Kelly / Konstantinidis Mechanics of Rubber Bearings for Seismic and Vibration Isolation

1. Auflage 2011
ISBN: 978-1-119-97280-8
Verlag: John Wiley & Sons
Format: EPUB
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 256 Seiten, E-Book

Widely used in civil, mechanical and automotive engineer-ingsince the early 1980s, multilayer rubber bearings have been used asseismic isolation devices for buildings in highly seismic areas inmany countries. Their appeal in these applications comes from theirability to provide a component with high stiffness in one directionwith high flexibility in one or more orthogonal directions. Thiscombination of vertical stiffness with horizontal flexibility,achieved by reinforcing the rubber by thin steel shimsperpendicular to the vertical load, enables them to be used asseismic and vibra-tion isolators for machinery, buildings andbridges.
Mechanics of Rubber Bearings for Seismic and VibrationIsolation collates the most important information on themechanics of multilayer rubber bearings. It explores a unique andcomprehensive combination of relevant topics, covering allprerequisite fundamental theory and providing a number ofclosed-form solutions to various boundary value problems as well asa comprehensive historical overview on the use of isolation.
Many of the results presented in the book are new and areessential for a proper understanding of the behavior of thesebearings and for the design and analysis of vibration or seismicisolation systems. The advantages afforded by adopting thesenatural rubber systems is clearly explained to designers and usersof this technology, bringing into focus the design andspecification of bearings for buildings, bridges and industrialstructures.
This comprehensive book:
* includes state of the art, as yet unpublished research alongwith all required fundamental concepts;
* is authored by world-leading experts with over 40 years ofcombined experience on seismic isolation and the behavior ofmultilayer rubber bearings;
* is accompanied by a website at www.wiley.com/go/kelly
The concise approach of Mechanics of Rubber Bearingsfor Seismic and Vibration Isolation forms an invaluableresource for graduate students and researchers/practitioners instructural and mechanical engineering departments, in particularthose working in seismic and vibration isolation.

Autoren/Hrsg.

Kelly, James M.

Konstantinidis, Dimitrios

Inhaltsverzeichnis

About the Authors ix
Preface xiii
1 History of Multilayer Rubber Bearings 1
2 Behavior of Multilayer Rubber Bearings under Compression19
2.1 Introduction 19
2.2 Pure Compression of Bearing Pads with Incompressible Rubber19
2.2.1 Infinite Strip Pad 24
2.2.2 Circular Pad 25
2.2.3 Rectangular Pad (with Transition to Square or Strip)26
2.2.4 Annular Pad 27
2.3 Shear Stresses Produced by Compression 30
2.4 Pure Compression of Single Pads with Compressible Rubber33
2.4.1 Infinite Strip Pad 33
2.4.2 Circular Pad 36
2.4.3 Rectangular Pad 39
2.4.4 Annular Pad 40
3 Behavior of Multilayer Rubber Bearings under Bending45
3.1 Bending Stiffness of Single Pad with Incompressible Rubber45
3.1.1 Infinite Strip Pad 47
3.1.2 Circular Pad 48
3.1.3 Rectangular Pad 49
3.1.4 Annular Pad 51
3.2 Bending Stiffness of Single Pads with Compressible Rubber52
3.2.1 Infinite Strip Pad 52
3.2.2 Circular Pad 54
3.2.3 Rectangular Pad 57
3.2.4 Annular Pad 58
4 Steel Stress in Multilayer Rubber Bearings underCompression and Bending 63
4.1 Review of the Compression and Bending of a Pad 64
4.2 Steel Stresses in Circular Bearings with IncompressibleRubber 65
4.2.1 Stress Function Solution for Pure Compression 68
4.2.2 Stress Function Solution for Pure Bending 71
4.3 Steel Stresses in Circular Bearings with Compressible Rubber73
4.3.1 Stress Function Solution for Pure Compression 73
4.3.2 Stress Function Solution for Pure Bending 76
4.4 Yielding of Steel Shims under Compression 78
4.4.1 Yielding of Steel Shims for the Case of IncompressibleRubber 78
4.4.2 Yielding of Steel Shims for the Case of CompressibleRubber 79
5 Buckling Behavior of Multilayer Rubber Isolators 83
5.1 Stability Analysis of Bearings 83
5.2 Stability Analysis of Annular Bearings 90
5.3 Influence of Vertical Load on Horizontal Stiffness 91
5.4 Downward Displacement of the Top of a Bearing 95
5.5 A Simple Mechanical Model for Bearing Buckling 100
5.5.1 Postbuckling Behavior 104
5.5.2 Influence of Compressive Load on Bearing DampingProperties 106
5.6 Rollout Stability 108
5.7 Effect of Rubber Compressibility on Buckling 110
6 Buckling of Multilayer Rubber Isolators in Tension113
6.1 Introduction 113
6.2 Influence of a Tensile Vertical Load on the HorizontalStiffness 115
6.3 Vertical Displacement under Lateral Load 117
6.4 Numerical Modelling of Buckling in Tension 120
6.4.1 Modelling Details 120
6.4.2 Critical Buckling Load in Compression and Tension 122
7 Influence of Plate Flexibility on the Buckling Load ofMultilayer
Rubber Isolators 129
7.1 Introduction 129
7.2 Shearing Deformations of Short Beams 130
7.3 Buckling of Short Beams with Warping Included 139
7.4 Buckling Analysis for Bearing 146
7.5 Computation of Buckling Loads 153
8 Frictional Restraint on Unbonded Rubber Pads 159
8.1 Introduction 159
8.2 Compression of Long Strip Pad with Frictional Restraint160
8.3 The Effect of Surface Slip on the Vertical Stiffness of anInfinite Strip Pad 163
8.4 The Effect of Surface Slip on the Vertical Stiffness of aCircular Pad 169
9 Effect of Friction on Unbonded Rubber Bearings 177
9.1 Introduction 178
9.2 Bearing Designs and Rubber Properties 180
9.3 Ultimate Displacement of Unbonded Bearings 180
9.4 Vertical Stiffness of Unbonded Rubber Bearings with Slip ontheir Top and Bottom Supports 184
Appendix: Elastic Connection Device for One or More Degreesof Freedom 193
References 209
Photograph Credits 213
Author Index 215
Subject Index 217