Building Code Requirements and Commentary for Structural Concrete (ACI 318-19)

Front Matter......Page 3
Keywords......Page 5
Introduction......Page 6
Table of Contents......Page 7
1.3—Purpose......Page 11
1.4—Applicability......Page 12
1.5—Interpretation......Page 14
1.8—Construction documents and design records......Page 15
1.10—Approval of special systems of design, construction, or alternative construction materials......Page 16
2.2—Notation......Page 17
2.3—Terminology......Page 33
3.2—Referenced standards......Page 49
4.3—Design loads......Page 53
4.4—Structural system and load paths......Page 54
4.5—Structural analysis......Page 56
4.6—Strength......Page 57
4.10—Structural integrity......Page 58
4.12—Requirements for specific types of construction......Page 59
4.14—Strength evaluation of existing structures......Page 61
5.2—General......Page 63
5.3—Load factors and combinations......Page 64
6.2—General......Page 69
6.3—Modeling assumptions......Page 74
6.4—Arrangement of live load......Page 75
6.5—Simplified method of analysis for nonprestressed continuous beams and one-way slabs......Page 76
6.6—Linear elastic first-order analysis......Page 77
6.7—Linear elastic second-order analysis......Page 86
6.8—Inelastic analysis......Page 87
6.9—Acceptability of finite element analysis......Page 88
7.3—Design limits......Page 91
7.5—Design strength......Page 93
7.6—Reinforcement limits......Page 94
7.7—Reinforcement detailing......Page 96
8.2—General......Page 101
8.3—Design limits......Page 102
8.4—Required strength......Page 105
8.5—Design strength......Page 111
8.6—Reinforcement limits......Page 112
8.7—Reinforcement detailing......Page 115
8.8—Nonprestressed two-way joist systems......Page 127
9.2—General......Page 129
9.3—Design limits......Page 130
9.4—Required strength......Page 132
9.5—Design strength......Page 135
9.6—Reinforcement limits......Page 137
9.7—Reinforcement detailing......Page 141
9.8—Nonprestressed one-way joist systems......Page 153
9.9—Deep beams......Page 154
10.3—Design limits......Page 157
10.4—Required strength......Page 158
10.5—Design strength......Page 159
10.7—Reinforcement detailing......Page 160
11.2—General......Page 167
11.4—Required strength......Page 168
11.5—Design strength......Page 169
11.6—Reinforcement limits......Page 172
11.7—Reinforcement detailing......Page 173
11.8—Alternative method for out-of-plane slender wall analysis......Page 174
12.1—Scope......Page 177
12.2—General......Page 178
12.3—Design limits......Page 179
12.4—Required strength......Page 180
12.5—Design strength......Page 183
12.7—Reinforcement detailing......Page 190
13.1—Scope......Page 193
13.2—General......Page 195
13.3—Shallow foundations......Page 199
13.4—Deep foundations......Page 201
14.1—Scope......Page 205
14.3—Design limits......Page 206
14.4—Required strength......Page 208
14.5—Design strength......Page 209
14.6—Reinforcement detailing......Page 212
15.2—General......Page 213
15.3—Detailing of joints......Page 214
15.4—Strength requirements for beam-column joints......Page 215
15.5—Transfer of column axial force through the floor system......Page 216
16.2—Connections of precast members......Page 219
16.3—Connections to foundations......Page 224
16.4—Horizontal shear transfer in composite concrete flexural members......Page 227
16.5—Brackets and corbels......Page 229
17.1—Scope......Page 235
17.2—General......Page 236
17.3—Design Limits......Page 237
17.5—Design strength......Page 238
17.6—Tensile strength......Page 248
17.7—Shear strength......Page 263
17.9—Edge distances, spacings, and thicknesses to preclude splitting failure......Page 272
17.10—Earthquake-resistant anchor design requirements......Page 274
17.11—Attachments with shear lugs......Page 279
18.2—General......Page 287
18.3—Ordinary moment frames......Page 293
18.4—Intermediate moment frames......Page 294
