Design of Buildings for Wind

Emil Simiu, PE, PhD, is a NIST Fellow and a Fellow at the American Society of Civil Engineers. He served as chairman of its Committee on Wind Effects, Committee on Dynamic Effects, and Committee on the Reliability of Offshore Structures; as senior structural engineer with Severud Associates and Ammann & Whitney, Inc.; and as distinguished research professor at Florida International University's International Hurricane Research Center. Also a distinguished member of the ASCE Standard Committee on Loads, he was a recipient of the Federal Engineer of the Year award from the National Society of Professional Engineers, and of the 2006 Japan Association for Wind Engineering Prize, given to the outstanding wind engineering publication of the year, for the first edition of Design of Buildings and Bridges for Wind. In addition, Dr. Simiu is the coauthor of Wind Effects on Structures, Third Edition (Wiley).

ASCE 7 is the US standard for identifying minimum design loads for buildings and other structures. ASCE 7 covers many load types, of which wind is one. The purpose of this book is to provide structural and architectural engineers with the practical state-of-the-art knowledge and tools needed for designing and retrofitting buildings for wind loads. The book will also cover wind-induced loss estimation. This new edition include a guide to the thoroughly revised, 2010 version of the ASCE 7 Standard provisions for wind loads; incorporate major advances achieved in recent years in the design of tall buildings for wind; present material on retrofitting and loss estimation; and improve the presentation of the material to increase its usefulness to structural engineers.
 
Key features:
* New focus on tall buildings helps make the analysis and design guidance easier and less complex.
* Covers the new simplified design methods of ASCE 7-10, guiding designers to clearly understand the spirit and letter of the provisions and use the design methods with confidence and ease.
* Includes new coverage of retrofitting for wind load resistance and loss estimation from hurricane winds.
* Thoroughly revised and updated to conform with current practice and research.

PREFACE xi
 
PART I INTRODUCTION 1
 
1 OVERVIEW 3
 
PART II GUIDE TO THE ASCE 7-10 STANDARD PROVISIONS ON WIND LOADS 7
 
2 ASCE 7-10 WIND LOADING PROVISIONS 9
 
2.1 Introduction / 9
 
2.2 ASCE 7-10 Standard: An Overview / 10
 
2.3 Organization of the Guide: Chapters 3 to 9 / 19
 
3 REGULAR AND SIMPLIFIED APPROACH: RISK CATEGORY, BASIC WIND SPEED, ENCLOSURE, EXPOSURE, TOPOGRAPHIC FACTOR 21
 
3.1 Risk Category (ASCE Table 1.5-1) / 21
 
3.2 Basic Wind Speed V (ASCE Sect. 26.5, ASCE Figs. 26.5.-1a, b, c) / 22
 
3.3 Enclosure Classification (ASCE Sects. 26.2 and 26.10) / 23
 
3.4 Exposure Category (ASCE Sect. 26.7) / 24
 
3.5 Topographic Factor Kzt (ASCE Sect. 26.8, ASCE Fig. 26.8-1) / 27
 
4 REGULAR APPROACH: STEPS COMMON TO ALL BUILDINGS/OTHER STRUCTURES (MWFRS AND C&C) 31
 
4.1 Introduction / 31
 
4.2 Regular Approach: Steps Common to All Buildings and Other Structures (MWFRS and C&C) / 32
 
5 REGULAR APPROACH: BUILDINGS, PARAPETS, OVERHANGS (''DIRECTIONAL'' PROCEDURE), MWFRS 37
 
5.1 Introduction / 37
 
5.2 Regular Approach: Enclosed or Partially Enclosed Buildings of All Heights, MWFRS / 37
 
5.3 Regular Approach: Roof Overhangs and Parapets, MWFRS / 53
 
5.4 Regular Approach: Open Buildings with Monoslope, Pitched, or Troughed Free Roofs, MWFRS / 55
 
6 REGULAR APPROACH: LOW-RISE BUILDINGS, PARAPETS, OVERHANGS (''ENVELOPE'' PROCEDURE), MWFRS 57
 
6.1 Net Pressures on Walls and Roof / 57
 
6.2 Comparison Between Results Based on ASCE Sects. 27.4.1 and 28.4.1 / 62
 
6.3 Regular Approach: Parapets and Roof Overhangs, MWFRS / 63
 
7 REGULAR APPROACH: STRUCTURES OTHER THAN BUILDINGS, MWFRS 65
 
7.1 Solid Freestanding Walls and Solid Signs / 65
 
7.2 Open Signs, Lattice Frameworks, Trussed Towers / 69
 
7.3 Chimneys, Tanks, Rooftop Equipment, and Similar Structures / 74
 
7.4 Solid Attached Signs / 75
 
7.5 Rooftop Structures and Equipment on Buildings / 77
 
8 SIMPLIFIED APPROACH: ENCLOSED SIMPLE DIAPHRAGM BUILDINGS, PARAPETS, OVERHANGS (MWFRS) 81
 
8.1 Simplified Approach: Class 1 Buildings, Walls and Roof, MWFRS / 81
 
8.2 Simplified Approach: Parapets, MWFRS / 85
 
8.3 Simplified Approach: Roof Overhangs, MWFRS / 85
 
8.4 Simplified Approach: Class 2 Buildings, Walls and Roof, MWFRS / 86
 
8.5 Simplified Approach: Simple Diaphragm Low-Rise Buildings, MWFRS / 90
 
9 REGULAR AND SIMPLIFIED APPROACHES: C&C 95
 
9.1 Introduction / 95
 
9.2 Regular Approach / 95
 
9.3 Simplified Approaches / 105
 
PART III WIND ENGINEERING FUNDAMENTALS 107
 
10 ATMOSPHERIC CIRCULATIONS 109
 
10.1 Atmospheric Hydrodynamics / 109
 
10.2 Windstorms / 113
 
11 THE ATMOSPHERIC BOUNDARY LAYER 117
 
11.1 Wind Speeds and Averaging Times / 118
 
11.2 Wind Speed Profiles / 121
 
11.3 Atmospheric Turbulence / 130
 
12 EXTREME WIND SPEEDS AND WIND-INDUCED EFFECTS 137
 
12.1 Wind Speed Data / 138
 
12.2 Cumulative Distributions, Exceedance Probabilities, Mean Recurrence Intervals / 141
 
12.3 Parametric Estimates of N-Year Wind Speeds; Closed Form Estimators; Software / 143
 
12.4 Probabilistic Estimates of Wind Effects Based on Nondirectional and Directional Wind Speed Data / 149
 
12.5 Development of Directional Databases of Hurricane Wind Speeds / 153
 
12.6 Development of Directional Databases of Non-Hurricane Wind Speeds / 155
 
12.7 Non-Parametric Statistics, Application to One-Dimensional Time Series / 157
 
12.8 Error Estimates