Seismic Design Of Base Isolated Highway Bridges Utilizing Lead Rubber Bearings

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Seismic Design of Base-isolated Highway Bridges Utilizing Lead-rubber Bearings

Author :
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (614 download)

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Book Synopsis Seismic Design of Base-isolated Highway Bridges Utilizing Lead-rubber Bearings by :

Download or read book Seismic Design of Base-isolated Highway Bridges Utilizing Lead-rubber Bearings written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study is made of the seismic behaviour of base-isolated highway briges with the objective of developing design procedures in the form of code-type approach. The recommendations of current codes concerning the use of energy dissipation mechanisms for the seismic design of bridges are reviewed. A model representing the bridge deck, piers, and the base-isolation system is used to evaluate the response of the bridge to a selected earthquake time history record and to evaluate the effects of various design parameters on the dynamic response. The results of this analysis are used in the development of design guidelines for the isolated bridge system. It was found that base isolation affects the design forces on piers and abutments as well as the deck displacements. An optimum design should provide a reasonable balance between the shear forces on supports and tolerable displacements. Two design procedures are proposed based on the time history and inelastic response spectra approaches. Simplified charts are presented which aid in the seismic design of new bridges as well as in the upgrading of existing ones.

Guide Specifications for Seismic Isolation Design

Author :
Publisher : AASHTO
ISBN 13 : 1560514566
Total Pages : 63 pages
Book Rating : 4.5/5 (65 download)

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Book Synopsis Guide Specifications for Seismic Isolation Design by :

Download or read book Guide Specifications for Seismic Isolation Design written by and published by AASHTO. This book was released on 2010 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition is based on the work of NCHRP project 20-7, task 262 and updates the 2nd (1999) edition -- P. ix.

Seismic Base Isolation Using Lead Rubber Bearings

Author : Dynamic Isolation Systems, Inc
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (374 download)

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Book Synopsis Seismic Base Isolation Using Lead Rubber Bearings by : Dynamic Isolation Systems, Inc

Download or read book Seismic Base Isolation Using Lead Rubber Bearings written by Dynamic Isolation Systems, Inc and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Guide Specifications for Seismic Isolation Design

Author : American Association of State Highway and Transportation Officials
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Guide Specifications for Seismic Isolation Design by : American Association of State Highway and Transportation Officials

Download or read book Guide Specifications for Seismic Isolation Design written by American Association of State Highway and Transportation Officials and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Mechanics of Rubber Bearings for Seismic and Vibration Isolation

Author : James M. Kelly
Publisher : John Wiley & Sons
ISBN 13 : 1119972809
Total Pages : 217 pages
Book Rating : 4.1/5 (199 download)

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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 and published by John Wiley & Sons. This book was released on 2011-08-24 with total page 217 pages. 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.

SEAOC Blue Book

Author :
Publisher :
ISBN 13 : 9781936039036
Total Pages : 256 pages
Book Rating : 4.0/5 (39 download)

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Book Synopsis SEAOC Blue Book by :

Download or read book SEAOC Blue Book written by and published by . This book was released on 2009 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This SEAOC Blue Book: Seismic Design Recommendations is the premier publication of the SEAOC Seismology Committee. The name Blue Book is renowned worldwide among engineers, researchers, and building officials. Since 1959, the SEAOC Blue Book, previously titled Recommended Lateral Force Requirements and Commentary, has been a prescient publication of earthquake engineering. The Blue Book has been at the vanguard of earthquake engineering in California and around the world. This edition of the Blue Books offers a series of articles, that cover specific topics, some related to a particular code provision and some more general relating to an area of practice. While different than the previous editions of the Blue Books, it builds upon the tremendous effort of those who have forged earthquake engineering practice via the previous half-century of Blue Book editions. The Blue Book provides: insight and discussion of earthquake engineering concepts; interpretations of sometimes ambiguous or conflicting provisions of various codes, standards, and guidelines; and practical guidance on design implementation.

