Seismic Evaluation of the Type L and San Luis Obispo Braced Frame FAA Airport Traffic Control Towers
James Wilcoski, Ernest Heymsfield, James Horne, George Manning, and Matthew Walters
US Army Corps
of Engineers
Construction Engineering
Research Laboratories
USACERL Technical Report 99/04
November 1998
81 Pages
This report presents a detailed seismic evaluation of the FAA Airport Traffic
Control Towers (ATCTs) located in Palo Alto, Salinas, San Carlos and San Luis
Obispo, CA. The San Luis Obispo tower is a unique, eccentrically braced steel
frame tower. The three other towers are Type L towers, which are reinforced
concrete-frame structures. Each was evaluated based on the maximum considered
earthquake defined by 1997 National Earthquake Hazards Reduction Program
(NEHRP) Recommended Provisions (FEMA 302). Type L and the San Luis
Obispo towers were evaluated based on several directions of loading and an extreme
assumption that the cab windows do not fail and work as fully effective
shear walls.
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Exclusive for CivilEA
Seismic Performance and Design of Steel and Composite Structures
Introductory lectures by Dr. Roberto Leon from Georgia Tech, partly based on a reference paper by James O. Malley from Degenkolb Engineers.
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AutoCAD Civil 3D software, the building information modeling (BIM) solution for civil engineering, helps teams deliver higher-quality transportation, land development, and environmental projects faster. Its model-based approach helps keep project information coordinated while delivering higher-quality documentation and visualizations. Gain the competitive advantage of BIM to deliver more innovative project solutions.
Downloaded from Rapidshare and installed (32 bit)
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IMPORTANT NOTICE: You may use this software for evaluation purposes only.
If you like it, it is strongly suggested you buy it to support the developers.
By any means you may not use this software to make money or use it for commercial purpose.
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selected colection of previously unpublished steel and steel-concrete composite structures notes and publications
Starting with this one, in the coming days and weeks ALL CivilEA members will be receiving a selected colection of previously unpublished steel and steel-concrete composite structures notes and publications.
The documents posted here are only written by recognized authorities in the field, and are shared for educational purposes.
Enjoy!!!
Sidesway amplification, sidesway buckling and effective length
LeMessurier´s Story Stiffness Approach
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A practical approach to the computational methods used to solve real-world dynamics problems
Computational dynamics has grown rapidly in recent years with the advent of high-speed digital computers and the need to develop simulation and analysis computational capabilities for mechanical and aerospace systems that consist of interconnected bodies.
Computational Dynamics, Second Edition offers a full introduction to the concepts, definitions, and techniques used in multibody dynamics and presents essential topics concerning kinematics and dynamics of motion in two and three dimensions.
Skillfully organized into eight chapters that mirror the standard learning sequence of computational dynamics courses, this Second Edition begins with a discussion of classical techniques that review some of the fundamental concepts and formulations in the general field of dynamics. Next, it builds on these concepts in order to demonstrate the use of the methods as the foundation for the study of computational dynamics. Finally, the book presents different computational methodologies used in the computer-aided analysis of mechanical and aerospace systems.
Each chapter features simple examples that show the main ideas and procedures, as well as straightforward problem sets that facilitate learning and help readers build problem-solving skills.
Clearly written and ready to apply, Computational Dynamics, Second Edition is a valuable reference for both aspiring and practicing mechanical and aerospace engineers.
Review from a User on Amazon.com
This is a great book. Very well written and easy to follow. I bought this because I wanted to know how to implement a constrained Newtonian physics engine. This book provided almost everything I needed to know.
