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  • a 687 Lead Rubber Bearing (LRB) a Along with sliding bearing a Effective period Teff = 3.3 s a Effective damping ξeff = 30 % a Displacement capacity ± 380 mm

    MARMARA HOSPITAL, TURKEY (retrofit)

    a 210 Friction Pendulum (PS) a From 4,000 kN to 20,000 kN vertical capacity

    a Radius R=4 m a Effective period Teff = 3.45 s a Effective damping ξeff = 16 % a Displacement capacity ± 500 mm

    NATIONAL PALACE MUSEUM, TAIWAN (new)

    a 262 rubber isolator Ø1000 (HDRB) a Along with 36 Fluid Viscous Damper (FD) 1750 kN capacity

    a Isolation period of 3.3 s a Displacement capacity ± 700 mm

    BUCHAREST CITY HALL, ROMANIA (retrofit)

    Seismic isolation strategies for major buildings

    Charles CYNOBER1, Mauro SARTORI2, Burak TÜRKDÖNMEZ3, François TRONEL4 1Freyssinet - France, 2FPC Italia - Italia, 3Freysaş - Turkey, 4Freyrom - Romania

    ID: 667

    Contact www.freyssinet.com Follow us on:

    Contact

    C V 5C V 5

    Earthquake protection devices ISOSISM® range

    To discover the whole range of the ISOSISM® products you can ask for our brochure

    In areas subjected to large earthquakes, the seismic protection of major buildings is a priority for the society. Operational administrative centers, fire stations and hospitals are required for the crisis management. Other buildings such as schools and main museums represent as well a huge social value.

    Abstract

    a Protects occupants and equipment in the building a Reduces overall seismic demand c Generate savings in structural material quantities a Structure remains elastic for design earthquake c Reduced maintenance cost

    Benefits of seismic base isolation

    2.3.a Isosism® isolators

    Elastomer

    Anchor dowel

    Steel reinforcement Screw

    Outer plate

    Lead core Anchor plate

    Outer plate

    Anchor dowel

    Elastomer

    Anchor plate Reinforcement

    Screw

    Bottom anchor plate

    Top anchor plate

    Primary sliding surface

    Secondary sliding surface

    Sliding material

    Slider

    2.3.b Isosism® dampers

    α

    α

    α

    Clevis mountingRod Piston

    Body

    Clevis mounting

    Clevis + Pin

    Clevis + Pin

    2.3.b Isosism® dampers

    α

    α

    α

    2.3.b Isosism® dampers

    α

    α

    α

    Figure 1. Freyssinet ISOSISM products used in buildings’ base isolation

    a Building isolation system design a Device design, production and testing

    a Device Installation on site

    FREYSSINET offers full service

    Key parameters for overall seismic demand reduction: a Increase flexibility a Increase damping

    Introduction

    5%

    30%

    ac ce

    le ra

    tio n

    period

    Increase flexibility

    Increase damping

    5%

    30%