Description
Book SynopsisSeismic Design and Analysis of Tanks A detailed view on the effects of seismic activity on tank structures As the use of above-ground and underground storage tanks (ASTs and USTs) continues to growwith approximately 545,000 in the USA alonethe greatest threat to ASTs and USTs is earthquakes, causing the contamination of groundwater, a vital source of drinking water throughout the world. These tanks suffer a great deal of strain during an earthquake, as a complicated pattern of stress affects them, such that poorly designed tanks have leaked, buckled, or even collapsed during seismic events. Furthermore, in oil and gas industrial plants, the risk of damage is even more critical due to the effects of explosion, collapse, and air or soil contamination by chemical fluid spillages. Seismic Design and Analysis of Tanks provides the first in-depth discussion of the principles and applications of shell structure design and earthquake engineering analyses focused on tank structures, and it expl
Table of ContentsPreface xi
Acknowledgments xiii
Introduction xv
1 Appealing shell structures 1
1.1 Beams and arches . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Plates and vaults . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Rectangular and cylindrical tanks . . . . . . . . . . . . . . . . . . 12
1.4 Seismic behaviour of tanks . . . . . . . . . . . . . . . . . . . . . 23
1.5 Field observation of damage to tanks induced by seismic events 38
1.6 Design consideration . . . . . . . . . . . . . . . . . . . . . . . . . 48
1.7 A simplified description of seismic response of tanks . . . . . . . 57
1.8 Discussion on existing codes . . . . . . . . . . . . . . . . . . . . . 60
1.9 Content of the book . . . . . . . . . . . . . . . . . . . . . . . . . 66
2 Above ground anchored rigid tanks 67
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
2.2 Circular vertical anchored tanks . . . . . . . . . . . . . . . . . . . 68
2.2.1 Impulsive pressure component . . . . . . . . . . . . . 71
2.2.2 Convective pressure component . . . . . . . . . . . . 81
2.2.3 Effects of vertical component of the seismic action . 89
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2.2.4 Effects of tank inertia . . . . . . . . . . . . . . . . . . 92
2.2.5 Periods of vibration . . . . . . . . . . . . . . . . . . . 93
2.2.6 Effects of liquid viscosity . . . . . . . . . . . . . . . . 99
2.2.7 Effects of inhomogeneous liquids . . . . . . . . . . . 102
2.2.8 Convective wave displacement and pressure . . . . . 111
2.2.9 Combination of pressures and behavior factor . . . . 118
2.2.10 Tank forces and stresses . . . . . . . . . . . . . . . . 124
2.2.11 Effects of rocking motion . . . . . . . . . . . . . . . . 131
2.3 Rectangular anchored tanks . . . . . . . . . . . . . . . . . . . . . 136
2.3.1 Impulsive and convective pressure components . . . 136
2.3.2 Periods of vibration . . . . . . . . . . . . . . . . . . . 141
2.3.3 Convective wave displacement . . . . . . . . . . . . . 143
2.3.4 Tank forces and stresses . . . . . . . . . . . . . . . . 143
3 Above ground unanchored rigid tanks 149
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149
3.2 Vertical cylindrical tanks . . . . . . . . . . . . . . . . . . . . . . . 153
3.2.1 Axial membrane stress in shell wall . . . . . . . . . . 161
3.2.2 Shell uplift . . . . . . . . . . . . . . . . . . . . . . . . 165
3.2.3 Radial membrane stress at base . . . . . . . . . . . . 167
3.2.4 Plastic rotation at base . . . . . . . . . . . . . . . . . 168
3.3 Rectangular tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
4 Elevated tanks 175
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4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
4.2 Single lumped-mass model . . . . . . . . . . . . . . . . . . . . . . 182
4.3 Two uncoupled mass model . . . . . . . . . . . . . . . . . . . . . 186
4.4 Two coupled masses model . . . . . . . . . . . . . . . . . . . . . 190
5 Flexible tanks 201
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
5.2 Impulsive pressure component . . . . . . . . . . . . . . . . . . . . 205
5.2.1 Vertical cylindrical tanks . . . . . . . . . . . . . . . . 205
5.2.2 Rectangular tanks . . . . . . . . . . . . . . . . . . . . 219
5.3 Effects of vertical component of the seismic action . . . . . . . 226
5.4 Periods of vibration . . . . . . . . . . . . . . . . . . . . . . . . . . 231
5.5 Combination of pressures . . . . . . . . . . . . . . . . . . . . . . 246
5.6 Tank forces and stresses . . . . . . . . . . . . . . . . . . . . . . . 255
5.6.1 Vertical cylindrical tanks . . . . . . . . . . . . . . . . 257
5.6.2 Rectangular tanks . . . . . . . . . . . . . . . . . . . . 270
5.7 Effects of rocking motion . . . . . . . . . . . . . . . . . . . . . . 272
6 Other peculiar principles 277
6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
6.2 Effects of soil–structure interaction . . . . . . . . . . . . . . . . . 278
6.3 Flow-dampening devices . . . . . . . . . . . . . . . . . . . . . . . 288
6.4 Base-isolation devices . . . . . . . . . . . . . . . . . . . . . . . . 302
6.5 Underground rigid tanks . . . . . . . . . . . . . . . . . . . . . . . 313
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6.6 Horizontal tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
6.7 Conical tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
7 General design principles 333
7.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
7.2 Requirements for steel tanks . . . . . . . . . . . . . . . . . . . . 334
7.2.1 Base plate . . . . . . . . . . . . . . . . . . . . . . . . 335
7.2.2 Sidewall . . . . . . . . . . . . . . . . . . . . . . . . . . 339
7.2.3 Openings . . . . . . . . . . . . . . . . . . . . . . . . . 348
7.2.4 Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
7.2.5 Foundation . . . . . . . . . . . . . . . . . . . . . . . . 362
7.2.6 Stiffeners . . . . . . . . . . . . . . . . . . . . . . . . . 373
7.2.7 Buckling limit state . . . . . . . . . . . . . . . . . . . 406
7.3 Requirements for concrete tanks . . . . . . . . . . . . . . . . . . 423
7.3.1 Serviceability limit state . . . . . . . . . . . . . . . . 425
7.3.2 Ultimate limit state . . . . . . . . . . . . . . . . . . . 435
7.3.3 Detailing and particular rules . . . . . . . . . . . . . . 436
A Dimensionless design charts 463
A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 463
B Codes, Manuals, Recommendations, Guidelines, Reports 471
B.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 471
Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486
