ITG-9R-16: Report on Design of Concrete Wind Turbine Towers

ITG-9R-16: Report on Design of Concrete Wind Turbine Towers

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Description

This report examines the benefits of the design of concrete towers for land-based wind turbines with heights in excess of 325 ft (100 m), in comparison to those of round steel tubular towers. These benefits include reduced cost, increased stiffness, and superior service life performance. Construction alternatives, design criteria, design methodologies, and guidance for preliminary design of concrete towers are presented.

The report recognizes that final tower design requires close coordination with the turbine supplier. The report is intended for those involved in developing preliminary tower designs. Concrete towers designed for maximum wind forces can be satisfactory for preliminary design, but the final design requires checking for all loads, especially fatigue and dynamic effects from wind and turbine operations. Design of connections and their proportions require an understanding of fatigue requirements during preliminary design for the connection design to remain valid during final checks.

Keywords: concrete tower; full-height tower; hybrid tower; precast elements; prestressing; slipformed; spread footings; turbine; wind; wind farm.

Document Details

Author: ACI Committee 93

Publication Year: 2016

Pages: 24.00

ISBN: 9781945487354

Categories: Design

Formats: Printed Document, PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION

1.1—Introduction

1.2—Scope

CHAPTER 2—NOTATION AND DEFINITIONS

2.1—Notation

2.2—Definitions

CHAPTER 3—WIND FARM DEVELOPMENT AND TOWER SUPPLY CHAIN

3.1—Introduction

3.2—Certification and design

CHAPTER 4—CONCRETE TOWER TYPES

4.1—Hybrid concrete towers

4.2—Full-height concrete towers

4.3—Construction types

4.4—Construction considerations

4.5—Tolerances

4.6—Tower size and cost

CHAPTER 5—TOWER DESIGN

5.1—Tower frequency design

5.2—Service level design

5.3—Prestressing

5.4—Modeling

5.5—Fatigue

5.6—Preliminary design guidance

CHAPTER 6—DESIGN LOADS AND LOAD COMBINATIONS

6.1—Loads and load combinations

6.2—Load factors

CHAPTER 7—DESIGN LOADS

7.1—Basic weights and loads

7.2—Wind profile

7.3—Earthquake loads

7.4—Normal operating fatigue loads

7.5—Temperature loads

7.6—Abnormal operating conditions

CHAPTER 8—CONCRETE RESISTANCE

8.1—Strength design

8.2—Serviceability design

8.3—Joints and connections

CHAPTER 9—FOUNDATION DESIGN

9.1—Rock anchor foundations

9.2—Pier-type deep foundations

9.3—Spread footings

9.4—Termination of reinforcement and prestress

9.5—Tower-foundation structural integrity

CHAPTER 10—CONCLUSION AND RECOMMENDATIONS

CHAPTER 11—REFERENCES

Authored documents

ERRATA INFO

Any applicable errata are included with individual documents at the time of purchase. Errata are not included for collections or sets of documents such as the Manual of Concrete Practice (MCP). For a listing of and access to all product errata, visit the Errata page.

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