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Author : Ian D. Aiken
Release : 1989
Genre : Bearings (Machinery)
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Mechanics of Low Shape Factor Elastomeric Seismic Isolation Bearings by : Ian D. Aiken
Download or read book Mechanics of Low Shape Factor Elastomeric Seismic Isolation Bearings written by Ian D. Aiken. This book was released on 1989. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James M. Kelly
Release : 2011-08-24
Genre : Technology & Engineering
Kind : eBook
Book Rating : 809/5 ( reviews)
Book Synopsis Mechanics of Rubber Bearings for Seismic and Vibration Isolation by : James M. Kelly
Download or read book Mechanics of Rubber Bearings for Seismic and Vibration Isolation written by James M. Kelly. This book was released on 2011-08-24. Available in PDF, EPUB and Kindle. Book excerpt: Widely used in civil, mechanical and automotive engineering since the early 1980s, multilayer rubber bearings have been used as seismic isolation devices for buildings in highly seismic areas in many countries. Their appeal in these applications comes from their ability to provide a component with high stiffness in one direction with high flexibility in one or more orthogonal directions. This combination of vertical stiffness with horizontal flexibility, achieved by reinforcing the rubber by thin steel shims perpendicular to the vertical load, enables them to be used as seismic and vibration isolators for machinery, buildings and bridges. Mechanics of Rubber Bearings for Seismic and Vibration Isolation collates the most important information on the mechanics of multilayer rubber bearings. It explores a unique and comprehensive combination of relevant topics, covering all prerequisite fundamental theory and providing a number of closed-form solutions to various boundary value problems as well as a comprehensive historical overview on the use of isolation. Many of the results presented in the book are new and are essential for a proper understanding of the behavior of these bearings and for the design and analysis of vibration or seismic isolation systems. The advantages afforded by adopting these natural rubber systems is clearly explained to designers and users of this technology, bringing into focus the design and specification of bearings for buildings, bridges and industrial structures. This comprehensive book: includes state of the art, as yet unpublished research along with all required fundamental concepts; is authored by world-leading experts with over 40 years of combined experience on seismic isolation and the behavior of multilayer rubber bearings; is accompanied by a website at www.wiley.com/go/kelly The concise approach of Mechanics of Rubber Bearings for Seismic and Vibration Isolation forms an invaluable resource for graduate students and researchers/practitioners in structural and mechanical engineering departments, in particular those working in seismic and vibration isolation.
Author :
Release : 1992
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Summary of Experimental Tests of Elastomeric Seismic Isolation Bearings for Use in Nuclear Reactor Plants by :
Download or read book Summary of Experimental Tests of Elastomeric Seismic Isolation Bearings for Use in Nuclear Reactor Plants written by . This book was released on 1992. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes an experimental test program for isolator bearings which was developed to help establish the viability of using laminated elastomer bearings for base isolation of nuclear reactor plants. The goal of the test program is to determine the performance characteristics of laminated seismic isolation bearings under a wide range of loadings. Tests were performed on scale-size laminated seismic isolators both within the design shear strain range to determine the response of the bearing under expected earthquake loading conditions, and beyond the design range to determine failure modes and to establish safety margins. Three types of bearings, each produced from a different manufacturer, have been tested: (1) high shape factor-high damping-high shear modulus bearings; (2) medium shape factor-high damping-high shear modulus bearings; and (3) medium shape factor-high damping-low shear modulus bearings. All of these tests described in this report were performed at the Earthquake Engineering Research Center at the University of California, Berkeley, with technical assistance from ANL. The tests performed on the three types of bearings have confirmed the high performance characteristics of the high damping-high and low shear modulus elastomeric bearings. The bearings have shown that they are capable of having extremely large shear strains before failure occurs. The most common failure mechanism was the debonding of the top steel plate from the isolators. This failure mechanism can be virtually eliminated by improved manufacturing quality control. The most important result of the failure test of the isolators is the fact that bearings can sustain large horizontal displacement, several times larger than the design value, with failure. Their performance in moderate and strong earthquakes will be far superior to conventional structures.
Author : Adam Talmage Neill
Release : 2002
Genre : Base isolation
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis Effect of Shape Factor on the Seismic Performance of Elastomeric Bearings by : Adam Talmage Neill
Download or read book Effect of Shape Factor on the Seismic Performance of Elastomeric Bearings written by Adam Talmage Neill. This book was released on 2002. Available in PDF, EPUB and Kindle. Book excerpt: Elastomeric bearings are increasingly becoming a design standard in the seismic isolation of large structures and buildings. The rubber bearings used in these designs are made of alternating layers of vulcanized natural or synthetic rubber and thin steel plates. These bearings are expensive to manufacture and are not applicable to smaller structures such as residential buildings. The idea of using inexpensive scrap-rubber tires for making base isolators for residential buildings has been proposed, but the performance of these bearings under seismic forces is not known. Shape factor is an aspect ratio term that is used in describing an elastomeric bearing's dimensional characteristics. Investigation into the performance of bearings with large shape factors has been extensive, but the performance of bearings with small shape factors has not been characterized. Theoretical modeling techniques employed for describing the behavior of rubber bearings with large shape factors are analyzed for the performance of bearings with small shape factors. Deflections of bearings with large shape factors are dominated by shear. As a bearing's shape factor decreases, the governing factor for the deflection changes from shear to bending. As the behavior of the bearing changes from shear to bending, different modeling techniques are necessary to analyze the system. The shape factor at which a bearing goes from shear to bending was established to be in the range of 0.15 to 0.30, which correlates well with theoretical predictions. It was additionally found that the theoretical modeling technique, used to describe the behavior of rubber in compression, is not adequate in predicting the performance of elastomeric bearings with small shape factors.
Author : Farzad Naeim
Release : 1999-03-25
Genre : Technology & Engineering
Kind : eBook
Book Rating : 217/5 ( reviews)
Book Synopsis Design of Seismic Isolated Structures by : Farzad Naeim
Download or read book Design of Seismic Isolated Structures written by Farzad Naeim. This book was released on 1999-03-25. Available in PDF, EPUB and Kindle. Book excerpt: Um die Auswirkungen von Erdbeben auf Gebäude, Brücken und andere empfindliche Konstruktionen zu mildern, wurden im Laufe der Jahre zahlreiche Technologien entwickelt. Eine der neueren hiervon ist die seismische Isolation: Sie beinhaltet den Einbau von Mechanismen, die das Gebäude von den Bewegungen des Untergrunds entkoppeln. Der Erfolg dieser Technik übertrifft den aller vorher bekannten Verfahren - ein Grund für Ingenieure und Architekten, sich genauer zu informieren. Dazu sei dieses Buch empfohlen. (04/99)
