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ASCE MOP 136 2018

ASCE MOP 136 2018

$59.58

ASCE Manuals and Reports on Engineering Practice No. 136: Concrete Foundations for Turbine Generators – Analysis, Design, and Construction

Published By Publication Date Number of Pages
ASCE 2018 267
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Sponsored by the Energy Division of ASCE

The design of turbine-generator foundations requires advanced technical expertise in structural engineering and soil dynamics, as well as close collaboration with manufacturers, mechanical and electrical engineers, and plant designers. Various manufacturers have different requirements for such foundations, and application of code provisions can demand a significant degree of interpretation. Concrete Foundations for Turbine Generators: Analysis, Design, and Construction provides the practical assistance needed by structural engineers and facility owners to meet these challenges with the most up-to-date and reliable information available.

This Manual of Practice addresses the design of three types of concrete foundations for turbine generators: block foundations, with pedestals, piers, and blocks supported on a common mat foundation (basemat); elevated space-frame pedestal foundations, with columns, walls, and a tabletop supported on the basemat; and foundations where equipment or structural elements are supported on a vibration-isolation system.

Topics include turbine generator equipment, foundation layout and sizing, foundation loads and load combinations, modeling of soil and pile response to dynamic loads, finite element modeling, serviceability analysis and acceptance criteria, strength and stability design, embedded items, vibration-isolated foundations, and construction considerations. Three appendixes on dynamic impedance discuss soil-supported rigid foundations, pile-supported foundations, and calculation examples.

MOP 136 delivers state-of-the-practice guidance on turbine-generator foundations for structural design engineers, operating company personnel responsible for establishing structural design criteria and construction standards, and local building officials.

PDF Catalog

PDF Pages PDF Title
1 Mop_136
_online.pdf
4 MANUALS AND REPORTS ON ENGINEERING PRACTICE
6 CONTENTS
10 PREFACE
12 ACKNOWLEDGMENTS
14 CHAPTER 1: INTRODUCTION

1.1 Background
15 1.2 Purpose

1.3 Scope and Limitations
17 1.4
Abbreviations and Acronyms
18 1.5
Foundation Terms
19 References
20 CHAPTER 2: TURBINE GENERATOR EQUIPMENT

2.1
Introduction
2.2
Main Components
22 2.3
Layout Configurations
27 2.4
Foundation Design Information
2.5
Installation
2.6
Operation
28 CHAPTER 3: PRELIMINARY TURBINE GENERATOR FOUNDATION LAYOUT AND SIZING

3.1
Introduction
3.2 Foundation Types and General Design Information
32 3.3
Preliminary Design: Initial Foundation Sizing
40 3.4
Pile Layout
41 References
44 CHAPTER 4: FOUNDATION LOADS AND LOAD COMBINATIONS

4.1
Introduction
45 4.2 Foundation and Equipment Self-Weights (Dead Loads)

4.3
Equipment Loads during Normal Operation
56 4.4
Emergency Operation Loads
57 4.5
Catastrophic Equipment Loads
59 4.6
Environmental Loads
60 4.7
Installation and Maintenance Loads
61 4.8
Concrete Shrinkage and Creep Effects
62 4.9
Load Combination Considerations
68 References
70 CHAPTER 5: MODELING OF THE SOIL AND PILE RESPONSE TO DYNAMIC LOADS

5.1
Introduction
75 5.2
Dynamic Impedance Definition
80 5.3
Dynamic impedance of rigid foundations
85 5.4
Dynamic Impedance of Flexible Foundations
89 5.5
Pile-Supported Foundations
92 5.6
Evaluation of Soil Parameters
93 References
96 CHAPTER 6: FINITE ELEMENT MODELING

6.1
Introduction
97 6.2
General Modeling Considerations
99 6.3
Element Selection
104 6.4
Mesh Sensitivity
105 6.5
Geometry Modeling
107 6.6
Boundary Condition Modeling
110 6.7
Mass Modeling
111 6.8
Load Modeling
6.9
Damping Modeling
112 6.10
Sectional and Material Properties
6.11
Model Verification
6.12
Averaging of FE Results
113 References
116 CHAPTER 7: SERVICEABILITY ANALYSIS AND ACCEPTANCE CRITERIA

7.1
Introduction
7.2
Dynamic Serviceability Analysis
124 7.3
Static Serviceability Analysis
128 7.4
Serviceability Acceptance Criteria
134 References
136 CHAPTER 8: STRENGTH AND STABILITY DESIGN

8.1
Introduction
8.2
Load Combinations for Strength Design
137 8.3 Seismic Load and Ductile Design Considerations
139 8.4 Redundancy Factor (ρ) and Overstrength Factor (Ωₒ)

8.5
Accidental Torsion
140 8.6
FE Results for Strength Design
8.7
Basemat Reinforcement Design
141 8.8 Column, Block, Pier, and Wall Reinforcement Design
142 8.9
Tabletop Reinforcement Design
144 8.10
Additional Reinforcement Requirements
8.11
Volumetric Reinforcements
145 8.12
Pile Capacity Check
146 8.13
Soil-Bearing Pressure Check
8.14
Stability Evaluation
References
148 CHAPTER 9: EMBEDDED ITEMS

9.1
Introduction
9.2
Types of Embedded items in Turbine Generator Foundations
155 9.3 Structural Design for Embedded Items
166 9.4
Grout Pockets, Grout Dams, and Grout
169 References
172 CHAPTER 10: VIBRATION ISOLATED FOUNDATIONS

10.1
Introduction
174 10.2
Design Properties of Spring Elements and Viscous Dampers
177 10.3
Typical Layout of VIS for Large STG Foundations
10.4
Dynamic Characteristics of Elastically Supported TG Foundations
179 10.5
Operational Behavior
183 10.6
Emergency Conditions
10.7
Seismic Considerations
186 10.8
Spring-Mounted Condensers
187 10.9 Gas Turbine Foundations
188 10.10
Retrofit of Turbine Foundations
10.11
Selective Application Examples
189 10.12
Special Considerations for TG Foundations with VIS
192 References
194 CHAPTER 11: CONSTRUCTION CONSIDERATIONS

11.1
Introduction
11.2
Construction Joints
195 11.3 Construction
Tolerances
11.4
Concrete Placement
198 11.5
Modularization
199 11.6
Post-Installed Anchors and Interference with Reinforcement
201 11.7
Temporary Construction Loads
11.8
Condenser Installation
203 11.9
Adjustable Vertical Support Devices
206 11.10 Stay-in-Place Formwork
207 References
208 APPENDIXES

APPENDIX A: DYNAMIC IMPEDANCE OF SOIL-SUPPORTED RIGID FOUNDATIONS

A.1 Dynamic Impedance Formulas for Rigid Foundations on Homogeneous Soil
213 A.2 Impedance Functions of Rigid Foundations Using
the Cone Model Approach
219 References
220 APPENDIX B: DYNAMIC IMPEDANCE OF PILE-SUPPORTED FOUNDATIONS

B.1 Impedance Functions of Single Piles on Homogeneous
and Parabolic Soil Profiles
223 B.2 Dynamic Impedance of Pile Groups
228 References
230 APPENDIX C: DYNAMIC IMPEDANCE CALCULATION EXAMPLES

C.1 Vertical Response of a Rigid Foundation
231 C.2 Horizontal and Rocking Response of a Rigid
Foundation
233 C.3 Dynamic Impedances of Surface Foundation
237 C.4 Pile Group Effects
245 C.5 Dynamic Impedance of a Large Pile Group
251 C.6 Negative Dynamic Impedance
255 References
258 INDEX

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ASCE MOP 136 2018
$59.58