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Since the first edition of this book was published, there have been major improvements in symbolic mathematical languages such as Maple and Mathematica and this has opened up the possibility of solving considerably more complex and hence interesting and realistic elasticity problems as classroom examples. It also enables the student to focus on the formulation of the problem (e.g. the appropriate governing equations and boundary conditions) rather than on the algebraic manipulations, with a consequent improvement in insight into the subject and in motivation. During the past 10 years I have developed files in Maple and Mathematica to facilitate this process, notably electronic versions of the Tables in the present Chapters 19 and 20 and of the recurrence relations for generating spherical harmonics. One purpose of this new edition is to make this electronic material available to the reader through the Kluwer website . I hope that readers will make use of this resource and report back to me any aspects of the electronic material that could benefit from improvement or extension. Some hints about the use of this material are contained in Appendix A. Those who have never used Maple or Mathematica will find that it takes only a few hours of trial and error to learn how to write programs to solve boundary value problems in elasticit
TABLE OF CONTENTS
I: GENERAL CONSIDERATIONS
CHAPTER 1 INTRODUCTION
CHAPTER 2 EQUILIBRIUM AND COMPATIBILITY
II: TWO-DIMENSIONAL PROBLEMS
CHAPTER 3 PLANE STRAIN AND PLANE STRESS
CHAPTER 4 STRESS FUNCTION FORMULATION
CHAPTER 5 PROBLEMS IN RECTANGULAR COORDINATES
CHAPTER 6 END EFFECTS
CHAPTER 7 BODY FORCES
CHAPTER 8 PROBLEMS IN POLAR COORDINATES
CHAPTER 9 CALCULATION OF DISPLACEMENTS
CHAPTER 10 CURVED BEAM PROBLEMS
CHAPTER 11 WEDGE PROBLEMS
CHAPTER 12 PLANE CONTACT PROBLEMS
CHAPTER 13 FORCES, DISLOCATIONS AND CRACKS
CHAPTER 14 THERMOELASTICITY
CHAPTER 15 ANTIPLANE SHEAR
III: END LOADING OF THE PRISMATIC BAR
CHAPTER 16 TORSION OF A PRISMATIC BAR
CHAPTER 17 SHEAR OF A PRISMATIC BAR
IV: THREE-DIMENSIONAL PROBLEMS
CHAPTER 18 DISPLACEMENT FUNCTION SOLUTIONS
CHAPTER 19 THE BOUSSINESQ POTENTIALS
CHAPTER 20 THERMOELASTIC DISPLACEMENT POTENTIALS
CHAPTER 21 SINGULAR SOLUTIONS
CHAPTER 22 SPHERICAL HARMONICS
CHAPTER 23 CYLINDERS AND CIRCULAR PLATES
CHAPTER 24 PROBLEMS IN SPHERICAL COORDINATES
CHAPTER 25 AXISYMMETRIC TORSION
CHAPTER 26 FRICTIONLESS CONTACT
CHAPTER 27 THE BOUNDARY-VALUE PROBLEM
CHAPTER 28 THE PENNY-SHAPED CRACK
CHAPTER 29 THE INTERFACE CRACK
CHAPTER 30 THE RECIPROCAL THEOREM
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Energy Methods in Applied Mechanics by Henry L. Langhaar
The book has been planned for a two-semester course in advanced mechanics for graduate students. In addition, it may be used for independent study and for reference purposes. A_ sound course in advanced calculus, the rudiments of Gibb's vector theory, some knowledge of
advanced strength of materials, and the fundamentals of elasticity, theory are prerequisites. The student who has mastered these subjects will not find the mathematics too difficult.
Energy Methods in Applied Mechanics was developed from class notes used in a graduate course at the University of Illinois for about ten years. I have sustained an interest in energy principles of mechanics for more than twenty years through my research efforts, teaching activities, and employment as a structural research engineer. I am pleased to acknowledge as a
notable source of information the inspiring lectures on variational principles of mechanics by С Lanczos at Purdue University during 1940 and 1941.
Contents
CHAPTER 1. GENERAL CONCEPTS AND PRINCIPLES OF MECHANICS
CHAPTER 2. ELASTIC BEAMS AND FRAMES
CHAPTER 3. METHODS OF THE CALCULUS OF VARIATIONS
CHAPTER 4. DEFORMABLE BODIES
CHAPTER 5. THEORY OF PLATES AND SHELLS
CHAPTER 6. THEORY OF BUCKLING
CHAPTER 7. HAMILTON'S PRINCIPLE AND THE EQUATIONS OF LAGRANGE AND HAMILTON
CHAPTER 8. THEORY OF VIBRATIONS
APPENDIX ON QUADRATIC FORMS
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