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Author: Farzad Naeim
Publisher: John Wiley & Sons
ISBN: 9780471149217
Category : Technology & Engineering
Languages : en
Pages : 308
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Book Description
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)
Author: Farzad Naeim
Publisher: John Wiley & Sons
ISBN: 9780471149217
Category : Technology & Engineering
Languages : en
Pages : 308
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Book Description
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)
Author: Masahiko Higashino
Publisher: Taylor & Francis
ISBN: 0415366232
Category : Buildings
Languages : en
Pages : 414
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Book Description
This state of the art report from an internationally-based task group (TG44) of CIB presents a highly authoritative guide to the application of innovative technologies on response control and seismic isolation of buildings to practice worldwide.
Author: James M. Kelly
Publisher: Springer Science & Business Media
ISBN: 1447109716
Category : Technology & Engineering
Languages : en
Pages : 246
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Book Description
Base isolation technology offers a cost-effective and reliable strategy for mitigating seismic damage to structures. The effectiveness of this new technology has been demonstrated not only in laboratory research, but also in the actual response of base-isolated buildings during earthquakes. Increasingly, new and existing buildings in earthquake-prone regions throughout the world are making use of this innovative strategy. In this expanded and updated edition, the design methods and guidelines associated with seismic isolation are detailed. The main focus of the book is on isolation systems that use a damped natural rubber. Topics covered include coupled lateral-torsional response, the behavior of multilayer bearings under compression and bending, and the buckling behavior of elastomeric bearings. Also featured is a section covering the recent changes in building code requirements.
Author: Armin Masroor Shalmani
Publisher:
ISBN:
Category :
Languages : en
Pages : 254
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Book Description
Seismic isolation offers a simple and direct opportunity to control or even eliminate damage to structures subjected to ground shaking by simultaneously reducing deformations and acceleration demands. A base isolation system decouples the superstructure from the ground resulting in elongation of fundamental period of the structure and reducing the accelerations transferred to superstructure during ground shaking. However, increasing the fundamental period of the structure is mostly accompanied by increased displacement demands. In base isolated structures, this large displacement is concentrated at base level where seismic isolation devices are installed and designed to handle these large deformations without damage. A typical base isolated basement design requires a space in which the building is free to move sideways without hitting the surrounding structure. This space is commonly referred to as the "moat". Structural design codes such as ASCE 7-05 that regulate the design of buildings incorporating seismic base isolation systems require the minimum moat wall clearance distance equal to the maximum displacement at the base of the structure under the Maximum Considered Earthquake (MCE), although the superstructure is designed for design basis earthquake (DBE) level. Despite the cautious regulation for moat wall gap distance, pounding of base isolated buildings to moat walls has been reported in previous earthquakes. In conventional structures, the pounding problem between adjacent structures of buildings and highway bridges has been a major cause of seismic damage, even collapse, during earthquakes in the past several decades. Current design specifications may not adequately account for the large forces generated during impact in base isolated buildings. This study investigates the pounding phenomenon in base isolated buildings from both experimental and analytical perspectives by conducting shake table pounding experiments, developing effective models for impact to moat walls and evaluating the adequacy of code specifications for the gap distance of moat walls. A series of prototype base isolated moment and braced buildings designed by professional engineers for the purpose of this project is presented and one of the models was selected for a quarter scale shake table test with moat walls. The pounding experiments indicate that the contact forces generated during pounding can induce yielding in the superstructure and amplify the response acceleration at all stories of the building. The response amplification and damage depends on the gap distance, moat wall properties, and impact velocity. A detailed finite element model of the test setup is developed in OpenSees. An analytical study on the dynamic behavior of the moat walls resulted in proposing a new impact element. Numerical simulation using the proposed impact element compares well with experimental results. A series of collapse studies using the Methodology in FEMA P695 was conducted for both prototype models at various gap distances. The collapse probability of base isolated models used in this study and the effect of moat wall gap distance on the probability of collapse for base isolated structures is investigated. These studies verify that pounding to moat walls at the required gap distance by ASCE7-05 result in acceptable probability of collapse for the flexible and ductile moment frame models examined. However, the braced frame shows a notable drop in collapse margin ratio because of pounding to moat wall at the required gap distance and requires increasing the gap distance by 17%. to have an acceptable collapse probability.
Author: Vasant Matsagar
Publisher: LAP Lambert Academic Publishing
ISBN: 9783838388397
Category :
Languages : en
Pages : 280
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Book Description
Fundamental working principle of earthquake base-isolated structures is presented using analytical shear beam model and discrete 2D and 3D models. The behavior of base-isolated building and influence of the shape of isolator force-deformation loops on its response is studied. The effects of torsional coupling, due to isolator parameters such as the isolation stiffness and/or yield strength, on the seismic response of base-isolated buildings are computed along with the other sources of asymmetries. The dynamics of impact problem in base-isolated buildings is studied through closed-form solutions for shear beam model, wherein free-vibration and earthquake-induced forced-vibration analyses are carried out. The seismic response of multi-story base-isolated symmetric and single-story asymmetric buildings during impact with the adjacent structures under earthquakes is studied. Performance of various isolation devices used in practice categorized as elastomeric and sliding systems is compared during impact condition. The mitigation of impact failures is suggested by introducing viscous or visco-elastic dampers for energy dissipation and seismic response control in the adjacent buildings.
