My involvement in the use of natural rubber as a method for the protec 1976. At that time, tion of buildings against earthquake attack began in I was working on the development of energy-dissipating devices for the same purpose and had developed and tested a device that was even tually used in a stepping-bridge structure, this being a form of partial isolation. It became clear to me that in order to use these energy devices for the earthquake protection of buildings, it would be best to combine them with an isolation system which would give them the large displace ments needed to develop sufficient hysteresis. At this appropriate point in time, I was approached by Dr. C. J. Derham, then of the Malaysian Rubber Producers' Research Association (MRPRA), who asked if I was interested in looking at the possibility of conducting shaking table tests at the Earthquake Simulator Laboratory to see to what extent natural rubber bearings could be used to protect buildings from earthquakes. Very soon after this meeting, we were able to do such a test using a 20-ton model and hand-made isolators. The eady tests were very promising. Accordingly, a further set of tests was done with a more realistic five storey model weighing 40 tons with bearings that were commercially made. In both of the test series, the isolators were used both alone and with a number of different types of energy-dissipating devices to en hance damping.
Sprache
Verlagsort
Verlagsgruppe
Illustrationen
Dateigröße
ISBN-13
978-1-4471-3359-9 (9781447133599)
DOI
10.1007/978-1-4471-3359-9
Schweitzer Klassifikation
1. Isolation for Earthquake Resistance.- 2. Vibration Isolation.- Theory of Vibration Isolation.- Frictional Vibration Isolators.- 3. Seismic Isolation.- Linear Theory of Base Isolation.- 4. Extension of Theory to Buildings.- 5. Code Requirements for Isolated Buildings.- 1986 SEAONC Tentative Provisions.- 1991 UBC.- 6. Coupled Lateral-Torsional Response of Base-Isolated Buildings.- 7. Behavior of Multilayer Bearings Under Compression and Bending.- Shear Stresses Due to Compression.- Tilting Stiffness of a Single Pad.- Pure Compression of Single Pads with Large Shape Factors.- Compression Stiffness for Circular Pads with Large Shape Factors.- Compression Stiffness for Square Bearings with Large Shape Factors.- Tilting Stiffness of Single Pads with Large Shape Factors.- 8. Buckling Behavior of Elastomeric Bearings.- Influence of Vertical Load on Horizontal Stiffness.- A Simple Mechanical Model for Bearing Buckling.- Post-Buckling Behavior.- Influence of Compressive Load on Damping Properties of Bearing.- Roll-out Stability.- 9. Design Process for Multilayer Elastomeric Bearings.- Preliminary Bearing Design Process.- Recent Experimental Studies on Elastomeric Performance.- Compact Design Bearings.- Afterword.- Shake Table Tests of Base-Isolated Models.- Influence of Base Isolation on Secondary Systems and Equipment.- Torsional and Rocking Response in Base-Isolated Structures.- Bearing Mechanics.- Bearing Testing.- Application of Isolation to Nuclear Facilities.- Combined Isolation and Active Control.- Reviews.
