Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara

Transcription

1 Samuele Infanti - Test Laboratory Director Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara

2 HIGHLIGHTS Van Medical Campus, Turkey SEISMIC ISOLATION Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Devices 512 nos. Pendulum Isolators N Ed R d Ed TT FPC kn 6000 mm ±500 mm 12 nos. units tested in U.S.A. at UCSD 95 nos. units tested in Italy at SISLAB

3 HIGHLIGHTS Kahramanmaras Elbistan Hospital, Turkey SEISMIC ISOLATION 2015 Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Devices 455 nos. Pendulum Isolators NEd R ded TT FPCT kn 3100 mm ±300 mm 16 nos. units tested in Italy ateucentre and SISLAB 13 nos. units tested in Italy at EUCENTRE and SISLAB

4 HIGHLIGHTS Samsun Ammonia Tank, Turkey SEISMIC ISOLATION Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Devices 121 nos. Pendulum Isolators NEd R d Ed TT FPC kn 4500 mm ±450 mm 6 nos. unitstestedin Italy atfip laboratoryand witnessed by Padua University 2 nos. units tested in Italy at FIP laboratory

5 HIGHLIGHTS Manisa Merkez Efendi Hospital, Turkey SEISMIC ISOLATION Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Devices 505 Pendulum Isolators N Ed R d Ed TT FPC kn 4500 mm ±360 mm; ±380 mm. 12 nos. units tested in Italy atfip laboratoryand witnessed by Padua University 17 nos. units tested in Italy at FIP laboratory

6 HIGHLIGHTS Tokat Erbaa Hospital, Turkey SEISMIC ISOLATION 2017 Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Devices 309 nos. Pendulum Isolators N Ed R d Ed TT FPC kn 5000 mm ±440 mm 10 nos. units tested in Italy atfip laboratoryand witnessed by Padua University 9 nos. units tested in Italy at FIP laboratory

7 HIGHLIGHTS Mugla Bodrum Hospital, Turkey SEISMIC ISOLATION Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Devices 245 nos. Pendulum Isolators N Ed R d Ed TT FPC kn 4500 mm ±330 mm 4 nos. unitstestedin Italy atfip laboratoryand witnessed by Padua University 10 nos. units tested in Italy at FIP laboratory

8 Description of the Samsun ammonia tank Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara new double wall refrigerated storage tank m 3 capacity, D e =35.1 m, H=31 m - filled with liquefied ammonia high seismicity: Tekkeköy, Samsun region, Turkey PGA: g at DBE, g at MCE the aim is to keep the existing substructure (r.c. slab on 121 square columns) without reducing the capacity of the tank problems: a) insufficient strength of the existing columns; b) sliding of the tank solution: seismic retrofit w.seismic isolation with pendulum isolators

9 Seismic input Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara site specific seismic hazard analysis Sa (g) MCE Site Specific RS DBE Site Specific RS Period (s)

10 Seismic isolation system Design requirements Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara max. base shear at DBE (475 years return period earthquake): 11% W max. base shear at MCE (2475 years return period earthquake): 18% W response modification factor 1.0 for all the earthquake levels max. displacement capacity 450 mm (at MCE)

11 Seismic isolation system Characteristics of the selected isolators 3 types of pendulum isolators R=4.5 m two types of friction material (M and L) average friction coefficient 6.2 %

12 Seismic isolation system Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Characteristics of the selected isolators Isolator Type Isolator mark Max vertical load at ULS seismic N Ed [kn] Max vertical load at ULS static F zd [kn] Nominal coefficient of dynamic friction at N Ed Nos. 1 FIP-D M 1150/900 (4500) % 32 2 FIP-D M 960/900 (4500) % 64 3 FIP-D L 530/900 (4500) % 25 Maximumdisplacementcapacity(d Ed ):±450mm Equivalentradiusofcurvature(R eq ):4500mm Maximum rotation combined with maximum displacement(α): ±0.005 rad

13 Simplified modelling Preliminary analyses on a simplified 3 masses model to design the seismic isolation system Non-linear time history analyses with 3 couples of ground motion records