Author: Petros Ioannis Komodromos
Publisher: Advances in Earthquake Enginee
ISBN: 9781853128035
Category : Science
Languages : en
Pages : 0
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Book Description
Ground motion due to earthquake excitation often induces disastrous disturbances that severely damage structures and their contents. Conventional earthquake-resistant design focuses on the strengthening of structures to avoid collapse, while little attention is paid to the prevention of damage as it is almost impossible to construct completely earthquake proof structures at reasonable cost. This state-of-the-art volume explores seismic isolation as an alternative and performance-based design approach to minimise earthquake induced loads and resulting damage in low to medium-rise buildings. A discussion of the characteristics, advantages and limitations of seismic isolation is followed by a demonstration of its capability to decouple a structure from the damaging effects of ground acceleration. Describes currently used seismic isolation systems in detail. Evaluates the performance of seismically isolated structures and provides examples of their response under earthquake action. Proposes a preliminary design methodology for seismically isolated structures. Accessible to both students and practising structural engineers who need to familiarise themselves with this approach.
Author: Andrew Charleson
Publisher: Routledge
ISBN: 1317605411
Category : Architecture
Languages : en
Pages : 205
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Book Description
Seismic isolation offers the highest degree of earthquake protection to buildings and their inhabitants. Modern applications of the technology are less than 50 years old and uptake in seismically active regions continues to soar. Seismic Isolation for Architects is a comprehensive introduction to the theory and practice in this field. Based on the latest research findings and the authors’ extensive experience, coverage includes the application, effectiveness, benefits, and limitations of seismic isolation, as well as the architectural form, design aspects, retrofitting, economics, construction, and maintenance related to this method. The book is written for an international audience: the authors review codes and practices from a number of countries and draw on examples from eleven territories including the US, Chile, Argentina, Italy, Japan, and New Zealand. Aimed at readers without prior knowledge of structural engineering, the book provides an accessible, non-technical approach without using equations or calculations, instead using over 200 drawings, diagrams and images to support the text. This book is key reading for students on architecture and civil engineering courses looking for a clear introduction to seismic-resistant design, as well as architects and engineers working in seismically active regions.
Author: Kumar, K.
Publisher: IGI Global
ISBN: 1522534024
Category : Technology & Engineering
Languages : en
Pages : 365
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Book Description
The success of any product sold to consumers is based, largely, on the longevity of the product. This concept can be extended by various methods of improvement including optimizing the initial creation structures which can lead to a more desired product and extend the product's time on the market. Design and Optimization of Mechanical Engineering Products is an essential research source that explores the structure and processes used in creating goods and the methods by which these goods are improved in order to continue competitiveness in the consumer market. Featuring coverage on a broad range of topics including modeling and simulation, new product development, and multi-criteria decision making, this publication is targeted toward students, practitioners, researchers, engineers, and academicians.
Author: Azer A. Kasimzade
Publisher: Springer
ISBN: 3319931571
Category : Technology & Engineering
Languages : en
Pages : 361
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Book Description
This book features chapters based on selected presentations from the International Congress on Advanced Earthquake Resistance of Structures, AERS2016, held in Samsun, Turkey, from 24 to 28 October 2016. It covers the latest advances in three widely popular research areas in Earthquake Engineering: Performance-Based Seismic Design, Seismic Isolation Systems, and Structural Health Monitoring. The book shows the vulnerability of high-rise and seismically isolated buildings to long periods of strong ground motions, and proposes new passive and semi-active structural seismic isolation systems to protect against such effects. These systems are validated through real-time hybrid tests on shaking tables. Structural health monitoring systems provide rapid assessment of structural safety after an earthquake and allow preventive measures to be taken, such as shutting down the elevators and gas lines, before damage occurs. Using the vibration data from instrumented tall buildings, the book demonstrates that large, distant earthquakes and surface waves, which are not accounted for in most attenuation equations, can cause long-duration shaking and damage in tall buildings. The overview of the current performance-based design methodologies includes discussions on the design of tall buildings and the reasons common prescriptive code provisions are not sufficient to address the requirements of tall-building design. In addition, the book explains the modelling and acceptance criteria associated with various performance-based design guidelines, and discusses issues such as selection and scaling of ground motion records, soil-foundation-structure interaction, and seismic instrumentation and peer review needs. The book is of interest to a wide range of professionals in earthquake engineering, including designers, researchers, and graduate students.
Author: T. K. Datta
Publisher: John Wiley & Sons
ISBN: 047082462X
Category : Technology & Engineering
Languages : en
Pages : 472
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Book Description
While numerous books have been written on earthquakes, earthquake resistance design, and seismic analysis and design of structures, none have been tailored for advanced students and practitioners, and those who would like to have most of the important aspects of seismic analysis in one place. With this book, readers will gain proficiencies in the following: fundamentals of seismology that all structural engineers must know; various forms of seismic inputs; different types of seismic analysis like, time and frequency domain analyses, spectral analysis of structures for random ground motion, response spectrum method of analysis; equivalent lateral load analysis as given in earthquake codes; inelastic response analysis and the concept of ductility; ground response analysis and seismic soil structure interaction; seismic reliability analysis of structures; and control of seismic response of structures. Provides comprehensive coverage, from seismology to seismic control Contains useful empirical equations often required in the seismic analysis of structures Outlines explicit steps for seismic analysis of MDOF systems with multi support excitations Works through solved problems to illustrate different concepts Makes use of MATLAB, SAP2000 and ABAQUAS in solving example problems of the book Provides numerous exercise problems to aid understanding of the subject As one of the first books to present such a comprehensive treatment of the topic, Seismic Analysis of Structures is ideal for postgraduates and researchers in Earthquake Engineering, Structural Dynamics, and Geotechnical Earthquake Engineering. Developed for classroom use, the book can also be used for advanced undergraduate students planning for a career or further study in the subject area. The book will also better equip structural engineering consultants and practicing engineers in the use of standard software for seismic analysis of buildings, bridges, dams, and towers. Lecture materials for instructors available at www.wiley.com/go/dattaseismic
