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 The period does not 1 T 2 depend upon the 1 g mass R X 800 1 K V e R X Forza [kN] 0 2 1 e X 1 -800 R -400 0 400 Spostamento [mm] 1 Working Principle e up to 30 % similar to a Pendulum 1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Curved Surface Sliders FIP series FIP-D series Friction Isolation Pendulum Double Concave Curved Surface Sliders 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) V = 7000 kN f = 0.31 Hz V max = 0.67 m/s d = 340 mm First type tests on 2008 at EUCENTRE Lab. in Italy Single and Double Concave CSS, European Standard EN15129 Vertical load 7000 kN 10000 kN 1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

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 n 2472 isolators Radius of curvature: 4 m >20 % FIP-D 300/520 (4000) Displacement: 260 mm Max Vertical Load: 3000 kN 1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Abruzzo, C.A.S.E. Project 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

Isolator as installed Abruzzo, C.A.S.E. Project September 15, 2009 2000 isolators delivered within 110 days from order 1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

Multidirectional Tests at UCSD FIP-D 300/520 (4000) of the lot of isolators manufactured for the C.A.S.E. Project Multidirectional Type Tests at University of California at San Diego, Caltrans SRMD Laboratory 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) Measured horizontal forces Axis X Axis Y Measured diagonal force vs diagonal displacement 1523 - Castellano M.G., Infanti S. – Seismic Isolation of Buildings in Italy with Double Concave Curved Surface Sliders

School in Rome, Italy 128 isolators T 1 =2.27 s 42 FIP-D 90/400 (2535) 56 FIP-D 130/400 (2535) 30 FIP-D 260/400 (2535) R=2535 mm d 2 = 200 mm

Residential building, Castel di Sangro, Italy n 38 isolators FIP-D 300/560 (4000)

Building in Tirana, Albania PGA=0.27 g T fb =1.02 s T i =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

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