18.6—Beams of special moment frames......Page 301
18.7—Columns of special moment frames......Page 307
18.8—Joints of special moment frames......Page 313
18.9—Special moment frames constructed using precast concrete......Page 316
18.10—Special structural walls......Page 319
18.12—Diaphragms and trusses......Page 338
18.13—Foundations......Page 345
18.14—Members not designated as part of the seismic-force-resisting system......Page 353
19.2—Concrete design properties......Page 357
19.3—Concrete durability requirements......Page 359
19.4—Grout durability requirements......Page 371
20.2—Nonprestressed bars and wires......Page 373
20.3—Prestressing strands, wires, and bars......Page 380
20.5—Provisions for durability of steel reinforcement......Page 384
20.6—Embedments......Page 392
21.2—Strength reduction factors for structural concrete members and connections......Page 393
22.2—Design assumptions for moment and axial strength......Page 399
22.3—Flexural strength......Page 401
22.4—Axial strength or combined flexural and axial strength......Page 402
22.5—One-way shear strength......Page 403
22.6—Two-way shear strength......Page 413
22.7—Torsional strength......Page 422
22.8—Bearing......Page 430
22.9—Shear friction......Page 432
23.1—Scope......Page 437
23.2—General......Page 438
23.4—Strength of struts......Page 445
23.5—Minimum distributed reinforcement......Page 447
23.6—Strut reinforcement detailing......Page 448
23.8—Tie reinforcement detailing......Page 449
23.9—Strength of nodal zones......Page 450
23.10—Curved-bar nodes......Page 451
23.11—Earthquake-resistant design using the strut-and-tie method......Page 454
24.2—Deflections due to service-level gravity loads......Page 457
24.3—Distribution of flexural reinforcement in one-way slabs and beams......Page 462
24.4—Shrinkage and temperature reinforcement......Page 463
24.5—Permissible stresses in prestressed concrete flexural members......Page 465
25.2—Minimum spacing of reinforcement......Page 469
25.3—Standard hooks, seismic hooks, crossties, and minimum inside bend diameters......Page 471
25.4—Development of reinforcement......Page 473
25.5—Splices......Page 490
25.6—Bundled reinforcement......Page 495
25.7—Transverse reinforcement......Page 496
25.8—Post-tensioning anchorages and couplers......Page 506
25.9—Anchorage zones for post-tensioned tendons......Page 507
26.1—Scope......Page 517
26.2—Design criteria......Page 518
26.4—Concrete materials and mixture requirements......Page 519
26.5—Concrete production and construction......Page 530
26.6—Reinforcement materials and construction requirements......Page 537
26.7—Anchoring to concrete......Page 542
26.8—Embedments......Page 544
26.9—Additional requirements for precast concrete......Page 545
26.10—Additional requirements for prestressed concrete......Page 546
26.11—Formwork......Page 548
26.12—Evaluation and acceptance of hardened concrete......Page 550
26.13—Inspection......Page 556
27.2—General......Page 561
27.3—Analytical strength evaluation......Page 562
27.4—Strength evaluation by load test......Page 563
27.5—Monotonic load test procedure......Page 564
27.6—Cyclic load test procedure......Page 566
A.2—Scope......Page 569
A.4—Earthquake ground motions......Page 570
A.6—Modeling and analysis......Page 571
A.7—Action classification and criticality......Page 572
A.8—Effective stiffness......Page 573
A.9—Expected material strength......Page 575
A.10—Acceptance criteria for deformation-controlled actions......Page 576
A.11—Expected strength for force-controlled actions......Page 578
A.12—Enhanced detailing requirements......Page 579
A.13—Independent structural design review......Page 580
Appendix B—Steel Reinforcement Information......Page 583
Appendix C—Equivalence Between SI-Metric, MKS-Metric, And U.S. Customary Units of Nonhomogenous Equations in the Code
......Page 587
Commentary References......Page 597
Index......Page 617