SEISMIC DEMANDS FOR PERFORMANCE EVALUATION OF STEEL MOMENT RESISTING FRAME STRUCTURES
Author: Akshay Gupta , Helmut Krawinkler | Size: 2.69 MB | Format:PDF | Quality:Original preprint | Publisher: Department of Civil and Environmental Engineering Stanford University | Year: 1999 | pages: 379 | ISBN: Report No. 132 , (SAC Task 5.4.3)
ABSTRACT
The objective of this work is to improve the knowledge base on the seismic behavior of typical steel moment resisting frame structures, considering regions of different seismicity and sets of ground motions of various intensities and frequency characteristics.
The emphasis is on behavior assessment and quantification of global and local force and deformation demands for different hazard levels. The research is intended to contribute to progress in the development of performance-based seismic design and evaluation of steel moment resisting frame structures. The behavior and response of different height structures in Los Angeles, Seattle, and Boston are studied. Analytical methods and models of various complexities are utilized and evaluated for their ability to predict global and local performance. A sensitivity study is performed on the effects of analysis assumptions on demand predictions. System level behavior characteristics and seismic demands are studied from the perspective of performance at different hazard levels. Local behavior characteristics and element deformation demands are evaluated for various designs, with consideration given to subjective design decisions, variations in material properties, and different types of beamto-column connections. A simplified procedure for estimation of global and local seismic demands is developed to facilitate decision making in the conceptual design process.
This work is concerned only with the behavior of “ductile” structures; fracturing of connections is not considered. The results from this study demonstrate that for ductile code conforming structures the global seismic demands, measured in terms of story drifts, are mostly within the range of acceptable performance at the various hazard levels – with one important exception. This exception occurs when severe ground motions drive a structure into the stability sensitive range, in which case P-delta effects constitute a potential collapse hazard. Local (element) seismic demands are found to be very sensitive to a multitude of factors, which may result in a concentration of plastic deformation demands in either the beams or the panel zones, or in sharing of demands between these two elements and possibly also the columns.
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Design of Earthquake Resistance Buildings Steel Building
Author: Dr. F. Nateghi | Size: 1.8 MB | Format:PDF | Quality:Original preprint | Publisher: Iran International Institute of Earthquake Engineering and Seismology | Year: 2003 | pages: 135 | ISBN: N/A
PART I Building Information
1. General Information 1
1.1. Architectural Information
1.2. General Structural Information
1.3. Soil Properties
1.4. Material Properties
1.5. Design and Analysis Criteria
2. General and Basic Loading Information 4
2.1. Dead Loads
2.2. Live Loads
2.3. Soil Pressure Loads
2.4. Wind Loads
2.5. Quake Loads
2.6. Loading Summary
3. Composite Beam Design 19
3.1. Composite beam type A
3.2. Composite beam type B
4. Diaphragm Control 33
5. Chiller Joints Design 35
6. Stair beams design 36
6.1. Beam design
6.2. Stair connection design
7. Loading combinations 38
8. Base plate design 39
8.1. Base plate 1 (450*450*25)
8.2. Base plate 2 (420*420*25)
8.3. Base plate 3 (400*400*25)
9. Section definition 45
9.1. Column sections
9.2. Beam sections
9.3. Bracing sections
PART II MRF SYSTEM DESIGN
1. Structural Bearing System 57
2. Computer modeling 57
3. Exact Loading Information 58
4. Analyzing Information 60
5. Analyzing output 61
6. Structural Design 61
7. Column Design 61
a. Column Section Design
b. Column Connectors
8. Beam Design 80
9. Rigid connection Design 83
10. Story Drift Control 88
11. P-Δ Effect 92
12. Service earthquake 92
13. Overturning control 93
14. Vertical Earthquake Control 94
15. Uplift Control 94
16. Foundation design 95
PART III BRACING in One Direction and Frame in another
1. Structural Bearing System 97
2. Braced Frame Locating 97
3. Exact Loading Information 97
4. Brace Design 100
5. Story Drift Control 106
6. P-Δ Effect 109
7. Foundation design 109
PART IV ECCENTRIC Bracing in both directions
1. Structural Bearing System 113
2. Braced Frame Locating 113
3. Exact Loading Information 113
4. EBF Design 115
5. Story Drift Control 120
Weight Comparing of structures 123
Appendix A: ETABS Input data 124
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Abstract
This dissertation reports a systematic study on analysis and identification of multiple parameter damped
mechanical systems. The attention is focused on viscously and non-viscously damped multiple degree-offreedom
linear vibrating systems. The non-viscous damping model is such that the damping forces depend
on the past history of motion via convolution integrals over some kernel functions. The familiar viscous
damping model is a special case of this general linear damping model when the kernel functions have no
memory.
