Final Report on the Collapse of the Dallas Cowboys Indoor Practice Facility, May 2, 2009
Title: Final Report on the Collapse of the Dallas Cowboys Indoor Practice Facility, May 2, 2009
Author(s): Gross, J. L.; Main, J.; Phan, L. T.; Sadek, F. H.; Cauffman, S. A.; Jorgensen, D. P.;
Published: January 26, 2010
Abstract: This report summarizes the National Institute of Standards and Technology (NIST) study of the collapse of the Dallas Cowboys indoor practice facility that occurred on the afternoon of May 2, 2009, during a severe thunderstorm. The indoor practice facility was a fabric-covered tubular steel frame structure, designed and constructed in 2003. The structure was upgraded in 2008 with additional purlins, reinforcements for some members, and a new fabric roof covering. The report reviews the wind environment during the storm and outlines the wind conditions, including wind speed and direction at the time and location of collapse. The report also details the NIST field reconnaissance, including the survey of the collapsed structure and of wind damage to the surrounding areas, eyewitness interviews, and information collected from the Dallas Cowboys organization and from the City of Irving, Texas. The survey identified collapse patterns and structural failure modes. The report summarizes the analyses conducted to review the structural design of the practice facility under dead and wind loads, and to identify factors that might have contributed to the collapse. A two-dimensional structural model of a typical frame of the practice facility was developed and analyzed under various loading conditions. Specifically, the analyses included: (1) a Baseline Case that calculated the design demand-capacity ratios using wind loads specified in the ASCE 7-05 Standard and member capacities based on the AISC specifications to assess the ability of the structure to support design wind loads, (2) evaluation of the assumptions and calculations in the 2003 original design and 2008 upgrade to ascertain how those two designs differed from the Baseline Case, and (3) response of the structure to the wind conditions observed during the wind storm of May 2, 2009, to identify frame members that were overstressed and explain the observed failure modes.
Research Areas: Building and Fire Safety Investigations
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
Anybody has the Design Manual and PDF format and can share?
Manual for the design of building structures to Eurocode 1 and Basis of Structural Design (2010)
Thanks in advance.
T.Rangarajan.
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
Concrete Technology: Theory and Practice By M.S. Shetty
Concrete Technology: Theory and Practice By M.S. Shetty
Preface
Cement mortar and concrete are the most widely used construction materials. It is difficult to point out another material of construction which is as versatile as concrete. It is the material of choice where strength, permanence, durability, impermeability , fire resistance and abrasion resistance are required. It is so closely associated now with every human activity that it touches every human being in his day to day living.
Cement concrete is one of the seemingly simple but actually complex material. Many of its complex behaviours are yet to be identified to employ this material advantageously and economically. The behaviour of concrete with respect to long-term drying shrinkage, creep, fatigue, morophology of gel structure, bond, fracture mechanism and polymer modified concrete, fibrous concrete are some of the areas of active research in order to have a deeper understanding of the complex behaviour of these materials.
In any country, construction accounts for about 60 percent of the plan outlay. Out of this, cement and cement product would account for more than 50 percent. Today in India the annual consumption of cement is in the order of 22 million tonnes. It is estimated that the cost of mortar and concrete made from 22 million tons of cement would work out to about Rs. 4,000 crores which is about 1/5 of the plan outlay for the year 1982-83. It is in this context that the knowledge of concrete technology assumes importance.
Concrete is a site-made material unlike other materials of construction and as such can vary to a very great extent in its quality, properties and performance owing to the use of natural materials except cement. From materials of varying properties, to make concrete of stipulated qualities, an intimate knowledge of the interaction of various ingredients that go into the making of concrete is requires to be known, both in the plastic condition and in the hardened condition. This knowledge is necessary for concrete technologists as well as for site engineers.
The book is written mainly to give practical bias into concrete-making practices to students of engineering and site engineers, practical bias needs good theoretical base. Approach to practical solution should be made on the basis of sound theoretical concept. Sometimes, theory, however good, may not be applicable on many practical situations. This is to say, that particularly in concrete-making practices both theory and practice go hand in hand more closely than in many other branches of Engineering mainly because it is a site made material.
