Cable-Based Retrofit of Steel Building Floors to Prevent Progressive Collapse
by Samuel Tan, Albolhassan Astaneh-Asl
Abstract
The project summarized here was the third phase of a three-phase research and development project. Phases 1 and 2 focused on new buildings while the third phase, discussed in this report, was primarily for the retrofit of existing buildings. The two main objectives of this study were:
1. To establish inherent strength of typical floor framing systems in steel structures to resist progressive collapse in the event of removal of a column by a bomb blast and;
2. To develop and test cable-based mechanisms that can be used to prevent progressive collapse in the event of removal of a façade column.
The test specimen was a single-story steel frame with composite floor slab. The specimen measured approximately 60 ft (20 m) by 20 ft (6 m) by 6.5 ft (2 m) tall. The steel floor beams were supported by ten wide-flange columns. The beam-to-column connections in the test area were typical shear tabs (single plates). Two columns in the middle span of the specimen were designed and constructed as drop columns. These drop columns terminated 36 inches (1 m) above the laboratory floor. During testing, the support of drop columns could be removed and a vertical downward displacement could be imposed upon these drop columns. Subsequently, the floor displaced downward under gravity load and developed tensile forces due to catenary action. This project investigated the capacity of an existing steel frame structure, retrofitted with high strength steel cables, to resist progressive collapse by developing catenary action in its floor framing members.
Three tests were conducted on the specimen. In the first test, the specimen represented a typical steel structure without any mechanism to prevent progressive collapse. The second and third tests represented the structure after two steel cables were placed on the web of the façade beams, one at each corner of web-flange intersection as a retrofit measure. The cables were anchored to the last column on each end of the floor. The columns transferred the tension force of the cable to the floor framing and the floor slab. The cables acting in a catenary action mode added to the strength of the system and prevented progressive collapse of the floor after removal of the middle column. The mechanisms performed well in the tests and proved to be very efficient and economical in preventing progressive collapse of the tested specimen.
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The list of BS, EN & ISO Standards posted in CivilEA
As the title says this thread contains the list of all BS, EN & ISO standards posted in CivilEA - sorted in numerical order and organized into 10 thematic units i.e. 10 thematic posts. The list will be updated as the new BS, EN and/or ISO standard occurs in the forum.
Thread is closed because there is no need to make a reply here. Dear members, if you find a standard not posted here and you found them on other places in CivilEA or you found some problems or ambiguities with this thread or you just have some better ideas in organizig this thread you are always welcome to inform me (Grunf*) via Profile Comments or PM.
All credits for the Standards linked here goes to the CivilEAns' created original threads. Do not be afraid to hit the thanks button to their posts or to donate points to their profiles - they deserve some kind of award for making upload of those Standards
HINT on how to quick search this thread - Press CTRL+F to open your internet browser search engine. Type in the code number of the standard you need (e.g. 1916) and press ENTER. If the code exists here, the standard would be shown instantly
Contents of this thread:
PAGE 1 of this thread:
Concrete and Cement_________________________________________________________Post #2
Precast Elements_____________________________________________________________Post #3
Metalic and Steel Materials and Products__________________________________________Post #4
Geotechnical Works and Testing ________________________________________________Post #5
Building and Other Structures' Elements and Products _______________________________Post #6
Masonry and Mortar __________________________________________________________Post #7
Other Building Materials ________________________________________________________Post #8
Drainage, Pipelines and Water Treatment _________________________________________Post #9
Tools and Machinery in Civil Engineering ___________________________________________Post #10
Here you can find HRN EN standards (written in Croatian):
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If you like those publications, CivilEAs' staff strongly suggest you to buy them! Support the authors! By any means you may not use those publications to make money or to use them for commercial purpose! Use them only for evaluation!
With regards
Grunf
* I take full responsibility to make this thread up to date because I've created it - of course all other E-Book mods are invited to fill the list with all the appropriate data :JC_handshake:
Mathematical Methods in Science and Engineering S. Selcuk Bayin
Mathematical Methods in Science and Engineering
S. Selcuk Bayin
Publisher: Wiley-Interscience
ISBN: 0470041420 edition 2006
PDF 709 pages 17,6 mb
Mathematical Methods in Science and Engineering's modular structure affords instructors enough flexibility to use this book for several different advanced undergraduate and graduate level courses. Each chapter serves as a review of its subject and can be read independently, thus it also serves as a valuable reference and refresher for scientists and beginning researchers.
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Hi,
Can some one give me AS1170.1-1993 & AS1170.4-1993. This is for my study works. I could find this code here in civilea, but it was 2002 version. But I need 1993 version which I am searching yet.
The structural morphology working group of the International Association for Shell and Spatial Structures, founded in 1991, has helped to launch several international seminars, newsletters and specific sessions of international conferences devoted to structural morphology. This book contains papers that have been selected either for their fundamental contribution to structural morphology or for their actual pertinence in the field. Polyhedral geometry, double-curved surfaces, biological structures, foldable systems, form-finding techniques, and free form design are some of the topics included in the contents of this book. The work presented in this book is the result of more than 15 years of study by researchers, engineers, mathematicians, and architects, who thought that conceptual design would benefit from the association of separate fields (geometry, biology, and mechanics) in a holistic process. Every aspect of structural morphology is illustrated by one or more chapters of the book. As far as we know, there are few books - perhaps none - that gather all aspects of structural morphology, even if, for instance, there are many books on the geometry of polyhedra. Furthermore, readers will have access to a large list of selected references, which will open the scope of their bibliography.
Wo-ld Scie-tific Company | 2010 | ISBN: 9812837205 | 212 pages | PDF | 4,3 MB
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Introducing the basics of architectural science, this book is an ideal reference, providing an understanding of the physical basis of architectural design. The knowledge gained from this book equips the reader with the tools to realize the full potential of the good intentions of sustainable, bioclimatic design.
All sections have been revised and updated for this second edition including more information on small scale energy generation methods and techniques. The book has also been reformatted to be even more accessible, with a larger page size and colour printing.
* Fully updated popular reference on the essentials of Architectural Science
* Reformatted and reorganised for greater ease of use
* Covers principles of heat, light, sound and energy control in just one volume
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Earthquake Resistant Confined Masonry Construction
Earthquake Resistant Confined Masonry Construction
by Svetlana Brzev
# Hardcover: 99 pages
# Publisher: NICE December 2007
# Language: English
# ISBN 81-904190-9-9
This document is written for building professionals interested in learning more about confined masonry construction and for those who would like to promote its application in countries without prior experience related to this construction practice.
Confined masonry has evolved over the last 100 years through an informal process based on its satisfactory performance in past earthquakes in countries and regions of extremely high seismic risk. It is used both for non-engineered and engineered construction; its field applications range from one or two storey high single-family dwellings to six storey apartment buildings. Design and construction provisions for confined masonry are included in building codes in several countries.
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PDF file 2.5 MB
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It is objective of this revised technical manual to assemble in one publication data and procedures that have been successfully used in the design of buried steel penstocks, incorporating the modern advances in steelmaking practices and pipe manufacturing methods to provide the most economical design for the wide range of conditions encountered in the industry.
Other Details
STANDARD NUMBER: AISI E4
AUTHOR-1: American Iron And Steel Institute
COPYRIGHT/PUBLICATION DATE: 1992
BINDING: Paperback
EDITION NUMBER: 1st
SERIES: Volume 4
PAGE COUNT: 87
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4.3MB single bookmarked PDF
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