The concept of proportional damping is critically examined and a generalized form of proportional
damping is proposed. It is shown that the proportional damping can exist even when the damping mechanism
is non-viscous.
Classical modal analysis is extended to deal with general non-viscously damped multiple degree-offreedom
linear dynamic systems. The new method is similar to the existing method with some modifications
due to non-viscous effect of the damping mechanism. The concept of (complex) elastic modes and nonviscous
modes have been introduced and numerical methods are suggested to obtain them. It is further
shown that the system response can be obtained exactly in terms of these modes. Mode orthogonality
relationships, known for undamped or viscously damped systems, have been generalized to non-viscously
damped systems. Several useful results which relate the modes with the system matrices are developed.
These theoretical developments on non-viscously damped systems, in line with classical modal analysis,
give impetus towards understanding damping mechanisms in general mechanical systems. Based on a
first-order perturbation method, an approach is suggested to the identify non-proportional viscous damping
matrix from the measured complex modes and frequencies. This approach is then further extended to identify
non-viscous damping models. Both the approaches are simple, direct, and can be used with incomplete
modal data.
It is observed that these methods yield non-physical results by breaking the symmetry of the fitted
damping matrix when the damping mechanism of the original system is significantly different from what is
fitted. To solve this problem, approaches are suggested to preserve the symmetry of the identified viscous
and non-viscous damping matrix.
The damping identification methods are applied experimentally to a beam in bending vibration with
localized constrained layer damping. Since the identification method requires complex modal data, a general
method for identification of complex modes and complex frequencies from a set of measured transfer
functions have been developed. It is shown that the proposed methods can give useful information about
the true damping mechanism of the beam considered for the experiment. Further, it is demonstrated that
the damping identification methods are likely to perform quite well even for the case when noisy data is
obtained.
The work conducted here clarifies some fundamental issues regarding damping in linear dynamic systems
and develops efficient methods for analysis and identification of generally damped linear systems.
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Keeping Schools Safe in Earthquakes , Proceedings of the ad hoc Experts’ Group Meeting on Earthquake Safety in Schools, Paris, 9 to 11 February 2004
Author: school safety and security | Size: 8.5 MB | Format:PDF | Quality:Original preprint | Publisher: school safety and security | Year: 2004 | pages: 122
TABLE OF CONTENTS
Preface ............................................................................................................................................ 6
Richard Yelland and Brian Tucker
Executive summary ....................................................................................................................... 8
Reader’s guide .............................................................................................................................15
Introduction: Acknowledging the importance of improving earthquake safety in schools ..19
Hannah von Ahlefeld
Part I. Recognising the obstacles to improving seismic safety of schools ................31
1. Earthquake vulnerability of school buildings in Algeria .............................................35
Fouad Bendimerad
2. Learning about seismic safety of schools from community experience in Berkeley, California 45
Arrietta Chakos
3. Seismic safety of schools in Italy ......................................................................................52
Mauro Dolce
4. Obstacles to improving seismic safety of school buildings in Turkey .....................64
Polat Gülkan
5. Seismic risk in schools: The Venezuelan project ...........................................................88
Oscar A. López, Julio J. Hernández, Gianina Del Re, José Puig and Magnolia Santamaría
6. Towards effective mitigation and emergency response in the Former Yugoslav
Republic of Macedonia ......................................................................................................101
Zoran Milutinovic and Jean-Pierre Massué
7. Making schools safer: The New Zealand experience
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This book is a tutorial written by researchers and developers behind the FEniCS Project and explores an advanced, expressive approach to the development of mathematical software. The presentation spans mathematical background, software design and the use of FEniCS in applications. Theoretical aspects are complemented with computer code which is available as free/open source software. The book begins with a special introductory tutorial for beginners. Following are chapters in Part I addressing fundamental aspects of the approach to automating the creation of finite element solvers. Chapters in Part II address the design and implementation of the FEnicS software. Chapters in Part III present the application of FEniCS to a wide range of applications, including fluid flow, solid mechanics, electromagnetics and geophysics.
