DAMPING TECHNOLOGY

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Construction of Base Isolated Hospital, Bhuj, India – April 2002

Lead Rubber Bearing being Lowered into Position

Lead Rubber Bearing on Site

Seismic Gap around Services and LRB

Seismic Isolation equals

Concept of Seismic Isolation

Lead Rubber Bearing

Lead Rubber Bearing at Building Site

Test Rig

Lead Rubber Bearing (outer) and Rubber Bearing (inner) Hysteresis Loops

Te Papa – Museum of NZ, Seismically Isolated with Lead Rubber Bearings

Hysteresis Loop for Te Papa Lead Rubber Bearing

Rankine Brown Library Building

Removal of Concrete Block

Lead Rubber Bearing in Place

NZ Parliament – Retrofitted with aLead Rubber Bearing Seismic Isolation System

Motorway Bridge Mounted on Lead Rubber Bearings, NZ

First Bridge to be Seismically Isolated in Japan using Lead Rubber Bearings

USC Hospital on Lead Rubber Bearings Survived 1994 Northridge Earthquake Mw 6.7 with no Damage

The Roball, a Simple Seismic Isolator Currently under Development

Hysteretic Dampers

Rubber Bearings and Steel Damper Details

   Steel Damper Being Tested

Hysteresis Loops for Steel Damper

Railway Viaduct Protected by Steel Dampers

Model of Installation Details of Viaduct

Full Size Steel Damper used in Viaduct

Extrusion of Lead

Hysteresis Loops for Lead Extrusion Damper

Lead Extrusion Damper

Wellington Central Police Station showing 20m Long Flexible Piles

Commercial Viability of Seismic Isolation of Residential Buildings

PVD and RVD

PVDs Left 1MN and Right 200kN

Installation of 4 PVDs – to Extend the Life of Plate Girder Bridges

PVD Installation Details

RVD for Damping Cables in Cable-Stayed Bridges

Computed Response of a Cable with RVD