There are many good books written on this subject. But there are only a few books dealing with conditions, practice and equipment available in this country . Moreover, most of the books refer to only British and American standards. It has been the endeavour of the author to give as much information as possible about the Indian practice. Indian standard specifications and code of practices for concrete making. if this book helps the reader to make better concrete in the field, my efforts, I feel, are rewarded.
It gives me immense pleasure that the book first published in 1982, has seen more than 25 reprints. the popularity of this book amongst students and practicing engineers has given me the encouragement to revise this book to make it more useful to them. The proposal and encouragement given by officers of s. chand & company to bring this Sixth Edition in multicolour should make the book more useful and attractive.
Concrete technology is becoming a major branch of civil engineering. It is becoming the backbone of infrastructural developments of every country. it has made tremendous advancement in the western and the eastern world. Though Indian is lagging behind. We are catching up fast with the rest of the world.
It can be recalled that in the preface to the first edition (1982) I had mentioned that the cement production in India was 22 million tons. This was about eight decades after we first started manufacturing Portland Cement (1904). It is heart warming to note that in the subsequent two decades after 1982 i.e. in 2004, the production cement has crossed 120 million tons. Today we are the second largest producer of cement in the world, only behind China.
Details of Book: Concrete Technology : Theory And Practice Book: Concrete Technology : Theory And Practice
Author: Shetty M. S
ISBN:8121900034
ISBN-13:9788121900034,978-8121900034
Binding: Paperback
Publishing Date: 2009
Publisher: S. Chand & Company Ltd.
Number of Pages: 656
Language: English
ABLE OF CONTENTS
1. Cement
2. Types Of Cement And Testing Of Cement
3. Aggregates & Testing Of Aggregates
4. Water
5. Admixtures & Construction Chemicals
6. Fresh Concrete
7. Strength Of Concrete
8. Elasticity, Creep & Shrinkage
9. Durability Of Concrete
10. Testing Of Hardened Concrete
11. Concrete Mix Design
12. Special Concrete & Concreting Methods
General Reference Books
List Of Indian Std. Specification &Code Of Practices , Related To Cement & Concrete Subject Index
Review by Nautilus87
The Best book in Concrete Technology in India.
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
Hi there,
Anyone could share API RP-2EQ Seismic Design Procedures and Criteria for Offshore Structures? I think it is still in the draft process.
Thanks in advance
This is Nautilus87, i had posted the links for midas webinars. But i could not attend them , i was busy . I like to know if anyone has recorded them .
Or even if you have attended the One of sessions please be free to convey . There were two introductory and two training sessions.
If anyone has recorded it any one session please let me know .There were four sessions. if you have recorded anyone one of them . let me know
I did'nt know where to post my request so i am posting it here . I hope i am going against any rules.
here is the link that i had posted .
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
API RP 2A WSD 00 - Planning, Designing and Constructing Fixed Offshore Platforms
API RECOMMENDED PRACTICE 2A-WSD (RP 2A-WSD) TWENTY-FIRST EDITION, DECEMBER 2000
This Recommended Practice for Planning, Designing, and Constructing Fixed Offshore Platforms contains engineering design principles and good practices that have evolved during the development of offshore oil resources.
Code:
***************************************
Content of this section is hidden, You must be registered and activate your account to see this content. See this link to read how you can remove this limitation:
![[Image: info.png]](https://forum.civilea.com/postgen/info.png)
![[Image: screen.png]](https://forum.civilea.com/postgen/screen.png)
![[Image: 72596683902612023444.jpg]](https://pic.civilea.com/images/72596683902612023444.jpg)
![[Image: 35307850656700430882.jpg]](https://pic.civilea.com/images/35307850656700430882.jpg)
![[Image: Download.png]](https://forum.civilea.com/postgen/Download.png)
![[Image: 32995743231551436362.jpg]](https://pic.civilea.com/images/32995743231551436362.jpg)
![[Image: password.png]](https://forum.civilea.com/postgen/password.png)