I am looking for this book but 2nd Edition which has been posted by Grunf but all links are dead:
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Name: Corrosion of Steel In Concrete: Understanding, investigation and repair
By Broomfield
* Publisher: Taylor & Francis
* Number Of Pages: 277
* Publication Date: 2006-12-26
* ISBN-10 / ASIN: 0415334047
* ISBN-13 / EAN: 9780415334044
* Binding: Hardcover
Product Description:
"Corrosion of Steel in Concrete" provides information on corrosion of steel in atmospherically exposed concrete structures and serves as a guide for those designing, constructing and maintaining buildings, bridges and all reinforced concrete structures. This new edition incorporates the new European standards as well as USA and other international standards. It also covers developments in galvanic and impressed current cathodic protection, new electrochemical techniques such as electro-osmosis, and stainless steel clad reinforcing bars. The corrosion of reinforcing steel in concrete is a major problem facing civil engineers and surveyors throughout the world today. There will always be a need to build structures in corrosive environments and it is therefore essential to address the problems that result. This is a book to educates about and forms a guide to the problems of corrosion, its causes and how to find solutions.
Discovery: Great Quakes 3 parts
1.. San Francisco
In San Francisco, violent earthquakes are a fact of life. From the big one' of 1906 to the World Series stopper of 1989. Can we solve the mystery of earthquakes before the next big one strikes?
2.. Mexico City
The Aztecs believed the world would end by earthquake and fire. For a moment in 1985, it seemed they were right. Mexico City was struck by an earthquake both deadly and mystifying. How did people survive for nine days in the rubble?
3.. Kobe, Japan
It was Japan's worst disaster since World War II. The most deadly earthquake since a 1923 Tokyo quake that killed 140,000 people. The Kobe earthquake was not just a physical earthquake. It was also a cultural earthquake, because it called into question so many bedrock beliefs of the Japanese. Yet more than a Japanese tragedy, this was perhaps a preview of an even greater disaster.
Technical Specs:
Video Codec: XviD
Video Bitrate: 1800 Kbps
Video Resolution: 640x480
Video Aspect Ratio: 1.33 / 4:3
Video Framerate: 29.97
Quality Factor: 0.20 b/px
Audio: English (subs included separately)
Audio Codec: Dolby AC3
Audio Bitrate: 192 kb/s @ 48KHz
Audio Channels: 2
Runtime per Part: 52 minutes / part
Number of Parts: 3
Part Size: 746 MB / part (1/2 DVDR total)
Ripped by: PolarBear
ENGLISH SUBTITLES
Releaser's Note: This is an intense, gripping series with amazing, hard-to-find footage of the disasters. Enjoy,
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Modern Marvels: Engineering Disasters (History Channel) (2008)
Product Details
Actors: Modern Marvels
Directors: History Channel
Format: Box set, Color, NTSC
Language: English
Region: Region 1 (U.S. and Canada only. Read more about DVD formats.)
