Author: Dipesh Lalwani
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Seismic isolation is a technique used to shift the fundamental period of a structure to a long range period which reduces the forces a structure attracts during a seismic event. Two, widely used bearings in seismic base isolation of structures are elastomeric and lead rubber bearings. A typical elastomeric bearing consists of a number of layers of rubber alternated with steel shims bonded between two rubber layers. The addition of a lead core inserted in a central mandrel hole results in a lead rubber bearing (LRB). The lead enhances the bearings energy dissipating in an earthquake event. When elastomeric or LRBs are simultaneously subjected to vertical compressive load and increasing lateral displacement, the shear force equilibrium path can exhibit a critical point, beyond which the bearing exhibits negative stiffness. Semi-empirical models to simulate this behavior for elastomeric and LRB have been developed in the past. These models rely on experimentally calibrated parameters, making them impractical for design. Recently, a particular mechanics based model, developed for an elastomeric bearing only, approaches the modelling using vertical springs and a simple bi-linear constitutive relationship to represent the rotational behavior of an elastomeric bearing. Overarching goal of the present study is to build on the mechanics based elastomeric model to develop a LRB model. The elastomeric model is modified to include hysteretic behavior of LRB and also uses a Newton type numerical solution technique to solve for response of the bearing. The model, proposed in this study, utilizing vertical springs approach has shown to be capable of simulating the strength, stiffness and hysteretic behavior of LRB well.
Mechanistic Model for Lead Rubber Bearings
Author: Dipesh Lalwani
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Seismic isolation is a technique used to shift the fundamental period of a structure to a long range period which reduces the forces a structure attracts during a seismic event. Two, widely used bearings in seismic base isolation of structures are elastomeric and lead rubber bearings. A typical elastomeric bearing consists of a number of layers of rubber alternated with steel shims bonded between two rubber layers. The addition of a lead core inserted in a central mandrel hole results in a lead rubber bearing (LRB). The lead enhances the bearings energy dissipating in an earthquake event. When elastomeric or LRBs are simultaneously subjected to vertical compressive load and increasing lateral displacement, the shear force equilibrium path can exhibit a critical point, beyond which the bearing exhibits negative stiffness. Semi-empirical models to simulate this behavior for elastomeric and LRB have been developed in the past. These models rely on experimentally calibrated parameters, making them impractical for design. Recently, a particular mechanics based model, developed for an elastomeric bearing only, approaches the modelling using vertical springs and a simple bi-linear constitutive relationship to represent the rotational behavior of an elastomeric bearing. Overarching goal of the present study is to build on the mechanics based elastomeric model to develop a LRB model. The elastomeric model is modified to include hysteretic behavior of LRB and also uses a Newton type numerical solution technique to solve for response of the bearing. The model, proposed in this study, utilizing vertical springs approach has shown to be capable of simulating the strength, stiffness and hysteretic behavior of LRB well.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Seismic isolation is a technique used to shift the fundamental period of a structure to a long range period which reduces the forces a structure attracts during a seismic event. Two, widely used bearings in seismic base isolation of structures are elastomeric and lead rubber bearings. A typical elastomeric bearing consists of a number of layers of rubber alternated with steel shims bonded between two rubber layers. The addition of a lead core inserted in a central mandrel hole results in a lead rubber bearing (LRB). The lead enhances the bearings energy dissipating in an earthquake event. When elastomeric or LRBs are simultaneously subjected to vertical compressive load and increasing lateral displacement, the shear force equilibrium path can exhibit a critical point, beyond which the bearing exhibits negative stiffness. Semi-empirical models to simulate this behavior for elastomeric and LRB have been developed in the past. These models rely on experimentally calibrated parameters, making them impractical for design. Recently, a particular mechanics based model, developed for an elastomeric bearing only, approaches the modelling using vertical springs and a simple bi-linear constitutive relationship to represent the rotational behavior of an elastomeric bearing. Overarching goal of the present study is to build on the mechanics based elastomeric model to develop a LRB model. The elastomeric model is modified to include hysteretic behavior of LRB and also uses a Newton type numerical solution technique to solve for response of the bearing. The model, proposed in this study, utilizing vertical springs approach has shown to be capable of simulating the strength, stiffness and hysteretic behavior of LRB well.
Applied Mechanics
Author: L. C. Zhang
Publisher: World Scientific
ISBN: 9789812777973
Category : Technology & Engineering
Languages : en
Pages : 738
Book Description
This book contains the proceedings of the Third Australasian Congress on Applied Mechanics (ACAM2002). The Congress was held to provide an international forum for researchers, industry practitioners, engineers and postgraduate scholars to exchange and disseminate knowledge and experience of the most recent advances with a focus on the behaviour of solids. Topics include: biomechanics; constitutive modelling; damage; fracture; fatigue; dynamics; impact; vibration; geo-mechanics; tribology; machining and more.
Publisher: World Scientific
ISBN: 9789812777973
Category : Technology & Engineering
Languages : en
Pages : 738
Book Description
This book contains the proceedings of the Third Australasian Congress on Applied Mechanics (ACAM2002). The Congress was held to provide an international forum for researchers, industry practitioners, engineers and postgraduate scholars to exchange and disseminate knowledge and experience of the most recent advances with a focus on the behaviour of solids. Topics include: biomechanics; constitutive modelling; damage; fracture; fatigue; dynamics; impact; vibration; geo-mechanics; tribology; machining and more.
