in Italy with Double Concave Curved Surface Sliders M.Gabriella - - PowerPoint PPT Presentation

Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

M.Gabriella Castellano, S. Infanti

Research and Development Department FIP Industriale, Italy

Curved Surface Sliders

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

X R g T 1 1 2

The period does not depend upon the mass

Working Principle similar to a Pendulum

1 1 R X 1 2 X R 1 V K

e e

e up to

30 %

• 800

800

• 400

400 Spostamento [mm] Forza [kN]

Curved Surface Sliders

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

FIP series FIP-D series

Double Concave Curved Surface Sliders Friction Isolation Pendulum

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Curved Surface Sliders (FIP & FIP-D series)

First type tests on 2008 at EUCENTRE Lab. in Italy Single and Double Concave CSS, European Standard EN15129 Vertical load 7000 kN 10000 kN

V = 7000 kN f = 0.31 Hz Vmax = 0.67 m/s d = 340 mm

L’Aquila, Abruzzo, Italy - C.A.S.E. Project

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Abruzzo, C.A.S.E. Project

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

n 2472 isolators FIP-D 300/520 (4000) Radius of curvature: 4 m >20 % Displacement: 260 mm Max Vertical Load: 3000 kN

Full scale type tests according to EN15129 and Italian Standard Acceptance tests on 20 % of the isolators (15 % quasi-static + 5 % dynamic)

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Abruzzo, C.A.S.E. Project

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Abruzzo, C.A.S.E. Project

September 15, 2009 2000 isolators delivered within 110 days from order

Isolator as installed

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Multidirectional Type Tests at University of California at San Diego, Caltrans SRMD Laboratory

Multidirectional Tests at UCSD

FIP-D 300/520 (4000)

• f the lot of isolators

manufactured for the C.A.S.E. Project

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Multidirectional Tests at UCSD (CA-USA)

Applied displacement time-histories (from records on April 6, 2009 at L’Aquila) Axis X Axis Y Trajectory on the X-Y plane

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Multidirectional Tests at UCSD (CA-USA)

FIP-D300-520(4000)_Type1_W2000_EQ1.avi

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Multidirectional Tests at UCSD (CA-USA)

Axis X Axis Y Measured horizontal forces Measured diagonal force vs diagonal displacement

School in Rome, Italy

42 FIP-D 90/400 (2535) 56 FIP-D 130/400 (2535) 30 FIP-D 260/400 (2535)

128 isolators R=2535 mm d2= 200 mm T1=2.27 s

Residential building, Castel di Sangro, Italy

n 38 isolators FIP-D 300/560 (4000)

Building in Tirana, Albania

PGA=0.27 g Tfb=1.02 s Ti=3.0 s 59 FIP-D 300/520 (4000) 18 FIP-D 380/460 (4000)

Conclusions

• The uniquely severe type testing programme

– in conformity with both national and European norms – performed on full scale Curved Surface Sliders at the EUCENTRE Lab. in Italy and at the SRMD Lab. of the University of California in San Diego (USA) confirmed the reliability of this technology

• Acceptance tests on hundreds of isolators showed a very

small production variability

• CSS isolators are now applied not only in public buildings,

but to private residential buildings as well

1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Thank you for your attention!

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