Institute of engineering seismology and earthquake engineering

11 st meeting of meeting of EAEE Task group EAEE Task group TG11: Seismic Design Assessment and Retrofit of Bridges11 meeting of meeting of EAEE Task group EAEE Task group TG11: Seismic

11 st meeting of meeting of EAEE Task group EAEE Task group TG11: Seismic Design Assessment and Retrofit of Bridges

11 meeting of meeting of EAEE Task group EAEE Task group TG11: Seismic Design, Assessment, and Retrofit of Bridges

Saturday 16 June 2007, Rethymno Saturday 16 June 2007, Rethymnon n, Greece , Greece

Institute of Engineering Seismology and

Earthquake Engineering (ITSAK)

Earthquake Engineering (ITSAK)

Ch Karakostas, Senior Researcher

www.itsak.gr

ITSAK ITSAK Short profile Short profile

ƒƒ Multi Multi disciplinary Public Research Institute under the auspices of the Greek disciplinary Public Research Institute under the auspices of the Greek Ministry of Environment, Urban Planning and Public Works

ƒƒ Based in Thessaloniki, Greece

ƒƒ Divisions :

Earthquake Engineering Earthquake Engineering g g g g

Soil Dynamics Soil Dynamics

Engineering Seismology Engineering Seismology

Laboratory Laboratory

Administration Administration

ƒƒ 13 researchers (all with doctorate’s degree)

ƒƒ 20 administrative 20 administrative –– technical staff 20 administrative 20 administrative technical staff technical staff technical staff

ITSAK

ITSAK Short profile Short profile

INSTRUMENTATION OF BRIDGES IN GREECE

CABLE STAYED BRIDGE STAYED BRIDGE

ON EVRIPOS CHANNEL

ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ EVRIPOS BRIDGE

ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ - ΔΙΑΤΑΞΗ ΕΝΟΡΓΑΝΩΣΗΣ EVRIPOS BRIDGE – INSTRUMENTATION LAYOUT

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)

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 ΙΔΙΟΜΟΡΦΙΚΕΣ ΠΑΡΑΜΕΤΡΟΙ

Identified Modal Parameters

2-output / Quasi Newton gradient-based

2-output /

Υβριδικός γενετικός αλγόριθμος

4-output /

Υβριδικός γενετικός αλγόριθμος

Ιδιοπερίοδος Ιδιοπερίοδος Ιδιοπερίοδος

Mode

Ιδιομορφή Ιδιοπερίοδος (sec) ζ (%) Ιδιοπερίοδος (sec) ζ (%) Ιδιοπερίοδος (sec) ζ (%)

1 - - 1.1172 * 1.1344 0.9556 1.1644 1.1172 * 1.5015

Period (sec)

Period (sec)

Period (sec) Mode

Quasi-Newton gradient-based :

Initial parameter estimation / Frequency range for optimization

Hybrid genetic algorithm :

Analytical model

Υβριδικός γενετικός αλγόριθμος :

Πεδίο διακύμανσης τιμών / Περιοχή συχνοτήτων για βελτιστοποίηση

Hybrid genetic algorithm :

Parameter value range / Frequency range for optimization

EVRIPOS BRIDGE – F.E model

EVRIPOS BRIDGE – Simulated response to earthquake from Atalanti fault

Display scale > 1 for viewing purposes

BRIDGES ON EGNATIA HIGHWAY

The Egnatia Motorway, Greece

22nd KAVALA RAVINE BRIDGE

22 nd Kavala bypass ravine bridge

INSTRUMENATION OF

22nd KAVALA RAVINE BRIDGE

200 20011 2003 2003

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

INSTRUMENATION OF

22nd KAVALA RAVINE BRIDGE

2004 2004 2007 2007

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

30 min recording

22 nd KAVALA RAVINE BRIDGE

Identified modal parameters (traffic excitation)

22 nd KAVALA RAVINE BRIDGE

22 nd KAVALA RAVINE BRIDGE

Identified vs analytical modeshape (Bending mode)

22 nd KAVALA RAVINE BRIDGE

Optimal estimates of FE model parameters

22 nd KAVALA RAVINE BRIDGE

Predicted

frequencies frequencies (Hz) (Hz)

Predicted frequencies (Hz)

Difference Difference (%) (%)

22 nd KAVALA RAVINE BRIDGE

Optimal estimates of FE model parameters

22 nd KAVALA RAVINE BRIDGE

Ambient (traffic)

Design (earthquake)

G9 ( 9 (POLYMYLOS POLYMYLOS)) BRIDGE BRIDGE

G9 (Polymylos) Bridge

T1RT 100

M2 LL 10

M2RT 10 T3RT 100

G9 (Polymylos) Bridge

G9 (Polymylos) Bridge ( ( y y y y ) ) g g

G9 (Polymylos) Bridge

G9

(Polymylos) Bridge

30 min

di recording

G9 (Polymylos) Bridge

Τ=1.62 sec

Τ=0.89 sec

Elastomeric bearings ?

Vulnerability of Bridges y y g g

G9 (Polymylos) Bridge

Methodology proposed by Prof A Kappos (ASPROGE project)

G9 (Polymylos) Bridge

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

G9 (Polymylos) Bridge

E A K 2003 com patible

S am ple of G reek E arthquakes

Inelastic demand spectra used in the study

G9 (Polymylos) Bridge

Polymylos Bridge : (a) capacity curve and demand spectrum

(b) detail

G9 (Polymylos) Bridge

Fragility curves for Polymylos (G9) bridge (y

transverse direction, mean demand spectrum from EAK2003 elastic direction, mean demand spectrum from EAK2003 elastic

spectrum).

Development of specialized F.E p p p p

F.E for thin

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

F.E for thin

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

Macroelements

F.E for thin

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

Eigenmodes

F.E for thin

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

Eigenmodes

Infrastructure

20 channel K2 accelerometer array channel K2 accelerometer array

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

400 N electrodynamic shaker

50 kN ECCENTRIC MASS VIBRATOR

ECCENTRIC MASS VIBRATOR 16

16 channel accelerometer array channel accelerometer array

Laboratory for service and maintenance of equipment

Mobile instrumentation unit

Thank you !!!