infrastructure

61 20-channel K2 accelerometer array

62 16-channel high-sensitivity vibraphone system for ambient vibrations

63 400 N electrodynamic shaker

64 50 kn ECCENTRIC MASS VIBRATOR

65 ECCENTRIC MASS VIBRATOR 16-channel accelerometer array

66 Laboratory for service and maintenance of equipment

67 Mobile instrumentation unit

68 Mobile instrumentation unit

69 Thank you!!!

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