Mechanics of Rubber Bearings for Seismic and Vibration Isolation als Buch (gebunden)
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Mechanics of Rubber Bearings for Seismic and Vibration Isolation

Sprache: Englisch.
Buch (gebunden)
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 come … weiterlesen
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Mechanics of Rubber Bearings for Seismic and Vibration Isolation als Buch (gebunden)

Produktdetails

Titel: Mechanics of Rubber Bearings for Seismic and Vibration Isolation
Autor/en: James M. Kelly, Dimitrios Konstantinidis

ISBN: 1119994012
EAN: 9781119994015
Sprache: Englisch.
Wiley-Blackwell

16. September 2011 - gebunden - 240 Seiten

Beschreibung

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includes state of the art, as yet unpublished research along with all required fundamental concepts;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.

Inhaltsverzeichnis

About the Authors ix
Preface xiii
1 History of Multilayer Rubber Bearings 1
2 Behavior of Multilayer Rubber Bearings under Compression 19
2.1 Introduction 19
2.2 Pure Compression of Bearing Pads with Incompressible Rubber 19
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 Rubber 33
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 Bending 45
3.1 Bending Stiffness of Single Pad with Incompressible Rubber 45
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 Rubber 52
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 under Compression and Bending 63
4.1 Review of the Compression and Bending of a Pad 64
4.2 Steel Stresses in Circular Bearings with Incompressible Rubber 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 Rubber 73
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 Incompressible Rubber 78
4.4.2 Yielding of Steel Shims for the Case of Compressible Rubber 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 Damping Properties 106
5.6 Rollout Stability 108
5.7 Effect of Rubber Compressibility on Buckling 110
6 Buckling of Multilayer Rubber Isolators in Tension 113
6.1 Introduction 113
6.2 Influence of a Tensile Vertical Load on the Horizontal Stiffness 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 of Multilayer
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 Restraint 160
8.3 The Effect of Surface Slip on the Vertical Stiffness of an Infinite Strip Pad 163
8.4 The Effect of Surface Slip on the Vertical Stiffness of a Circular 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 on their Top and Bottom Supports 184Appendix: Elastic Connection Device for One or More Degrees of Freedom 193
References 209
Photograph Credits 213
Author Index 215
Subject Index 217

Portrait

Karen Gadd has been teaching TRIZ and problem solving with engineering teams from major companies for over 13 years. Her mission is to make TRIZ learning straightforward and the TRIZ Tools easy to use. She has worked on nothing but TRIZ since discovering and learning its power to give us all the routes, to all the solutions, to all engineering problems. In 1998 Karen started Oxford Creativity to concentrate on developing simple and practical TRIZ problem solving for the European market. Karen has taken TRIZ to major companies including Rolls-Royce, British Nuclear Group, Bentley Motors, BAE Systems, Nissan, Pilkington, Borealis and Sanofi Aventis. Oxford Creativity is now well established as one of the world's top TRIZ companies and has helped to make TRIZ well known and widely used throughout Europe and encouraged top companies to create expert TRIZ teams for innovative problem solving. Karen studied Mechanical Engineering at Imperial College, and has an MBA from London Business School. After working in strategy and corporate planning in the City of London she returned to live in Oxford and was a tutor at Oxford's Business School the European School of Management ESCP-EAP (based in Paris, Oxford, Madrid and Berlin). From 1995-2002 she was a Governor of Coventry University. Karen's career has been dedicated to creating new enterprises which make a difference - she founded both MUSIC at OXFORD and the European Union Baroque Orchestra and ran both for over ten years and raised millions in corporate sponsorship to make their activities possible. These successful music organisations still flourish. MUSIC at OXFORD transformed Oxford's music scene and is now approaching its 30th season of top professional classical concerts. EUBO has celebrated 25 years of launching the careers of talented young musicians and has been so successful in its mission, that there are now former EUBO students in every major professional baroque ensemble in the world. Karen launched Oxford Creativity to make TRIZ accessible to everyone and transform and launch careers of TRIZ enthusiasts and champions. There are now thousands of engineers who have learned TRIZ from Karen and who intelligently daily apply TRIZ to solve difficult technical and scientific problems. Karen is long married, has four children and three grandchildren lives happily in Oxford and the Lake District. Karen has recently become a director of the Orchestra of St.John's and concerts and singing are still part of her interests and activities.
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