Mechanics of Rubber Bearings for Seismic and Vibration Isolation
Author: James M. Kelly
Publisher: John Wiley & Sons
ISBN: 1119972809
Category : Technology & Engineering
Languages : en
Pages : 217
Book Description
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.
Publisher: John Wiley & Sons
ISBN: 1119972809
Category : Technology & Engineering
Languages : en
Pages : 217
Book Description
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.
Effects of Heating and Load History on the Behavior of Lead-rubber Bearings
Author: Ioannis V. Kalpakidis
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 270
Book Description
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 270
Book Description
Modelling and Computation in Engineering
Author: Jinrong Zhu
Publisher: CRC Press
ISBN: 0203829859
Category : Technology & Engineering
Languages : en
Pages : 210
Book Description
In recent years the theory and technology of modelling and computation in engineering has expanded rapidly, and has been widely applied in various kinds of engineering projects. Modelling and Computation in Engineering is a collection of 37 contributions, which cover the state-of-the-art on a broad range of topics, including:- Tunnelling- Seismic r
Publisher: CRC Press
ISBN: 0203829859
Category : Technology & Engineering
Languages : en
Pages : 210
Book Description
In recent years the theory and technology of modelling and computation in engineering has expanded rapidly, and has been widely applied in various kinds of engineering projects. Modelling and Computation in Engineering is a collection of 37 contributions, which cover the state-of-the-art on a broad range of topics, including:- Tunnelling- Seismic r
Rotating Machinery, Structural Health Monitoring, Shock and Vibration, Volume 5
Author: Tom Proulx
Publisher: Springer Science & Business Media
ISBN: 1441994289
Category : Technology & Engineering
Languages : en
Pages : 542
Book Description
Rotating Machinery, Structural Health Monitoring, Shock and Vibration, Volume 5 Proceedings of the 29th IMAC, A Conference and Exposition on Structural Dynamics, 2011, the fifth volume of six from the Conference, brings together 35 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Rotating Machinery, Structural Health Monitoring, as well as Shock and Vibration, along with other structural engineering areas.
Publisher: Springer Science & Business Media
ISBN: 1441994289
Category : Technology & Engineering
Languages : en
Pages : 542
Book Description
Rotating Machinery, Structural Health Monitoring, Shock and Vibration, Volume 5 Proceedings of the 29th IMAC, A Conference and Exposition on Structural Dynamics, 2011, the fifth volume of six from the Conference, brings together 35 contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Rotating Machinery, Structural Health Monitoring, as well as Shock and Vibration, along with other structural engineering areas.
Design of Lead-rubber Bearings for Bridges
Author: Dynamic Isolation Systems, Inc
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Engineering Properties and Applications of Lead Alloys
Author: Sivaraman Guruswamy
Publisher: CRC Press
ISBN: 1482276909
Category : Technology & Engineering
Languages : en
Pages : 650
Book Description
Focusing on the uses of lead in pure or alloy form for engineering applications, this text presents data on the physical, mechanical, corrosive, accoustic, damping and nuclear properties of lead and lead alloys. It organizes information according to alloy type in tables, graphs and text, and examines the processing of commercially available lead pr
Publisher: CRC Press
ISBN: 1482276909
Category : Technology & Engineering
Languages : en
Pages : 650
Book Description
Focusing on the uses of lead in pure or alloy form for engineering applications, this text presents data on the physical, mechanical, corrosive, accoustic, damping and nuclear properties of lead and lead alloys. It organizes information according to alloy type in tables, graphs and text, and examines the processing of commercially available lead pr
Passive and Active Structural Vibration Control in Civil Engineering
Author: T.T. Soong
Publisher: Springer
ISBN: 3709130123
Category : Computers
Languages : en
Pages : 380
Book Description
Base isolation, passive energy dissipation and active control represent three innovative technologies for protection of structures under environmental loads. Increasingly, they are being applied to the design of new structures or to the retrofit of existing structures against wind, earthquakes and other external loads. This book, with contributions from leading researchers from Japan, Europe, and the United States, presents a balanced view of current research and world-wide development in this exciting and fast expanding field. Basic principles as well as practical design and implementational issues associated with the application of base isolation systems and passive and active control devices to civil engineering structures are carefully addressed. Examples of structural applications are presented and extensively discussed.
Publisher: Springer
ISBN: 3709130123
Category : Computers
Languages : en
Pages : 380
Book Description
Base isolation, passive energy dissipation and active control represent three innovative technologies for protection of structures under environmental loads. Increasingly, they are being applied to the design of new structures or to the retrofit of existing structures against wind, earthquakes and other external loads. This book, with contributions from leading researchers from Japan, Europe, and the United States, presents a balanced view of current research and world-wide development in this exciting and fast expanding field. Basic principles as well as practical design and implementational issues associated with the application of base isolation systems and passive and active control devices to civil engineering structures are carefully addressed. Examples of structural applications are presented and extensively discussed.
Proceedings of the 2nd International Conference on Advances in Civil Infrastructure and Construction Materials (CICM 2023), Volume 1
Author: M. Shahria Alam
Publisher: Springer Nature
ISBN: 3031632761
Category :
Languages : en
Pages : 463
Book Description
Publisher: Springer Nature
ISBN: 3031632761
Category :
Languages : en
Pages : 463
Book Description