Comparison of United States and New Zealand Seismic Design Practices for Highway Bridges

Author : Applied Technology Council
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Comparison of United States and New Zealand Seismic Design Practices for Highway Bridges by : Applied Technology Council

Download or read book Comparison of United States and New Zealand Seismic Design Practices for Highway Bridges written by Applied Technology Council and published by . This book was released on 1982 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Design, Analysis, and Seismic Performance of a Hypothetical Seismically Isolated Bridge on Legacy Highway

Author : Keri Lynn Ryan
Publisher :
ISBN 13 :
Total Pages : 208 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Design, Analysis, and Seismic Performance of a Hypothetical Seismically Isolated Bridge on Legacy Highway by : Keri Lynn Ryan

Download or read book Design, Analysis, and Seismic Performance of a Hypothetical Seismically Isolated Bridge on Legacy Highway written by Keri Lynn Ryan and published by . This book was released on 2011 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need to maintain the functionality of critical transportation lifelines after a large seismic event motivates the strategy to design certain bridges for performance standards beyond the minimum required by bridge design codes. To design a bridge to remain operational, one may stiffen and strengthen the load carrying members to increase the capacity, or alternatively use response modification devices such as seismic isolators to shift the dynamic characteristics of the bridge, henceforth reducing the seismic demands. Seismic isolation systems are attractive because they are directly conducive to accelerated bridge construction techniques. The two strategies are compared for a typical Utah highway bridge, using a three-span, pre-stressed concrete girder bridge that crosses Legacy Highway as a case study example.

Seismic Protection of Bridge Structures Using Shape Memory Alloy-based Isolation Systems Against Near-field Earthquakes

Author : Osman Eser Ozbulut
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (78 download)

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Book Synopsis Seismic Protection of Bridge Structures Using Shape Memory Alloy-based Isolation Systems Against Near-field Earthquakes by : Osman Eser Ozbulut

Download or read book Seismic Protection of Bridge Structures Using Shape Memory Alloy-based Isolation Systems Against Near-field Earthquakes written by Osman Eser Ozbulut and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The damaging effects of strong ground motions on highway bridges have revealed the limitations of conventional design methods and emphasized the need for innovative design concepts. Although seismic isolation systems have been proven to be an effective method of improving the response of bridges during earthquakes, the performance of base-isolated structures during near-field earthquakes has been questioned in recent years. Near-field earthquakes are characterized by long period and large- velocity pulses. They amplify seismic response of the isolation system since the period of these pulses usually coincides with the period of the isolated structures. This study explores the feasibility and effectiveness of shape memory alloy (SMA)-based isolation systems in order to mitigate the response of bridge structures against near-field ground motions. SMAs have several unique properties that can be exploited in seismic control applications. In this work, uniaxial tensile tests are conducted first to evaluate the degree to which the behavior of SMAs is affected by variations in loading rate and temperature. Then, a neuro-fuzzy model is developed to simulate the superelastic behavior of SMAs. The model is capable of capturing rate- and temperature-dependent material response while it remains simple enough to carry out numerical simulations. Next, parametric studies are conducted to investigate the effectiveness of two SMA-based isolation systems, namely superelastic-friction base isolator (S-FBI) system and SMA/rubber-based (SRB) isolation system. The S-FBI system combines superelastic SMAs with a flat steel-Teflon bearing, whereas the SRB isolation system combines SMAs with a laminated rubber bearing rather than a sliding bearing. Upon evaluating the optimum design parameters for both SMA-based isolation systems, nonlinear time history analyzes with energy balance assessment are conducted to compare their performances. The results show that the S-FBI system has more favorable properties than the SRB isolation system. Next, the performance of the S-FBI systems is compared with that of traditional isolation systems used in practice. In addition, the effect of outside temperature on the seismic response of the S-FBI system is assessed. It is revealed that the S-FBI system can successfully reduce the response of bridges against near-field earthquakes and has excellent re-centering ability.