Aspect Ratio: 1.33:1
Number of discs: 5
Rated: NR (Not Rated)
Studio: A&E HOME VIDEO
DVD Release Date: May 27, 2008
Editorial Reviews
Error is inevitable in all human endeavors, but when the undertakings are engineering feats of enormous proportions, the smallest mistakes may have devastating consequences. From the Exxon Valdez disaster to a nuclear meltdown at a secret government facility, to the devastating effects of Hurricane Katrina, MODERN MARVELS chronicles over 40 of history s most devastating catastrophes and reveals the lessons learned from each one.
In 18 thrilling episodes, HISTORY CHANNEL dramatizes the world s most notorious engineering failures, using state-of-the-art special effects to investigate not only what went wrong, but what can be learned from these spectacular disasters. The catastrophes recounted led to the creation of Superfund sites for the cleanup of toxic waste; improved safety standards for cars, planes, and ships; and new techniques for building roads, bridges, and buildings that will withstand nature s most destructive forces.
Dark clouds with silver linings, MODERN MARVELS: ENGINEERING DISASTERS presents the tragic, yet invaluable, handmaidens of technological progress.
Most Helpful Customer Reviews
Finally, what I was waiting for: a large collection of case studies (18 episodes in total; at least two disasters in every episode - sometimes as many as six) taken from a large variety of engineering areas. As a chemical engineer and as an instructor, I found this collection very interesting, full of different "case studies" and lessons to learn in a very amusing way.
The episodes includes:
- New Orleans: Hurricane Katrina.
- The fire at Las Vegas MGM Hotel.
- The collapse of Seattle's Lacey V. Murrow Floating Bridge.
- The flaw that grounded the first commercial jet.
- An entire lake and the surrounding land are sucked into a Louisiana salt mine.
- Exxon Valdez incident.
- The Ford Explorer/Firestone rollovers.
- The fire on the Piper Alpha offshore oirlig.
- Computer errors that brought the world to the brink of accidental nuclear war.
- The explosion of a jet-fuel plant in Nevada.
- The Union Carbide explosion in India.
- A devastating flood in China that killed 145,000 people.
- Denver baggage system nightmare.
- Patrior missile failure
- etc.
The only drawbacks are that the DVDs come with no closed captions and no subtitles. Thanks HC.
--------------
Many of the major engineering disasters of the past century are covered. Each episode provides about 5 disasters and during the 8-10 minutes is provided the effect (disaster), the cause and the solution. The dvd menu lists each disaster, so one can go quickly to the disasters of their interest.
The episodes included are #4 through #20, plus Hurricane Katrina is provided as a bonus single disaster episode. Which begs the question, what happened to episodes #1, #2, and #3, as they are not in this set? These early three episodes were generally an overview containing a wide number of disasters in brief detail. I suspect, since these episodes were so good, A&E expanded the series to provide much greater detail and limit each succeeding episode to just 5 disasters.
This set also needs an index of every disaster, either on the dvds, or with a paper insert. I loved the menus as they are so simple and easy to follow, without dumb pictures cluttering the screen.
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This has been one of my best DVD purchases; I highly recommend it.
I bought this for my boyfriend who is an engineer and he loves it, and so do I. I was very surprised and intrigued with the variety of engineering disasters that were presented along with the footage. Some of the best ones I've seen so far were the salt mines (the footage of the barges being sucked towards the whirlpool was unbelievable), the Love Canal, and many of the oil rig disasters. I also learned that underground salt deposits make great natural propane storage tanks.
In each episode there are multiple stories not just one or two; it is definitely worth the money.
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David Hatcher Childress (born 1957) is an American author and publisher of books on topics on alternative history and historical revisionism. His works cover such subjects as pre-Columbian trans-oceanic contact, Atlantis, Lemuria, Ancient Astronauts, UFOs, Nikola Tesla, the Knights Templar, lost cities and vimana aircraft. Childress claims no academic credentials as a professional archaeologist nor in any other scientific field of study, having left the University of Montana after one year to travel and research subjects about which he would later write.