14 Non-linear time history analyses Input: selected Ground Motion Records ERZINCAN 1992 KOCAELI 1999 DUZCE 1999

15 Non-linear time history analyses Input:check of spectrum compatibility Sa (g) MCE Site Specific RS MCE Erzincan SRSS RS MCE Kocaeli SRSS RS MCE Duzce SRSS RS DBE Site Specific RS DBE Erzincan SRSS RS DBE Kocaeli SRSS RS DBE Duzce SRSS RS Period (s)

16 Non-linear time history analyses Results: base shear Kocaeli 1999 gives the most severe response, well within the required limits: MCE DBE Erzincan Kocaeli The required limits were: 11% at DBE 18% at MCE Duzce 0% 2% 4% 6% 8% 10% 12% 14% Base Shear / Total Weight (%)

17 Non-linear time history analyses Results: displacement MCE DBE Erzincan Kocaeli The required limit was: 450 mm at MCE Duzce Displacement (mm)

18 Non-linear time history analyses Results (Kocaeli 1999 scaled at MCE) Acceleratio on (m/s 2 ) Ground Motion Impulsive Mass Convective Mass Time (s) The peak accerelation of the impulsive mass is 1.57 m/s 2, i.e. 1/3 of the PGA

19 Tests on isolators at FIP Industriale s Dynamic Test Facility according to European Standard EN additional test

20 Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara FIP Dynamic Test Facility Isolators Test System - Main Features Dynamic Vertical Load: Maximum Static Vertical Load: Dynamic Horizontal Load: Dynamic Horizontal Displacement: Horizontal Velocity Actuator: Dynamic Vertical Displacement: Static Vertical Displacement: 200kN 20000kN 30000kN 3000kN ±500mm ±1570mm/s 0 65mm 0 700mm

21 FIP Dynamic Test Facility Isolators Test System Max Vertical Load: 30000kN Total V. Stroke: 700mm Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Horizontal Load: 3000kN Stroke: ±500mm Automatic Sample Loading System

22 Tests on isolators at FIP Industriale s Laboratory - Type Tests FIP-D M 1150/900(4500) vertical load 2210 kn FIP-D L 530/900(4500) vertical load 1503 kn 3 fully reversed cycles, sinusoidal input, displacement ± 450 mm, peak velocity 664 mm/s

23 Tests on isolators at FIP Industriale s Laboratory Type Tests FIP-D M 960/900(4500) displacement ± 359 mm, peak velocity 530 mm/s

24 Tests on isolators at FIP Industriale s Laboratory - Type Tests Friction Vs. Vertical Load D3 - E1 - E2 Tests EN15129:2009

25 Tests on isolators at FIP Industriale s Laboratory Type Tests FIP-D L 530/900(4500) 450mm_664mm/s E1-FIP-DL530.mp4 FIP-D L 1150/900(4500)-450mm_664mm/s D3-FIP-DM1150.mp4

26 Tests on isolators at FIP Industriale s Laboratory -Time History Tests

27 Tests on isolators at FIP Industriale s Laboratory -Time History Tests

28 Tests on isolators at FIP Industriale s Laboratory -Time History Tests

29 Tests on isolators at FIP Industriale s Laboratory Time History Tests MAH00925.MP4 MAH00926.MP4

30 Installation Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara a pendulum isolator (FIP-D series) as installed

31 Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday FIP Dynamic Test Facility Dampers Test System Wyndham Hotel Ankara Izmit Bay Bridge, Turkey OTP.mp4 V. Damper OT(P)500/4000 Design Load: 5000kN Test Stroke: ±200mm Frequency: 0.4Hz Test Velocity: 500mm/s

32 Conclusions Seismic Base Isolation Applications within the Scope of New Codes Workshop 3 May 2018 Thursday Wyndham Hotel Ankara Seismic isolation is an effective solution for the protection of new and existing structures (Buildings, bridges, industrial plants, etc.) seismic isolation with pendulum isolators (double concave curved surface sliders) guarantees the possibility of reusing the existing tank substructures without reducing the tank capacity the nonlinear time history analyses results show that the acceleration on the impulsive mass is less than 1/3 of PGA the results of the dynamic tests carried out on the isolators confirm that their behaviour corresponds to the theoretical one

33 Thanks for Your kind attention.