Design of Seismic Isolated Structures

Author : Farzad Naeim
Publisher : John Wiley & Sons
ISBN 13 : 9780471149217
Total Pages : 308 pages
Book Rating : 4.1/5 (492 download)

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Book Synopsis Design of Seismic Isolated Structures by : Farzad Naeim

Download or read book Design of Seismic Isolated Structures written by Farzad Naeim and published by John Wiley & Sons. This book was released on 1999-03-25 with total page 308 pages. 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)

Seismic Design of Bridges Using the Lead-rubber Bearing System

Author : Kwok-Wai Wong
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (11 download)

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Book Synopsis Seismic Design of Bridges Using the Lead-rubber Bearing System by : Kwok-Wai Wong

Download or read book Seismic Design of Bridges Using the Lead-rubber Bearing System written by Kwok-Wai Wong and published by . This book was released on 1986 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Use of Base-isolation in the Design and Retrofit of Bridges

Author :
Publisher :
ISBN 13 : 9780921303152
Total Pages : 10 pages
Book Rating : 4.3/5 (31 download)

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Book Synopsis The Use of Base-isolation in the Design and Retrofit of Bridges by :

Download or read book The Use of Base-isolation in the Design and Retrofit of Bridges written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Existing short and medium span bridges in seismic areas may be retrofitted using base-isolation bearing pads. The selection of pad stiffness characteristics and the decision on the location of the bearings are expected to have a significant effect on the magnitude and distribution of forces on bridge components during earthquakes. The objective of the study reported in this paper, is to investigate the effect of the various design parameters of the isolation system on the bridge response and the design forces on the piers and abutments. These design parameters include the pier stiffness, the elastic and post-elastic stiffness and the location of the bearing pads. A non-linear dynamic model of the bridge is developed to represent the behaviour of the base-isolated bridge system. In the development of model, the bridge deck is assumed to be rigid in its own plane. The model uses a time-dependent tangent stiffness matrix that is updated at the end of each time step. The data for ground motion is taken from actual strong motion earthquake records, and the ground motion is assumed to act in either the longitudinal or transverse directions of the bridge. The system is solved using the Newmark-Beta step by step numerical integration approach. It is concluded that the seismic response of the bridge is sensitive to small variations in the stiffness of flexible piers. The design forces can be shifted from the pier to the abutments by the proper selection of the location of the isolation bearing pads. The response and design forces of the bridge are found to be very sensitive to the stiffness characteristics of the bearing. Overestimation of the bearing stiffness can lead to serious underestimation of the design forces on the structural components of the bridge. For the covering abstract of the Conference see IRRD Abstract no. 807839.

Bridge Engineering

Author : W.F. Chen
Publisher : CRC Press
ISBN 13 : 1420039784
Total Pages : 479 pages
Book Rating : 4.4/5 (2 download)

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Book Synopsis Bridge Engineering by : W.F. Chen

Download or read book Bridge Engineering written by W.F. Chen and published by CRC Press. This book was released on 2003-02-27 with total page 479 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitigating the effects of earthquakes is crucial to bridge design. With chapters culled from the best-selling Bridge Engineering Handbook, this volume sets forth the principles and applications of seismic design, from the necessary geotechnical and dynamic analysis background to seismic isolation and energy dissipation, active control, and retrofit

Seismic Behaviour of Highway Bridges with Base Isolation

Author :
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (614 download)

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Book Synopsis Seismic Behaviour of Highway Bridges with Base Isolation by :

Download or read book Seismic Behaviour of Highway Bridges with Base Isolation written by and published by . This book was released on 1988 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study is made on the seismic behaviour of highway bridges with lead-rubber isolation. the system of base isolation is considered as a bilinear spring. single and twin span highway bridges subjected to representative strong earthquake ground motion records were analyzed. the effect of various parameters such as the isolator's stiffness, pier stiffness, and pier eccentricity on the system response was evaluated. it was found that the use of base isolation shifts the fundamental frequency of the bridge system towards the longer period. proper design of the base isolation tends to reduce the design forces on the bridge piers and is accompanied by larger displacements. simplified design guidelines are adequate as long as the bridge system can be represented by a single degree of freedom model. the reduction in pier stiffness of a two-span bridge may increase the displacement and the force transmitted the abutment. the increased forces at the abutments are accompanied by reduction in the shear force transmitted to the pier. increased displacements and forces may also result when the location of the pier departs from the centre and unequal spans are created. in this case, the maximum displacements and forces occur at the abutment adjacent to the long span.