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book description :
Popular Lost Cities author David Childress opens the door to the amazing world of ancient technology, from the computers of the ancient world to the "flying machines of the gods." Technology of the Gods explores the technology that was allegedly used in Atlantis and the theory that the Great Pyramid of Egypt was originally a gigantic power station. Childress also uncovers many other mysteries, including: *
the technology of ancient flight *
how the ancients used electricity *
megalithic building techniques *
the use of crystal lenses and the fire from the gods *
ancient evidence of high-tech weapons, including atomic weapons *
the role of modern inventors, such as Nikola Tesla, in bringing ancient technology into modern use *
impossible artifacts, and more, much more. Childress has done it again! From beginning to end, Technology of the Gods is filled with facts, keen observations and tales that challenge modern assumptions in a humorous, intelligent and compelling way that is quintessential Childless.
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Most Helpful Customer Reviews.
I bought this book with great anticipation...was on the waiting list for months! When it finally became available I couldn't wait to read it. I flipped through it in even more anticipation at the fantastic pictures and illustrations once I got it.
I have to say I was thrilled and dissappointed all at once. The content of the book was absolutely fascinating. The author stirred up subjects that totally engulfed me; but as I'd read into each, I found him wandering off into some other rather uninteresting part of the subject and leaving me dieing to get back to the origional thought...which he often didn't. I got the feeling that he hurried the book and that it never really got edited... Thoughts ran off the page and never got finished; as if pages were missing from the printing.
I'd like to see this entire book re-thought and rewritten, because the CONTENT of the book is astounding to say the least. I'd recommend it to anyone who's digging into ancient history/origins because it has so much interesting material. But I would certainly warn them that it's not a well written or easy to follow book. I actually found myself getting bored with the author's wandering thoughts, especially when he teased with a fascinating subject, then wandered off to la la land.
----
Even if you do not agree with everything in this book, this author does a great job of discussing technology that ancient people had. The text is highlighted by pictures that enhance many of this statements he makes. The author does a great job of taking information from a variety of sources to prove his points and clarify his writing.
My two complaints are that some of the pictures are so small that they are frustrating because you can't see much of the detail. Second, the assumption is made that you know about many of the places in this book and I don't. I had never heard of many of these places until reading this book. I would have appreciated a few maps to help clarify where some of these places are.
Great book. Very interesting. Enjoy.
-----
The topics are covered in a Ripley's Believe It Or Not Breathless Rush that leaves the reader wondering where it all will lead. Because there is no index, you will find it difficult to go back and find the inscrutible passages. Because there are virtually no margins (1/4 inch instead of a standard 1 inch) there is no place to write notes or even put stickums without affecting the text. The lines are closely leaded (too close together for comfortable reading) perhaps to save paper or cut costs, but regardless, a less-than-comfortable reading experience. Numerous anecdotes and examples are repeated, as if nobody bothered to edit the text, but rather just wrote it down from a transcribed tape or video. The lack of attention to these basics of book-reader's expectations makes you wonder about the validity of the contents. Good info, but bad format.
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_______________________________________________________________________
Moderators Note:
I try to respect the point of views of the people, because I believe in freedom and democracy.
The detail is that there are rules for everything, and also should respect the views, you first have to respect the rules.
This is a Engineering Forum, and must remain so. If we begin to fill this Forum with "Twilight", "50 Shades of Grey", "Harry Potter", "Canaima" or the last book of Erik Von Daniken, I think we would be leaving some of the main theme that concerns us in these spaces. I have a library of about 250 books on Latinamerican and Anglo-American literature, all very interesting, but I think here is not the space it deserves...
You can understand what I am trying to explain between the lines?
_______________________________________________________________________
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