SILER Project Training course on seismic protection of lead-cooled reactors

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1 SILER Project SILER Project - Anti-seismic devices Research and Development Department Classification according to European Standard on Antiseismic device, EN15129 High damping rubber bearings ξ = 1 15 % Forza 2H [kn] High damping rubber bearings FIP manufactured more than 72 HDRB for seismic isolation of civil structures For nuclear applications: prequalification by Cogema/Areva for isolators for Usine Georges Besse II, France SI-S 8/162 type test High damping rubber bearings High damping rubber bearings G din(γ) / Gdin(γ=1) Shear modulus vs. shear strain (f=.5 Hz) γ Forza 2H [kn] ξ(γ) / ξ(γ=1) Equivalent viscous damping vs. shear strain (f=.5 Hz) γ Forza 2H [kn] FIP Industriale spa Page 1

2 ROOF (fixed base) GROUND (~ Vessel) ISOLATED BUILDING SILER Project HDRB tests SI-S 115/352 Test at d=66 mm HDRB testing campaign for IRIS (International Reactor Innovative and Secure) Medium size (335 MWe) reactor, International project coordinated by Westinghouse Design of the isolation system of the Nuclear Steam Supplier System made by ENEA, Politecnico of Milan & University of Pisa f i =.7 Hz PGA=.3 g Displacement 1 mm 99 elastomeric isolators (HDRB) Dia. 1 & 13 mm, G=1.4 MPa, total rubber height 1 mm (1 % shear strain) Acceleration (m/s 2 ) Time (s) HDRB testing campaign for IRIS HDRB testing campaign for IRIS Type (qualification) tests on isolators Dynamic tests 6 prototypes: 1:2 scale of Dia. 1 mm isolators; f=.7 Hz, increasing amplitudes (shear 5 mm diameter (1 st strain ± 5%, ± 1%, ± 2%, ± 5%, step; full scale tests will be ± 1% and ± 15%) carried out in the 2 nd step) f=.1,.5, 1, 1.5 Hz, s.s. 1% Characterization tests (compression, CESI laboratory compression shear, quasi-static, dynamic, up to 1.5 Hz, up to s.s. 15 %) Failure tests: - in compression - in shear (+compression) Force [kn] Displacement [mm] 5% S. S. 1% S.S. 2% S.S. 5% S.S. 1% S.S. HDRB testing campaign for IRIS Failure tests in shear-compression 2 isolators tested in double-shear configuration: NO DAMAGE up to shear strain 35 % 1 isolator tested in single-shear configuration: failure at about 38 % s.s. ( 3.8 times the design value) HDRB testing campaign for IRIS repetition of test at ± 1% s.s. after failure in shear: reduction of stiffness the operational capacity of the isolator (i.e. ability to sustain vertical and horizontal loads) is guaranteed even after an important damage FIP Industriale spa Page 2

3 HDRB testing campaign for IRIS failure test in compression on 5 mm Dia. prototype, 1:2 scale of Dia. 1 mm isolators designed for Nuclear Steam Supplier System of IRIS reactor; failure at kn (251 MPa), 23 times the design vertical load HDRB applications HDRB applications Snap back tests on a building isolated with HDRB Displacement 13 mm Lead rubber bearings ξ = 2 3 % FIP Industriale spa Page 3

4 Lead rubber bearings Type test on full scale isolators (Dia. 11 mm) f=.28 Hz, amplitude ± 324 mm (s.s.123 %) Curved Surface Sliders The period does not depend upon the mass T = 2π 1 1 µ g + R X FIP series Curved Surface Sliders FIP-D series -8 Working Principle similar to a Pendulum Forza [kn] Spostamento [mm] 1 µ K e = W + R X 2 1 ξe = π X + 1 µ R ξ e up to 3 % Double Concave Curved Surface Sliders Curved Surface Sliders (FIP & FIP-D series) Curved Surface Sliders (FIP & FIP-D series) V = 7 kn f =.31 Hz V max =.67 m/s d = ± 34 mm Forza Orizzontale 6H [kn] FIP-D 3/52 (4) - Collaudo d'accettazione First type tests on 28 at EUCENTRE Lab. in Italy Single and Double Concave CSS, European Standard EN15129 Vertical load 7 kn 1 kn Spostamento [mm] FIP Industriale spa Page 4