Proceeding of the Second U.S.-Japan Workshop on Earthquake Protective Systems for Bridges

Author :
Publisher :
ISBN 13 :
Total Pages : 668 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Proceeding of the Second U.S.-Japan Workshop on Earthquake Protective Systems for Bridges by :

Download or read book Proceeding of the Second U.S.-Japan Workshop on Earthquake Protective Systems for Bridges written by and published by . This book was released on 1993 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations

Author : Hiroshi Yokota
Publisher : CRC Press
ISBN 13 : 1000173755
Total Pages : 926 pages
Book Rating : 4.0/5 (1 download)

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Book Synopsis Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations by : Hiroshi Yokota

Download or read book Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations written by Hiroshi Yokota and published by CRC Press. This book was released on 2021-04-20 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridge Maintenance, Safety, Management, Life-Cycle Sustainability and Innovations contains lectures and papers presented at the Tenth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2020), held in Sapporo, Hokkaido, Japan, April 11–15, 2021. This volume consists of a book of extended abstracts and a USB card containing the full papers of 571 contributions presented at IABMAS 2020, including the T.Y. Lin Lecture, 9 Keynote Lectures, and 561 technical papers from 40 countries. The contributions presented at IABMAS 2020 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of maintenance, safety, management, life-cycle sustainability and technological innovations of bridges. Major topics include: advanced bridge design, construction and maintenance approaches, safety, reliability and risk evaluation, life-cycle management, life-cycle sustainability, standardization, analytical models, bridge management systems, service life prediction, maintenance and management strategies, structural health monitoring, non-destructive testing and field testing, safety, resilience, robustness and redundancy, durability enhancement, repair and rehabilitation, fatigue and corrosion, extreme loads, and application of information and computer technology and artificial intelligence for bridges, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of making more rational decisions on maintenance, safety, management, life-cycle sustainability and technological innovations of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including engineers, researchers, academics and students from all areas of bridge engineering.

An Investigation of the Principles and Practices of Seismic Isolation in Bridge Structures

Author : Evan McNeil Lapointe
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (561 download)

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Book Synopsis An Investigation of the Principles and Practices of Seismic Isolation in Bridge Structures by : Evan McNeil Lapointe

Download or read book An Investigation of the Principles and Practices of Seismic Isolation in Bridge Structures written by Evan McNeil Lapointe and published by . This book was released on 2004 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the past decade, seismic isolation systems have gained rapid popularity in the earthquake resistant design of bridge structures. This popularity has come in response to the inadequacy of earlier seismic design and retrofit methodologies. The mechanical shortcomings and subsequent failure mechanisms associated with the early elastic seismic design philosophy are first presented, followed by a study of the applicability of seismic isolation systems in bridge structures. This investigation includes a discussion of the susceptibility of simple span bridges to seismic failure, an overview of the behavior of base isolated structures, a detailed description of isolation system components, an explanation of the mechanics of elastometric isolation bearings, and a presentation of the linear theory of seismic isolation. The qualitative investigation of seismic isolation systems is supplemented by a quantitative nonlinear time-history analysis that illustrates the response of a simple span bridge to seismic excitation. The analysis examines the effects of the varying stiffness of a lead-rubber elastometric bearing upon structural response when subjected to the 1940 El Centro earthquake. The results confirm the expected behavior of isolated structures and emphasize the need for site-specific studies in the design of effective seismic isolation systems for bridge structures.