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ACI 307 08 2008

ACI 307 08 2008

$35.48

307-08: Code Requirements for Reinforced Concrete Chimneys (ACI 307-08) and Commentary

Published By Publication Date Number of Pages
ACI 2008 34
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This code gives material, construction, and design requirements for cast-in-place and precast reinforced concrete chimneys. It sets forth minimum loadings for design and contains methods for determining the concrete and reinforcement required as a result of these loadings. The method of analysis applies primarily to circular chimney shells; however, a general procedure for analysis of noncircular shapes is included. Equations are provided for determining the temperature gradient through the concrete resulting from the difference in temperature of the gases inside the chimney and the surrounding atmosphere. Methods for combining the effects of dead and wind (or earthquake) loads with temperature, both vertically and circumferentially, are included in this code. These methods permit the licensed design professional to establish minimum concrete and reinforcement requirements. The Commentary discusses some of the background and considerations of Committee 307 in developing the provisions contained in “Code Requirements for Reinforced Concrete Chimneys (ACI 307-08).” Two appendixes provide the derivation of the equations for nominal strength and temperature stresses. Commentary provisions begin with an “R,” such as “R1.1.1,” and are shown in italics. Keywords: chimneys; compressive strength; concrete construction; earthquake- resistant structures; formwork (construction); foundations; high temperature; linings; loads (forces); moments; openings; precast concrete;quality control; reinforced concrete; reinforcing steels; specifications; static loads; strength; structural analysis; structural design; temperature; thermal gradient; wind pressure.

PDF Catalog

PDF Pages PDF Title
3 CONTENTS
4 R0— INTRODUCTION
5 CHAPTER 1— GENERAL
1.1— Scope
6 1.2—Drawings
1.3—Regulations
1.3.1
1.3.2
1.4—Notation
9 CHAPTER 2— MATERIALS
2.1— General
2.2—Cement
2.3—Aggregates
2.3.1
2.3.2
R2.3.2
2.4—Reinforcement
R2.4
CHAPTER 3— CONSTRUCTION REQUIREMENTS
3.1— General
3.2—Concrete strength
3.3—Strength tests
R3.3
3.4—Forms
R3.4
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.5—Reinforcement placement
R3.5
3.5.1
R3.5.1
3.5.2
R3.5.2
3.5.3
3.5.4
10 3.6—Concrete placement
3.7—Concrete curing
3.7.1
3.7.2
3.8—Construction tolerances
R3.8
3.8.1
3.8.1.1 Vertical alignment of centerpoint
3.8.1.2 Diameter
3.8.1.3 Wall thickness
3.8.2 Openings and embedments
3.9—Precast erection
3.9.1
3.9.2
CHAPTER 4— LOADS AND GENERAL DESIGN CRITERIA
4.1— General
R4.1
4.1.1
4.1.2
4.1.3 Minimum shell thickness
R4.1.3.1
4.1.3.2
R4.1.3.2
11 4.1.3.3
4.1.4 Shell and liner interaction
4.1.5 Design for temporary construction loads
4.1.6 Foundation considerations
4.1.6.1
R4.1.6.1
4.1.6.2
R4.1.6.2 Foundation design
4.1.6.3
4.1.6.4
4.2—Wind loads
4.2.1 General
R4.2.1
4.2.2 Along-wind load: circular shapes
12 R4.2.2
4.2.3
R4.2.3
13 4.2.3.1 General
4.2.3.2 Analysis
14 4.2.3.3 Second mode
4.2.3.4 Grouped chimneys
R4.2.3.4
15 4.2.3.5 Combination of across-wind and along-windloads
4.2.4 Circumferential bending
R4.2.4
4.2.5 Wind loads: noncircular shapes
4.3—Earthquake loads
R4.3
4.3.1 General
R4.3.1
4.3.2 Dynamic response spectrum analysis method
16 R4.3.2
4.3.2.1 General procedure
17 4.3.2.2 Site-specific procedure
R4.3.2.2
4.3.3 Time-history analysis
R4.3.3
4.3.4 Soil-structure interaction
R4.3.4
4.3.5 Lateral displacements
R4.3.5
4.3.6 P-Δ effect
4.4—Special design considerations and requirements
4.4.1
4.4.2
4.4.3
R4.4.3
4.4.4
R4.4.4
18 4.4.5
4.4.6
R4.4.6
4.4.7
4.4.8
19 4.4.9
4.5—Wind deflection criteria
R4.5
CHAPTER 5— DESIGN OF CHIMNEY SHELLS: STRENGTH METHOD
5.1—General
R5.1
5.1.1
5.1.2
R5.1.2
5.1.3
5.1.4
5.2—Design loads
5.2.1
5.3—Required strength
5.3.1
R5.3.1
20 5.3.2
R5.3.2
5.4—Design strength
5.4.1
R5.4.1
5.5—Nominal moment strength: circular shells
R5.5
5.5.1
22 R5.5.1 Parameter Q
5.5.2
23 5.5.3 Openings in tension zone
5.5.4 Openings in compression zone
5.5.5 Limitation
5.5.6 Calculation procedure
R5.5.6
5.5.7
5.5.8 Special considerations
R5.5.8
5.6—Noncircular shapes
5.6.1 General
5.6.2 Design assumptions
5.6.3 Calculation procedure
5.6.4 Horizontal bending
5.7—Design for circumferential bending
5.7.1
5.7.2
24 R5.7.2
CHAPTER 6— THERMAL STRESSES
6.1—General
R6.1
6.1.1
6.2—Vertical temperature stresses
6.2.1
6.2.2
R6.2.2
25 6.2.3
6.3—Circumferential temperature stresses
6.3.1
6.3.2
CHAPTER 7— REFERENCES
7.1— Referenced standards
26 R7.1 Referenced standards and reports
R7.2 Cited references
27 APPENDIX A— DERIVATION OF EQUATIONS FOR NOMINAL STRENGTH
31 APPENDIX B— DERIVATION OF EQUATIONS FOR TEMPERATURE STRESSES

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ACI 307 08 2008
$35.48