Improvement Of Nonlinear Static Seismic Analysis Procedures
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Improvement Of Nonlinear Static Seismic Analysis Procedures
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Author : U. s. Department of Homeland Security
language : en
Publisher: CreateSpace
Release Date : 2013-04-02
Improvement Of Nonlinear Static Seismic Analysis Procedures written by U. s. Department of Homeland Security and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-02 with Technology & Engineering categories.
One of the primary goals of the Department of Homeland Security's Federal Emergency Management Agency (FEMA) and the National Earthquake Hazards Reduction Program (NEHRP) is to encourage design and building practices that address the earthquake hazard and minimize the resulting damage. This document, Improvement of Nonlinear Static Seismic Analysis Procedures (FEMA 440), reaffirms FEMA's ongoing efforts to improve the seismic safety of new and existing structures in this country. Knowledgeable engineers have long recognized that the response of buildings to strong ground shaking caused by earthquakes results in inelastic behavior. Until recently, most structural analysis techniques devised for practical application relied on linear procedures to predict the seismic behavior of buildings. With the publication of the ATC-40 Report, Seismic Evaluation and Retrofit of Concrete Buildings, in 1996, the FEMA 273 Report, Guidelines for the Seismic Rehabilitation of Buildings, in 1997, and the FEMA 356 Report, Prestandard and Commentary for the Seismic Rehabilitation of Buildings (which replaced FEMA 273), in 2000, nonlinear static analysis procedures became available to engineers providing efficient and transparent tools for predicting seismic behavior of structures. Both the ATC-40 and FEMA 356 documents present similar performance-based engineering methods that rely on nonlinear static analysis procedures for prediction of structural demands. While procedures in both documents involve generation of a “pushover” curve to predict the inelastic force-deformation behavior of the structure, they differ in the technique used to calculate the inelastic displacement demand for a given ground motion. The publication of the above cited documents resulted in the widespread use of these two methods, and engineers have since reported that the two procedures often give different estimates for displacement demand for the same building. Hence the Applied Technology Council (ATC) proposed to the Federal Emergency Management Agency (FEMA) in 2000 that a study be conducted to determine the reasons for differing results and to develop guidance for practicing engineers on improved application of these two methods. FEMA agreed to fund the investigation, and in October 2000, ATC commenced a project to provide guidance for improved applications of these two widely used inelastic seismic analysis procedures (ATC-55 Project). The ATC-55 Project had two objectives: (1) the development of practical recommendations for improved prediction of inelastic structural response of buildings to earthquakes (i.e., guidance for improved application of inelastic analysis procedures) and (2) the identification of important issues for future research. Intended outcomes of the project included: 1. Improved understanding of the inherent assumptions and theoretical underpinnings of existing and proposed updated inelastic analysis procedures. 2. Recognition of the applicability, limitations, and reliability of various procedures. 3. Guidelines for practicing engineers to apply the procedures to new and existing buildings. 4. Direction for researchers on issues for future improvements of inelastic analysis procedures. This report (FEMA 440) is the final and principal product of the ATC-55 Project. The document has three specific purposes: (1) to provide guidance directly applicable to the evaluation and design of actual structures by engineering practitioners; (2) to facilitate a basic conceptual understanding of underlying principles as well as the associated capabilities and limitations of the procedures; and (3) to provide additional detailed information used in the development of the document for future reference and use by researchers and others.
Improvement Of Nonlinear Static Seismic Analysis Procedures
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Author :
language : en
Publisher:
Release Date : 2005
Improvement Of Nonlinear Static Seismic Analysis Procedures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Buildings categories.
Improvement Of Nonlinear Static Seismic Analysis Procedures
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Author :
language : en
Publisher:
Release Date : 2005
Improvement Of Nonlinear Static Seismic Analysis Procedures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Buildings categories.
Effects Of Strength And Stiffness Degradation On Seismic Response
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Author : U. s. Department of Homeland Security
language : en
Publisher: CreateSpace
Release Date : 2013-04-02
Effects Of Strength And Stiffness Degradation On Seismic Response written by U. s. Department of Homeland Security and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-02 with Technology & Engineering categories.
One of the primary goals of the Federal Emergency Management Agency (FEMA) and the National Earthquake Hazards Reduction Program (NEHRP) is to encourage design and construction practices that address the earthquake hazard and minimize the potential damage resulting from that hazard. This document, Effects of Strength and Stiffness on Degradation on Seismic Response (FEMA P440A), is a follow-on publication to Improvement of Nonlinear Static Seismic Analysis Procedures (FEMA 440). It builds on another FEMA publication addressing the seismic retrofit of existing buildings, the Prestandard and Commentary for Seismic Rehabilitation of Buildings (FEMA 356) and the subsequent publication, ASCE/SEI Standard 41-06 Seismic Rehabilitation of Existing Buildings (ASCE 41). The goal of FEMA 440 was improvement of nonlinear static analysis procedures, as depicted in FEMA 356 and ASCE 41, and development of guidance on when and how such procedures should be used. It was a resource guide for capturing the current state of the art in improved understanding of nonlinear static procedures, and for generating future improvements to those products. One of the recommendations to come out of that work was to fund additional studies of cyclic and in-cycle strength and stiffness degradation, and their impact on response and response stability. This publication provides information that will improve nonlinear analysis for cyclic response, considering cyclic and in-cycle degradation of strength and stiffness. Recent work has demonstrated that it is important to be able to differentiate between cyclic and in-cycle degradation in order to more accurately model degrading behavior, while current practice only recognizes cyclic degradation, or does not distinguish between the two. The material contained within this publication is expected to improve nonlinear modeling of structural systems, and ultimately make the seismic retrofit of existing hazardous buildings more cost-effective.
