1st meeting of EAEE Task group TG11: Seismic Design Design, Assessment Assessment, and Retrofit of Bridges Saturday 16 June 2007, Rethymnon Rethymnon, Greece Institute of Engineering Seismology and Earthquake Engineering (ITSAK) Ch Karakostas, Senior Researcher www.itsak.gr ITSAK - Short profile MultiMulti-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 g g - Soil Dynamics - Engineering Seismology - Laboratory - Administration 13 researchers (all with doctorate’s degree) 20 administrative – technical staff ITSAK - Short profile INSTRUMENTATION OF BRIDGES IN GREECE CABLE-STAYED BRIDGE CABLEON EVRIPOS CHANNEL ΓΕΦΥΡΑ EVRIPOSΕΥΡΙΠΟΥ BRIDGE ΓΕΦΥΡΑ BRIDGE ΕΥΡΙΠΟΥ - ΔΙΑΤΑΞΗ ΕΝΟΡΓΑΝΩΣΗΣ EVRIPOS – INSTRUMENTATION LAYOUT 50 km ΝΑ) ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ – ΣΕΙΣΜΟΣ OF 4/1997 w=4.5, EVRIPOS BRIDGE – EARTHQUAKE 4/97(M (M W=4.5, 50 km SE) MEASUREMENTS vs MODAL MODEL PREDICTIONS ΣΥΓΚΡΙΣΗ ΚΑΤΑΓΡΑΦΩΝ – MODAL MODEL χρόνου TimeΠεδίο domain Πεδίο συχνοτήτων Frequency domain ΓΕΦΥΡΑ ΕΥΡΙΠΟΥ / ΣΕΙΣΜΟΣ 4/1997 50 km ΝΑ) w=4.5, EVRIPOS BRIDGE – EARTHQUAKE OF 4/97(M(M W=4.5, 50 km SE) ΑΝΑΓΝΩΡΙΣΜΕΝΕΣ ΙΔΙΟΜΟΡΦΙΚΕΣ Identified Modal ParametersΠΑΡΑΜΕΤΡΟΙ 2-output o t / Quasi Newton gradient-based Mode Ιδιομορφή Ιδιοπερίοδος Period (sec) ζ (%) - - 0.2923 0.2109 0.1894 0.1757 0.7151 2.6941 0.6642 0.9914 2-output o t / Υβριδικός γενετικός Hybrid genetic αλγόριθμος Period Ιδιοπερίοδος (sec) (sec) 1.1344 1.1172 * 0.2924 0.2114 0.1910 0.1755 ζ (%) 4-output o t / Υβριδικός γενετικός Hybrid genetic αλγόριθμος Period Ιδιοπερίοδος (sec) (sec) 0.9556 0.8194 1.9659 0.7439 0.8410 1.1644 1.1172 * 0.3618 0.2921 0.1811 0.1762 Quasi-Newton gradient-based : Gradient-based : Initial parameter estimation / Frequency rangeσυχνοτήτων for optimization Αρχικές εκτιμήσεις παραμέτρων / Περιοχή για βελτιστοποίηση Υβριδικός γενετικός αλγόριθμος : Hybrid genetic algorithm : Parameter value range / Frequency range for optimization Πεδίο διακύμανσης τιμών / Περιοχή συχνοτήτων για βελτιστοποίηση ζ (%) 1.5015 1.6149 0.8960 1.1464 0.3351 ** :Analytical Αναλυτικό προσομοίωμα model EVRIPOS BRIDGE – F.E model Development p of specialized p F.E F.E for thinthin-wall beambeam-like substructures F.E for thinthin-wall beambeam-like substructures Macroelements F.E for thinthin-wall beambeam-like substructures Eigenmodes F.E for thinthin-wall beambeam-like substructures Eigenmodes Infrastructure 20 channel K2 accelerometer array 20 16 channel high16 high-sensitivity vibraphone system for ambient vibrations 400 N electrodynamic shaker 50 kN ECCENTRIC MASS VIBRATOR ECCENTRIC MASS VIBRATOR 16 channel accelerometer array 16 Laboratory for service and maintenance of equipment Mobile instrumentation unit Mobile instrumentation unit Thank you !!! [...]... Σημεία Μέτρησης Mode 1 Αριστερά Σημεία Μέτρησης 1 2 3 4 5 6 7 8 9 1 3 4 5 6 7 8 9 10 0.282 sec 0.494 sec E Experimental i t l and d analytical l ti l results lt nott in i satisfactory ti f t agreementt Updating of F.E Model needed 2nd KAVALA RAVINE BRIDGE Optimal estimates of FE model parameters Parameter Initial Estimate Optimal Estimate θ1 (deck) 1.0 1.5550 θ2 (bearings A2) 1.0 7.7926 θ3 (bearings...EVRIPOS BRIDGE – Simulated response to earthquake from Atalanti fault Display scale > 1 for viewing purposes BRIDGES ON EGNATIA HIGHWAY The Egnatia Motorway, Greece 2nd KAVALA RAVINE BRIDGE 2nd Kavala bypass ravine bridge INSTRUMENATION OF 2nd KAVALA RAVINE BRIDGE 2001 200 1-2003 2nd KAVALA RAVINE BRIDGE Moving Sensors Moving Sensors Reference... KAVALA RAVINE BRIDGE Optimal estimates of FE model parameters Parameter Initial Estimate Optimal Estimate θ1 (deck) 1.0 1.5550 θ2 (bearings A2) 1.0 7.7926 θ3 (bearings A1) 1.0 6.8228 θ4 (piers M1 M1, M3) 1.0 10 1.4030 1 4030 θ5 (pier M2) 1.0 1.3514 θ6 (bearings M1, M3) 1.0 6.7420 θ7 ( bearings M2) 1.0 6.2160 2nd KAVALA RAVINE BRIDGE Ambient (traffic) Design (earthquake) G9 (POLYMYLOS (POLYMYLOS)) BRIDGE... Moving Sensors Moving Sensors Reference Sensors Moving Sensors : Vertical Sensor : Longitutinal L it ti l Sensor S : Transverse Sensor 2nd KAVALA RAVINE BRIDGE 2nd KAVALA RAVINE BRIDGE INSTRUMENATION OF 2nd KAVALA RAVINE BRIDGE 2004 2007 2004 2nd KAVALA RAVINE BRIDGE 2nd KAVALA RAVINE BRIDGE 2nd KAVALA RAVINE BRIDGE 2nd KAVALA RAVINE BRIDGE 2nd KAVALA RAVINE BRIDGE 2nd KAVALA RAVINE BRIDGE 30 min recording