IABSE Symposium. Changes in Traffic Demand and Influence on the Lifetime of a 45 Years old Bridge. Chicago,

Transkript

1 IABSE Symposium Chicago, Changes in Traffic Demand and Influence on the Lifetime of a 45 Years old Bridge Helmut WENZEL

2 Traffic loads and volume has changed dramatically over time (+500%). New approaches are necessary to keep our infrastructure operating safely The assessment of structures requires information from monitoring data Decision Support Systems help to do this properly Scope

3 Europabrücke IABSE, Chicago, Sept. 2008

4 Progression of freight traffic volume at the Europabrücke from 1964 until 2015 [trucks/day] Effective amount of transported goods compared to a calculated cargo per notional truck Traffic volume in 2006 increased to an amount of 472 % in relation to 1964 and is expected to grow 2.9% per year until The truck weight in 2006 increased to an amount of 503 % in relation to 1964 and is assumed to have already reached a maximum. Freight Traffic - Situation

5 s early warning safety against failure 1 current practice today point of intervention failure time till intervention time y Early Warning, Point of Intervention

6 Cracks from Fatigue and Overload 6

7 sp02_214 sp02_221 sp02_223 sp02_225 sp02_227 sp02_228 sp02_230 Reduction of frequencies and amplitudes mv Full compression force Cable II released Cable II & IV released Cable II, IV & III released Cable II, IV, III & VI released Cable II, IV, III, VI & V released Reinforced Beam Hz :56:01 Frequency Development

8 Mode 19 Mode 5 VCE Damage Detection

9 2 IABSE, Chicago, Sept Cascade 5 Cascade 19 VCE Damage Detection

10 Weak Point Determination 10

11 MONITORING CAMPAIGN 11

12 1,22 BERGAUF_Lambda1^2/L^2...VollEingesp BERGAUF_Lambda3^2/L^2...NachgEingesp BERGAB_Lambda2^2/L^2...EingespGelenk Steifigkeits-Verhältniswert BERGAUF vs BERGAB BERGAUF_Lambda2^2/L^2...EingespGelenk BERGAB_Lambda1^2/L^2...VollEingesp BERGAB_Lambda3^2/L^2...NachgEingesp Schönberg 1,12 1,02 0,92 0,82 Pa tsch 0,72 0,62 0,52 0,42 Laufindex Diagonal-Streben 0, EXPECTED RESULTS FROM CALCULATION

13 59,5 54,5 Hz BERGAB BERGAUF Verlauf der Messwerte f1 49,5 44,5 39,5 34,5 29,5 24,5 Feld B Feld I Feld II Feld III Feld IV Feld V RESULTS OF THE MEASUREMENTS 13

14 0 Abweichung der Messwerte f1 von den Erwartungwerten f B 42 QV-N II 6-12 QV- II 56' QV-N % II 48' QV-N IV 6 QV-N -25 B 6 QV-N V48 QV- V24 QV-N Feld B Feld I Feld II Feld III Feld IV Feld V Weak Point Determination 14

15 VERIFICATION by STRAIN GAGES DMS - Profil (V30 QV-N und S) Sondermessung Mai 2007 Sensor: Spider 8_1 CH... Nummerierung nach Reihenfolge der Montage Richtung Brenner (N) Stationierung des Profils: x = 621m (entspricht 36m von WL Schönberg) Richtung Innsbruck (S) DMS_RFBB_o (...8) DMS_RFBI_o (...7) DMS_RFBB_mo (...1) DMS_RFBB_mu (...4) Lage der Dehnmessstreifen: DMS_RFBB_u (...6) DMS_RFBI_u (...5) DMS_RFBI_mo (...2) DMS_RFBI_mI (...9) DMS_RFBI_mB (...10) DMS_RFBI_mu (...3) RFBB_o... Richtungsfahrbahn Brenner, oberer Anschluss RFBB_mo... RFB Brenner, Strebenmitte, Oberseite RFBB_mu... RFB Brenner, Strebenmitte, Unterseite RFBB_u... RFB Brenner, Unterer Anschluss RFBI_o... Richtungsfahrbahn Innsbruck, oberer Anschluss RFBI_mo... RFB Innsbruck, Strebenmitte, Oberseite RFBI_mI... RFB Innsbruck, Strebenmitte, seitlich (Innsbruck) RFBI_mB... RFB Innsbruck, Strebenmitte, seitlich (Brenner) RFBI_mu... RFB Innsbruck, Strebenmitte Unterseite RFBI_u... RFB Innsbruck, unterer Anschluss 15

16 16

17 Ende Feld V ZWEI LKWs Dyges-Zeit 09:40:25 Video-Zeit 09:47:11 v= 48,16 km/h; 44,93 km/h Dyges = 5,9721 mm ; 4,0974 mm => Scaling Factor = 0,749 ; 0,758 Dygeskal = 4,4731 mm ; 3,1058 mm Entspr. 35 t 22 t Corresponding LOAD MODEL v-klass km/h; km/h

18 Rainflow Matrix IABSE, Chicago, Sept Damage Matrix Performance Prediction 18

19 VERIFICATION of TEMPERATURE IMPACT IABSE, Chicago, Sept. 2008

20 C 38 st_a_o_gesamt st_a_u_gesamt st_rfbb_a_gesamt st_rfbb_m_gesamt st_rfbb_o_gesamt st_rfbb_u_gesamt st_rfbi_a_gesamt st_rfbi_m_gesamt st_rfbi_o_gesamt st_rfbi_u_gesamt IABSE, Chicago, Sept Richtung Brenner Temperatur - Profil (bei Stütze V) Sondermessung Mai 2007 Stationierung des Profils: x = 576m (entspricht 81m von WL Schönberg) Richtung Innsbruck 32 St_RFBB_o St_A_o St_RFBI_o 30 St_RFBB_m St_RFBI_m L_RFBB St_RFBB_u St_RFBB_a St_A_u St_RFBI_a L_RFBI St_RFBI_u , 0h 24.5, 12h 25.5, 0h 25.5, 12h 26.5, 0h 26.5, 12h 27.5, 0h 27.5, 12h 2007 Daily TEMPERATURE Records 20

21 mm gesamt_durchbiegungen MQ2_InnenTemp_Pt100 Strahlungsleistung Luftfeuchte C kw/m^ %rf , 0h 23.5, 8h 23.5, 16h 24.5, 0h 24.5, 8h 24.5, 16h 25.5, 0h 25.5, 8h 25.5, 16h 26.5, 0h 26.5, 8h 2007 VERIFICATION of RADIATION IMPACT 21

22 BRIMOS IABSE, Chicago, Sept VCDECIS RISK BASED MANAGEMENT

23 A knowledge based approach has enabled better assessment results New promising methodologies are emerging and should be used There is still a gap in knowledge requiring further investigations and research The FP7 IRIS Project Thank you for your attention Conclusions