Comparison And Evaluation Of Displacement Based Methods And Modeling Assumptions For Design Of Ordinary Bridges In High Seismic Regions Using Various Computer Software PDF Download

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Comparison and Evaluation of Displacement-based Methods and Modeling Assumptions for Design of Ordinary Bridges in High Seismic Regions Using Various Computer Software

Comparison and Evaluation of Displacement-based Methods and Modeling Assumptions for Design of Ordinary Bridges in High Seismic Regions Using Various Computer Software
Author: Ali Hajihashemi
Publisher:
Total Pages:
Release: 2013
Genre:
ISBN:
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The main objective of this research is to evaluate the effectiveness of three different displacement-based methods for seismic design of ordinary standard bridges. Two bridges previously designed by the Tennessee Department of Transportation (TDOT) engineers following the American Association of State Highway and Transportation Officials (AASHTO) Guide Specifications for LRFD Seismic Bridge Design are selected and investigated in this study. Two different support conditions are considered, one employing seat-type abutments with rigid bent foundations; and the second employing stub wall abutment with flexible bent foundations (Nonlinear Spring Support Configuration). In addition to the AASHTO Specifications, the analysis methods include the capacity-demand-diagram method, as an inelastic demand Capacity Demand Method (CSM), and Federal Emergency Management Agency (FEMA) 440 Procedure C as an equivalent linearization CSM. Pushover analysis methods are used to construct the capacity diagram of the system. Furthermore, the usability of the three most widely used software programs (SAP2000, ADINA, and OpenSees) for performing the displacement-based seismic analysis is studied.This research will provide TDOT engineers with the necessary information on which procedure is the best approach to use for design of highway bridges. Also, it provides information on how well previously designed bridges response when analyzed with the new displacement-based procedures. And finally, it will provide the TDOT engineers with information on capabilities and limitations of various software packages.

Performance-based Seismic Bridge Design

Performance-based Seismic Bridge Design
Author: M. Lee Marsh
Publisher: Transportation Research Board
Total Pages: 138
Release: 2013
Genre: Technology & Engineering
ISBN: 0309223806
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"TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 440, Performance-Based Seismic Bridge Design (PBSD) summarizes the current state of knowledge and practice for PBSD. PBSD is the process that links decision making for facility design with seismic input, facility response, and potential facility damage. The goal of PBSD is to provide decision makers and stakeholders with data that will enable them to allocate resources for construction based on levels of desired seismic performance"--Publisher's description.

Displacement Based Design Methodologies

Displacement Based Design Methodologies
Author:
Publisher:
Total Pages: 0
Release: 2011
Genre:
ISBN: 9783844366419
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This report is the result of the contribution of the JRC towards the LESSLOSS Final Report on "Guidelines for Displacement-based Design of Buildings and ", edited by M.N. Fardis and printed by the IUSS Press of the Istituto Universitario Superiore di Pavia. The report is divided into three sections. The first section addresses the problem of the Displacement Based Evaluation/Design (DBE/D) of reinforced concrete bridges, focusing on the aims and limitations of current seismic evaluation and design practice and the tendencies of the displacement-based seismic evaluation/design methods. The second section presents the secant stiffness and equivalent viscous damping properties of reinforced concrete hollow rectangular bridge piers, both evaluated at maximum pier displacement, representing a significant design tool of direct application to the DBD of bridges, based on the concept of a substitute linear structure as originally defined by Gulkan and Sozen in 1967s. The third section addresses how to determine the deformability or stiffness of bridge piers resulting from the relative contributions of flexural and shear deformations, thus complementing the information given in the first two sections, necessary to complete the performance based design and assessment of a bridge.

Bridge Engineering

Bridge Engineering
Author: W.F. Chen
Publisher: CRC Press
Total Pages: 479
Release: 2003-02-27
Genre: Technology & Engineering
ISBN: 1420039784
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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 Bridge Design and Retrofit -- Structural Solutions

Seismic Bridge Design and Retrofit -- Structural Solutions
Author: fib Fédération internationale du béton. Task Group: Seismic design and assessment procedures for bridges
Publisher: FIB - Féd. Int. du Béton
Total Pages: 3
Release: 2007
Genre: Technology & Engineering
ISBN: 2883940797
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Bridge structures can give the impression that they are rather simple structural systems, whose seismic responses can be easily predicted. On the contrary, however, many bridges did not perform well in recent earthquakes, showing a need for increased research to understand various potential problems and collapse mechanisms. Indeed, progress has been made lately in design and assessment procedures around the world, and consequently many practices have changed. In this context, the objective of fib Bulletin 39 is to present, discuss and critically compare structural solutions for bridge seismic design and retrofit that have been developed and are now used all over the world, ten years after the publication of the last comprehensive manual on the subject. It is the result of the work of an international team of experts that collaborated intensively for over three years. The first four chapters of the Bulletin present a regional review of design choices, compare and discuss international design practices, and indicate their relative merits and potential problems. Current developments are treated in the next three chapters, with particular emphasis on design for enhanced damage control, for spatial variation of ground motion and for fault crossing. The last part presents a summary of current issues related to existing bridges. Extensive technical developments have been taking place in the last two decades with the goal of making bridges an important transportation infrastructure with limited damage during earthquakes. Realising this goal depends on regional seismicity, transportation systems, seismic performance goals, local cultures, and a wide range of design and construction practices, which are presented and discussed in this Bulletin.

