Author: Federal Emergency Management Agency
Publisher: Createspace Independent Pub
ISBN: 9781484117651
Category : Social Science
Languages : en
Pages : 216
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Book Description
This publication on seismic strengthening of existing buildings is one of a series that FEMA is sponsoring to encourage local decision makers, design professionals, and other interested groups to undertake a program of mitigating the risks posed by existing hazardous buildings in the event of an earthquake. Publications in this series are being prepared under the National Earthquake Hazards Reduction Program (NEHRP) and examine both the engineering/architectural aspects and societal impacts of seismic rehabilitation. FEMA's existing buildings activities are structured to result in a coherent, cohesive, carefully selected and planned reinforcing set of documents designed for national applicability. The resulting publications (descriptive reports, handbooks, and supporting documentation) provide guidance primarily to local elected and appointed officials and design professionals on how to deal not only with earthquake engineering problems but also with the public policy issues and societal dislocations associated with major seismic events. This handbook of techniques for solving a variety of seismic rehabilitation problems and its companion publication on the seismic evaluation of existing buildings reflect basic input provided by two organizations recognized for their retrofit evaluation and design experience as well as the results of a consensus development activity carried out by the Building Seismic Safety Council (BSSC). The preliminary version of this document, the NEHRP Handbook of Techniques for the Seismic Rehabilitation of Existing Buildings, was developed for FEMA by URS/John A. Blume and Associates, Engineers (URS/Blume). A companion volume, the NEHRP Handbook for the Seismic Evaluation of Existing Buildings, for which a preliminary version was developed for FEMA by the Applied Technology Council (ATC), provides a method for evaluating existing buildings to identify those that are likely to be seismically hazardous. The BSSC project, initiated at the request of FEMA in October 1988, has focused on identification and resolution of technical issues in and appropriate revision of the two handbooks by a 22-member Retrofit of Existing Buildings (REB) Committee composed of individuals possessing expertise in the various subjects needed to address seismic rehabilitation.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 213
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Book Description
Author: U. s. Department of Homeland Security
Publisher: Createspace Independent Publishing Platform
ISBN: 9781484111239
Category : Social Science
Languages : en
Pages : 584
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Book Description
A considerable number of buildings in the existing building stock of the United States present a risk of poor performance in earthquakes because there was no seismic design code available or required when they were constructed, because the seismic design code used was immature and had flaws, or because original construction quality or environmental deterioration has compromised the original design. The practice of improving the seismic performance of existing buildings—known variously as seismic rehabilitation, seismic retrofitting, or seismic strengthening—began in the U.S. in California in the 1940s following the Garrison Act in 1939. This Act required seismic evaluations for pre-1933 school buildings. Substandard buildings were required to be retrofit or abandoned by 1975. Many school buildings were improved by strengthening, particularly in the late 1960s and early 1970s as the deadline approached. Local efforts to mitigate the risks from unreinforced masonry buildings (URMs) also began in this time period. In 1984, the Federal Emergency Management Agency (FEMA) began its program to encourage the reduction of seismic hazards posed by existing older buildings throughout the country. Recognizing that building rehabilitation design is far more constrained than new building design and that special techniques are needed to insert new lateral elements, tie them to the existing structure, and generally develop complete seismic load paths, a document was published for this purpose in 1992. FEMA 172, NEHRP Handbook of Techniques for the Seismic Rehabilitation of Existing Buildings (FEMA, 1992b), was intended to identify and describe generally accepted rehabilitation techniques. The art and science of seismic rehabilitation has grown tremendously since that time with federal, state, and local government programs to upgrade public buildings, with local ordinances that mandate rehabilitation of certain building types, and with a growing concern among private owners about the seismic performance of their buildings. In addition, following the demand for better understanding of performance of older buildings and the need for more efficient and less disruptive methods to upgrade, laboratory research on the subject has exploded worldwide, particularly since the nonlinear methods proposed for FEMA 273 became developed. The large volume of rehabilitation work and research now completed has resulted in considerable refinement of early techniques and development of many new techniques, some confined to the research lab and some widely used in industry. Like FEMA 172, this document describes the techniques currently judged to be most commonly used or potentially to be most useful. Furthermore, it has been formatted to take advantage of the ongoing use of typical building types in FEMA documents concerning existing buildings, and to facilitate the addition of techniques in the future. The primary purpose of this document is to provide a selected compilation of seismic rehabilitation techniques that are practical and effective. The descriptions of techniques include detailing and constructability tips that might not be otherwise available to engineering offices or individual structural engineers who have limited experience in seismic rehabilitation of existing buildings. A secondary purpose is to provide guidance on which techniques are commonly used to mitigate specific seismic deficiencies in various model building types. The goals of the document are to: Describe rehabilitation techniques commonly used for various model building types, Incorporate relevant research results, Discuss associated details and construction issues, Provide suggestions to engineers on the use of new products and techniques.
Author:
Publisher: FEMA
ISBN:
Category : Buildings
Languages : en
Pages : 572
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Book Description
Author: Building Seismic Safety Council (U.S.)
Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 224
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Author: William J. Hall
Publisher: DIANE Publishing
ISBN: 1437900941
Category : Technology & Engineering
Languages : en
Pages : 36
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Book Description
Prior to the 1994 Northridge and 1995 Kobe earthquakes, engineers believed that steel moment-frames would bend under earthquake loading, but not break. As a result, this became one of the most common types of construction used for major bldgs. in areas subject to severe earthquakes. The discovery of the potential for fracturing in these frames called to question the adequacy of the building code provisions dealing with this type of construction and created a crisis of confidence. In response, FEMA issued this policy guide to provide a non-technical summary of valuable information, an understanding of the risk associated with steel moment-frame buildings, and the practical measures that can be taken to reduce this risk. Illustrations.
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Publisher:
ISBN:
Category : Buildings
Languages : en
Pages : 0
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Author: Building Seismic Safety Council (U.S.)
Publisher: DIANE Publishing
ISBN: 9781568069913
Category : Science
Languages : en
Pages : 268
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Book Description
Provides engineers involved with the seismic evaluation of existing buildings with guidance concerning the potential earthquake related risk to human life posed by a building or building component.
Author: Ugo Morelli
Publisher: DIANE Publishing
ISBN: 0788183818
Category :
Languages : en
Pages : 169
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Book Description
Provides the Federal Emergency Management Agency's Mitigation Directorate with 25 recommended tasks that should be undertaken through the agency's Existing Buildings Program (EBP) in the coming years. The EBP's expanded but continuing mission in seismic rehabilitation is to limit fatalities, life-threatening injuries, & property & economic losses from earthquakes by increasing the number of seismically resistant buildings in all areas of identified earthquake risk. Identifies 4 objectives & 25 tasks to help make our building stock less vulnerable to earthquake damage. Seeks to provide the continuity necessary for an effective Existing Buildings Program.
Author: United States. Federal Emergency Management Agency
Publisher: FEMA
ISBN:
Category : Earthquake resistant design
Languages : en
Pages : 32
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Book Description
