Download Earthquake Engineering: Application to Design PDF

TitleEarthquake Engineering: Application to Design
PublisherWiley
ISBN 139780470048436
Author
LanguageEnglish
File Size5.7 MB
Total Pages443
Table of Contents
                            Cover
Contents
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Index
                        
Document Text Contents
Page 2

EARTHQUAKE ENGINEERING

Earthquake Engineering: Application to Design. Charles K. Erdey
Copyright  2007 John Wiley & Sons, Inc. ISBN: 978-0-470-04843-6

Page 221

206 MASONRY STRUCTURES

Design of 18-in. RC Wall

M � 378 k-in.u

Try #6 at 12 in. plus #6 at 24 in. OC alternating:

1 2–A � (0.6 � 0.44) � 0.52 in.s 2

�M � 0.9 � 0.52 � 60 � (0.875 � 15.62)n

� 392.0 k-in. � 378 k-in. OK

Design the footing at strength level:

2 20.6 � 7.0 (2.27 � 0.6) � 7.0
M � � � 42.0 k-ft � 503 k-in.u 2 3

The amount of reinforcement provided is as follows:

2From concrete stem wall: #6 @ 12 in. OC 0.6 in.
2From 16-in. CMU: #6 @ 24 in. OC 0.3 in.
20.9 in.

�M � 0.9 � (0.9 � 60) � (0.875 � 14.62)n

� 622.0 k-in. � 503 k-in. OK

7.3 CASE 2: SEISMIC VERSUS WIND

Seismic: Low to Moderate Seismicity area

The following engineering calculations were done for a real project.
Despite comparatively high winds in a relatively low seismicity area,
seismic governed over wind in this case study.

PROJECT DESCRIPTION

The subject structure is a reinforced masonry hangar (Figures 7.5 and
7.6).

Page 222

7.3 CASE 2: SEISMIC VERSUS WIND 207

Figure 7.5 Partial view of the hangar during construction.

Figure 7.6 Partial roof plan of the masonry hangar with continuous tie at centerline
of building.

Page 442

INDEX 427

No necking, no ductility, 351
Northridge experience, 68
Northridge lesson, 228

O
Occupancy category, 30
Oscillation, 322
Out-of-plane bending, 13, 352
Overdamped system, 322
Overstressed joint, 348
Overstressed structure, 229
Overturning

factor of safety, 203
and hold-down bolts, 244
moment, 196

P
Pacific tectonic plate edge, 192
Pacoima dam readings, 22, 100
Pad footing, 226, 272, 276
Panel zone, 87, 88, 90, 347, 350
Panel zone shear strength, 101
Parapet, 219
Parent metal brittleness, 351
Parking structures, 49
Particular solution, 303
Paso Robles Clock Tower, 192
Permanent deformation, 348
Permanent structural damage, 344
Perry, C., 183
Pister, K. S., 182
Plastic deformation, 351
Plastic hinge, 344
Popov, E. P., 127, 182
Post and pier supports, 228
Postbuckling, 171
Postbuckling stage, 170
Potential energy absorption, 181
Precast concrete circular plate, 214

Q
Quasi-static tests, 349, 351

R
RC parking structure, 49
Redundant backup system, 189
Reinforcement

effective depth, 205
overstressed, 222

Reinforcing bars, 37

Reliability / redundancy factor �, 86
braced frames, 141

Reserve shearing resistance, 98
Reserve strength, 21
Resonance factor, 26
Response spectrum analysis, 138
Restoring moment, 203
Retaining wall

10 ft, 196
13 ft, 199
15 ft high, 203
seismic zones 3 and 4, 193

Reversals of magnitude, 351
Reversible earthquake forces, 142
R factor, 34
Rigid joint, 348
Ring foundation, 216

S
Sabol, T. A., 127
SAC 95-01, 1995, 358
San Fernando earthquake, 13, 21, 22,

23
Santa Monica seismic motion, 338
Scalar number, 293
Section neutral axis, 198
Seismic design forces, zone 2B, 218
Seismic design philosophy, 68
Seismic isolation, primer on, ASCE,

SEI 2004, 353
Seismic isolation systems, 353
Seismic pressure on component, 219
Seismic, transverse direction, 249
Seismic not governing, 261
Seismic versus wind, 206
Seismograph readings, 51, 338, 345
Shear

and compression, 45
and flexural resistance, 46
and moment combined, 46
reinforcement, 46

Shear tab, 17
design, 96
moment of resistance, 17

Shear tabs cracked and split, 105
Shear wall pier, 244
Shearing resistance, see Combined

bending and shearing resistance
Shift of force in tensile

reinforcement, 43

Page 443

428 INDEX

Shrinkage, 51
Significant U.S. earthquakes, 8
Single-degree system, 314
Single-direction oriented lateral

forces, 143
Single spring–mass differential

equation, 318
Slenderness ratio, 138
Speed straining, 350
Spring coefficient, 316
Spring constant, 314
Spring–mass–dashpot, 327
Square matrix, 295
Static force method, 138
Steel, modulus of elasticity, 85
Steel portal frame, 234
Steel-reinforced

duplex, 252
wood-framed building, 237

Steel reinforcement, 36
Stephen, R. M., 127
Stirrups in resisting moment, 46
Stirrup sizes, 45
Stirrup spacing, 45
Story-drift control, 83
Strain hardening, 350
Strength design, 45
Strength-level bearing pressures, 199
Strength-level factored loads, 83
Stress reversals, 135, 138, 179, 350,

351
Stress values, masonry project, 220
Strong column–weak beam, 113
Structural details, 223
Structural displacement, increase, 344
Structural layout and member sizes,

70
Structural vibrations, 314
Stucco and wood frame, 229
Sunset Crater volcano, 5
Sway components due to rocking

motion, 343

T
Tang, X., 182
T-assembly static moment, 242
Tectonic plate edge, 192
Tensile reinforcement, shift of force,

43
Tensile strength by yielding, 94

Tensile stress, 195
Thornton, W. A., 183
Tilt-up walls, 49
Toe nailing, 233
Toe of footing design, 198
Tognarelli, M., 183
Transfer of overturning moment, 14
Triangular distribution, 204
Tsai, K. C., 127

U
Uang, C. M., 127, 182, 358
Ultimate strength design, 41
Unique continuous solution, 305
University of Michigan, 128, 181

V
Vaulted ceilings, 234
Vector matrix, 290
Vertical reinforcement, 13, 194, 196,

197, 201, 209
Viscoelastic devices, 352, 353
Viscous damping force, 321
Viscous devices, 352
Vulcraft joists, 217, 223

W
Water–cement ratio, 37
Web joint, welding, 98
Wegener, A., 3
Wenger, W. A., 182
Whittaker, A. S., 182
Whittier Narrows earthquake, 1987,

20, 21
Width-to-wall thickness ratio, 138
Wind

and earthquake loads, 135
normal force method, 72
projected-area method, 72
on three-story steel frame, 238

Wood frame/masonry chimney
incompatibility, 235

Wood-framed seismic performance,
227

Wood-framed structure failures, 228
Wronski, 334

Z
Zekioglu, A., 358
Z zone factor, 25

Similer Documents