5 Curved Surface Sliders (FIP & FIP-D series) Multidirectional Tests at UCSD FIP-D 3/52 (4) of the lot of isolators manufactured for the C.A.S.E. Project W K r = R Multidirectional Type Tests at University of California at San Diego, Caltrans SRMD Laboratory Multidirectional Tests at UCSD (CA-USA) Applied displacement (clover leaf path) Multidirectional Tests at UCSD (CA-USA) Measured diagonal force vs diagonal displacement FIP-D3 D3-52(4)_Type1_CL.avi Multidirectional Tests at UCSD (CA-USA) Applied displacement time-histories (from records on April 6, 29) Multidirectional Tests at UCSD (CA-USA) Axis X Axis Y Trajectory on the X-Y plane FIP-D3 D3-52(4)_Type1_W2_EQ1.avi FIP Industriale spa Page 5

6 Multidirectional Tests at UCSD (CA-USA) CSS applications Measured horizontal forces Axis X Axis Y Measured diagonal force vs diagonal displacement CSS applications CSS applications CSS applications FIP Industriale spa Page 6

7 Steel hysteretic dampers Steel hysteretic dampers Tapered pin dissipating element Double tapered pin dissipating element Steel hysteretic dampers Steel hysteretic dampers BUTTERFLY shaped dampers Crescent moon elements Flat sliders with steel hysteretic dampers FIP Industriale spa Page 7

8 Flat sliders with steel hysteretic dampers Flat sliders with steel hysteretic dampers Chirag 1 Oil Platform (Retrofit), Azerbaijan Chirag 1 Oil Platform Flat surface sliders with steel hysteretic dampers (crescent moon elements) Viscous dampers FIP Industriale spa Page 8

9 Viscous dampers Viscous dampers Load [kn] Performance Verification / Constant Velocity Test Load [kn] 5 4 F= *V.15 Force vs. Velocity Stroke [mm] 3 2 OTP 5/3 Upper bound Limit (+15%) F = C v α α =.15 Force vs. displacement Lower Bound Limit (-15%) Design Constitutive Law 1 T= -25 C T= 4 C Velocity [mm/s] Time-history dynamic test Rion-Antirion Main Bridge, Grecia Type tests at UCSD 5 cycles; d = ± 3 mm; velocity = 8 mm/s Rion-Antirion Link, Greece Rion-Antirion Main Bridge FIP Industriale spa Page 9

10 Rion-Antirion Main Bridge Taipei 11, Taiwan Achalia-Ilia Earthquake of June 8, 28 M w =6.5 Epicenter 36 km from the bridge The earthquake at pier 2 PGA at Rion bank.127 g Taipei 11, Taiwan Taipei 11, Taiwan 8 viscous dampers for the Tuned Mass Damper F=Cv 2 ( 1 m/s); F=Cv.1 (1 2.3 m/s) F=1 kn s=±75 mm Courtesy of Motioneering Taipei 11 - VDs during a Typhoon Courtesy of Motioneering FIP Industriale spa Page 1

11 Shock Transmission Units Temporary lock up devices able to: Shock Transmission Units Dynamic behaviour Sinusoidal test with imposed force Load [kn] Accommodate low velocity displacements (due to thermal contraction/expansion) with a very low reaction ( 1 % F max ); Prevent high velocity displacements due to events of sudden onset (earthquakes, sudden bracking actions), thus acting as fixed connection during dynamic actions. Frequency 4 Hz Force 24 kn Model: high stiffness spring K F max /5% x displ Displacement [mm] STU applications Storebælt Bridge, Denmark STU applications Stonecutters Bridge -Hong Kong n. 4 STUs F=5 kn, d = ± 11 mm n. 8 STUs F = 8 kn d = ± 4 mm STU applications 4 4 STU applications Stonecutters Bridge - Hong Kong Stonecutters Bridge - Hong Kong FIP Industriale spa Page 11

12 STU applications in buildings Thank you! FIP Industriale spa Page 12