Seismic Analysis Of Structures And Equipment
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Author : Praveen K. Malhotra
language : en
Publisher: Springer Nature
Release Date : 2020-11-24
Seismic Analysis Of Structures And Equipment written by Praveen K. Malhotra and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-24 with Science categories.
This book describes methods used to estimate forces and deformations in structures during future earthquakes. It synthesizes the topics related to ground motions with those related to structural response and, therefore, closes the gap between geosciences and engineering. Requiring no prior knowledge, the book elucidates confusing concepts related to ground motions and structural response and enables the reader to select a suitable analysis method and implement a cost‐effective seismic design. Presents lucid, accessible descriptions of key concepts in ground motions and structural response and easy to follow descriptions of methods used in seismic analysis; Explains the roles of strength, deformability, and damping in seismic design; Reinforces concepts with real‐world examples; Stands as a ready reference for performance‐based/risk-based seismic design, providing guidance for achieving a cost-effective seismic design.
Influence Of Modeling Parameters On Nonlinear Static And Dynamic Procedures For Seismic Evaluation
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Author : Blake Tuomy
language : en
Publisher:
Release Date : 2003
Influence Of Modeling Parameters On Nonlinear Static And Dynamic Procedures For Seismic Evaluation written by Blake Tuomy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Seismic Design Aids For Nonlinear Analysis Of Reinforced Concrete Structures
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Author : Srinivasan Chandrasekaran
language : en
Publisher: CRC Press
Release Date : 2016-04-19
Seismic Design Aids For Nonlinear Analysis Of Reinforced Concrete Structures written by Srinivasan Chandrasekaran and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Technology & Engineering categories.
Tools to Safeguard New Buildings and Assess Existing OnesNonlinear analysis methods such as static pushover are globally considered a reliable tool for seismic and structural assessment. But the accuracy of seismic capacity estimates-which can prevent catastrophic loss of life and astronomical damage repair costs-depends on the use of the correct b
Seismic Design Aids For Nonlinear Pushover Analysis Of Reinforced Concrete And Steel Bridges
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Author : Jeffrey Ger
language : en
Publisher: CRC Press
Release Date : 2011-08-18
Seismic Design Aids For Nonlinear Pushover Analysis Of Reinforced Concrete And Steel Bridges written by Jeffrey Ger and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-08-18 with Technology & Engineering categories.
Nonlinear static monotonic (pushover) analysis has become a common practice in performance-based bridge seismic design. The popularity of pushover analysis is due to its ability to identify the failure modes and the design limit states of bridge piers and to provide the progressive collapse sequence of damaged bridges when subjected to major earthquakes. Seismic Design Aids for Nonlinear Pushover Analysis of Reinforced Concrete and Steel Bridges fills the need for a complete reference on pushover analysis for practicing engineers. This technical reference covers the pushover analysis of reinforced concrete and steel bridges with confined and unconfined concrete column members of either circular or rectangular cross sections as well as steel members of standard shapes. It provides step-by-step procedures for pushover analysis with various nonlinear member stiffness formulations, including: Finite segment–finite string (FSFS) Finite segment–moment curvature (FSMC) Axial load–moment interaction (PM) Constant moment ratio (CMR) Plastic hinge length (PHL) Ranging from the simplest to the most sophisticated, the methods are suitable for engineers with varying levels of experience in nonlinear structural analysis. The authors also provide a downloadable computer program, INSTRUCT (INelastic STRUCTural Analysis of Reinforced-Concrete and Steel Structures), that allows readers to perform their own pushover analyses. Numerous real-world examples demonstrate the accuracy of analytical prediction by comparing numerical results with full- or large-scale test results. A useful reference for researchers and engineers working in structural engineering, this book also offers an organized collection of nonlinear pushover analysis applications for students.
Advanced Earthquake Engineering Analysis
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Author : Alain Pecker
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-01-23
Advanced Earthquake Engineering Analysis written by Alain Pecker and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-01-23 with Science categories.
During the last decade, the state-of-the-art in Earthquake Engineering Design and Analysis has made significant steps towards a more rational analysis of structures. This book reviews the fundamentals of displacement based methods. Starting from engineering seismology and earthquake geotechnical engineering, it proceeds to focus on design, analysis and testing of structures with emphasis on buildings and bridges.
Seismic Behaviour And Design Of Irregular And Complex Civil Structures
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Author : Oren Lavan
language : en
Publisher: Springer Science & Business Media
Release Date : 2014-07-08
Seismic Behaviour And Design Of Irregular And Complex Civil Structures written by Oren Lavan and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-08 with Technology & Engineering categories.
Structural irregularities are one of the most frequent causes of severe damages in buildings, as evidenced by the numerous earthquakes in recent years. This issue is of particular importance, since real structures are almost all irregular. Furthermore, structural irregularities depend on several factors often very difficult to predict. This book is an essential tool for understanding the problem of structural irregularities and provides the most up-to-date review on this topic, covering the aspects of ground rotations, analysis, design, control and monitoring of irregular structures. It includes 24 contributions from authors of 13 countries, giving a complete and international view of the problem.