Computational Analysis and Design of Bridge Structures

Computational Analysis and Design of Bridge Structures
Author: Chung C. Fu
Publisher: CRC Press
Total Pages: 632
Release: 2014-12-11
Genre: Technology & Engineering
ISBN: 1466579854
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Gain Confidence in Modeling Techniques Used for Complicated Bridge StructuresBridge structures vary considerably in form, size, complexity, and importance. The methods for their computational analysis and design range from approximate to refined analyses, and rapidly improving computer technology has made the more refined and complex methods of ana

AASHTO Guide Specifications for LRFD Seismic Bridge Design

AASHTO Guide Specifications for LRFD Seismic Bridge Design
Author:
Publisher: AASHTO
Total Pages: 249
Release: 2009
Genre: Bridges
ISBN: 1560513969
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Covers seismic design for typical bridge types and applies to non-critical and non-essential bridges. Approved as an alternate to the seismic provisions in the AASHTO LRFD Bridge Design Specifications. Differs from the current procedures in the LRFD Specifications in the use of displacement-based design procedures, instead of the traditional force-based "R-Factor" method. Includes detailed guidance and commentary on earthquake resisting elements and systems, global design strategies, demand modeling, capacity calculation, and liquefaction effects. Capacity design procedures underpin the Guide Specifications' methodology; includes prescriptive detailing for plastic hinging regions and design requirements for capacity protection of those elements that should not experience damage.

Mathematical Models for Suspension Bridges

Mathematical Models for Suspension Bridges
Author: Filippo Gazzola
Publisher: Springer
Total Pages: 274
Release: 2015-05-29
Genre: Mathematics
ISBN: 3319154346
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This work provides a detailed and up-to-the-minute survey of the various stability problems that can affect suspension bridges. In order to deduce some experimental data and rules on the behavior of suspension bridges, a number of historical events are first described, in the course of which several questions concerning their stability naturally arise. The book then surveys conventional mathematical models for suspension bridges and suggests new nonlinear alternatives, which can potentially supply answers to some stability questions. New explanations are also provided, based on the nonlinear structural behavior of bridges. All the models and responses presented in the book employ the theory of differential equations and dynamical systems in the broader sense, demonstrating that methods from nonlinear analysis can allow us to determine the thresholds of instability.

Bridge Engineering Handbook, Second Edition

Bridge Engineering Handbook, Second Edition
Author: Wai-Fah Chen
Publisher: CRC Press
Total Pages: 742
Release: 2014-01-24
Genre: Technology & Engineering
ISBN: 1439852189
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Over 140 experts, 14 countries, and 89 chapters are represented in the second edition of the Bridge Engineering Handbook. This extensive collection highlights bridge engineering specimens from around the world, contains detailed information on bridge engineering, and thoroughly explains the concepts and practical applications surrounding the subject. Published in five books: Fundamentals, Superstructure Design, Substructure Design, Seismic Design, and Construction and Maintenance, this new edition provides numerous worked-out examples that give readers step-by-step design procedures, includes contributions by leading experts from around the world in their respective areas of bridge engineering, contains 26 completely new chapters, and updates most other chapters. It offers design concepts, specifications, and practice, as well as the various types of bridges. The text includes over 2,500 tables, charts, illustrations, and photos. The book covers new, innovative and traditional methods and practices; explores rehabilitation, retrofit, and maintenance; and examines seismic design and building materials. The fourth book, Seismic Design contains 18 chapters, and covers seismic bridge analysis and design. What’s New in the Second Edition: Includes seven new chapters: Seismic Random Response Analysis, Displacement-Based Seismic Design of Bridges, Seismic Design of Thin-Walled Steel and CFT Piers, Seismic Design of Cable-Supported Bridges, and three chapters covering Seismic Design Practice in California, China, and Italy Combines Seismic Retrofit Practice and Seismic Retrofit Technology into one chapter called Seismic Retrofit Technology Rewrites Earthquake Damage to Bridges and Seismic Design of Concrete Bridges chapters Rewrites Seismic Design Philosophies and Performance-Based Design Criteria chapter and retitles it as Seismic Bridge Design Specifications for the United States Revamps Seismic Isolation and Supplemental Energy Dissipation chapter and retitles it as Seismic Isolation Design for Bridges This text is an ideal reference for practicing bridge engineers and consultants (design, construction, maintenance), and can also be used as a reference for students in bridge engineering courses.