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ICC IBC SEAOC SSDM V3 2021

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2021 IBC SEAOC Structural/Seismic Design Manual, Volume 3: Examples for Concrete Buildings

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ICC 2021 299
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2021 IBC SEAOC Structural/Seismic Design Manual, Volume 3: Examples for Concrete Buildings This series provides a step-by-step approach to applying the structural provisions of the 2021 International Building Code and referenced standards. Volume 3 contains code application examples of concrete construction. Moment frames, braced frames, and shear wall construction are analyzed. Volume 3 details sample structures containing concrete moment frames or shear walls, diaphragm, and pile design, including: Reinforced Concrete Wall Reinforced Concrete Wall with Coupling Beams Reinforced Concrete Special Moment Frame Reinforced Concrete Parking Garage Pile Foundation Pile Foundation at SMRF Design of Concrete Diaphragm and Collector, including Alternate Method Concrete Coupling Beam An excellent reference and study guide for the NCEES Structural Exam, this manual is an invaluable resource for civil and structural engineers, architects, academics, and students.

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PDF Pages PDF Title
1 2021 IBC® SEAOC STRUCTURAL/SEISMIC DESIGN MANUAL
2 2021 IBC® SEAOC STRUCTURAL/SEISMIC DESIGN MANUAL TITLE PAGE
3 COPYRIGHT
6 TABLE OF CONTENTS
8 PREFACE TO THE 2021 IBC SEAOC STRUCTURAL/SEISMIC DESIGN MANUAL
10 PREFACE TO VOLUME 3
12 ACKNOWLEDGMENTS
14 REFERENCES
18 HOW TO USE THIS DOCUMENT
20 DESIGN EXAMPLE 1 REINFORCED CONCRETE WALL
21 1. BUILDING GEOMETRY AND LOADS
1.1 GIVEN INFORMATION
22 FIGURE 1-1. FLOOR PLAN
1.2 DESIGN LOADS AND LATERAL FORCES
23 FIGURE 1-2. WALL ELEVATION, SHEAR, AND MOMENT DIAGRAM
TABLE 1-1. DESIGN LOADS AND LATERAL FORCES
24 2. LOAD COMBINATIONS FOR DESIGN
2.1 LOAD COMBINATIONS
2.2 HORIZONTAL AND VERTICAL COMPONENTS OF EARTHQUAKE FORCE
EQUATION 12.4-1
EQUATION 12.4-2
EQUATION 12.4-3
EQUATION 12.4-4A
25 2.3 ACTIONS AT BASE OF WALL
3. PRELIMINARY SIZING OF WALL
3.1 SHEAR STRESS AND REINFORCEMENT RATIO RULES OF THUMB
26 3.2 MINIMUM THICKNESS TO PREVENT WALL BUCKLING
3.3 LAYOUT OF VERTICAL REINFORCEMENT
FIGURE 1-3. LAYOUT OF VERTICAL REINFORCEMENT AT WALL BASE
27 4. FLEXURAL STRENGTH AT BASE OF WALL
4.1 REINFORCEMENT CONSIDERED “EFFECTIVE”
4.2 ASSUMED REINFORCEMENT STRAIN
FIGURE 1-4. STEEL STRESS AND NEUTRAL AXIS DEPTH
28 4.3 STRENGTH REDUCTION FACTOR
4.4 HAND CALCULATION
29 FIGURE 1-5. FREE-BODY DIAGRAM FOR FLEXURAL STRENGTH
TABLE 1-2. FIRST ITERATION FOR C AND MN
TABLE 1-3. SECOND ITERATION FOR C AND MN
30 4.5 SPREADSHEET CALCULATION
31 FIGURE 1-6. GENERAL SPREADSHEET TO CALCULATE FLEXURAL STRENGTH
32 4.6 SOFTWARE CALCULATION
FIGURE 1-7. ANALYSIS OF WALL SECTION BY SPCOLUMN
33 5. FLEXURAL STRENGTH AND LAP SPLICES OVER HEIGHT OF WALL
5.1 BAR CUT-OFFS
FIGURE 1-8. WALL ELEVATION
34 TABLE 1-4. BOUNDARY AND VERTICAL WEB REINFORCEMENT
35 FIGURE 1-9. CALCULATION OF REQUIRED FLEXURAL STRENGTH AT BAR CUT-OFF LOCATIONS
5.2 LAP SPLICE LENGTH
36 EQUATION 25.4.2.4A
EQUATION 25.4.2.4A
37 FIGURE 1-10. DETERMINATION OF ATR /N FOR CALCULATION OF LAP-SPLICE LENGTH (ADAPTED FROM FIGURE 4 OF JIRSA ET AL [1979] AND FIGURE C7.5 OF STANDARDS NEW ZEALAND [1995])
5.3 SPLICES IN PLASTIC-HINGE REGIONS
39 6. SHEAR STRENGTH OF WALL
EQUATION 18.10.3.1
TABLE 1-5. FLEXURAL STRENGTH COMPARISON
40 EQUATION 18.10.4.1
TABLE 1-6. HORIZONTAL REINFORCEMENT
41 7. SHEAR FRICTION (SLIDING SHEAR) STRENGTH OF WALL
EQUATION 22.9.4.2
42 8. DETAILING OF WALL BOUNDARY ELEMENTS
8.1 REQUIREMENT FOR SPECIAL BOUNDARY ELEMENTS
EQUATION 18.10.6.2
8.2 DETAILING WHERE SPECIAL BOUNDARY ELEMENTS ARE NOT REQUIRED
43 FIGURE 1-11. BOUNDARY REINFORCEMENT AT WALL BASE
44 DESIGN EXAMPLE 2 REINFORCED CONCRETE WALL WITH COUPLING BEAMS
45 1. BUILDING GEOMETRY AND LOADS
1.1 GIVEN INFORMATION
46 1.2 DESIGN LOADS AND LATERAL FORCES
47 FIGURE 2-1. WALL ELEVATION, PLAN SECTION, AND DESIGN FORCES
48 FIGURE 2-2. RESULTS OF ETABS COMPUTER ANALYSIS (kips, inches)
49 2. LOAD COMBINATIONS FOR DESIGN
3. PRELIMINARY SIZING OF WALL
4. COUPLING BEAM STRENGTH AND DIAGONAL REINFORCEMENT
4.1 REQUIREMENT FOR DIAGONAL REINFORCEMENT
50 TABLE 2-1. COUPLING BEAM FORCES AND DIAGONAL REINFORCEMENT
4.2 DESIGN OF DIAGONAL REINFORCEMENT
EQUATION 18.10.7.4
51 FIGURE 2-3. GEOMETRY OF COUPLING-BEAM DIAGONAL BARS
52 FIGURE 2-4. DIAGONAL BARS PROVIDED IN COUPLING BEAMS
5. FLEXURAL REINFORCEMENT OF WALL PIERS
5.1 CRITICAL MOMENTS AND AXIAL FORCES
53 TABLE 2-2. DEAD LOAD FROM WALL SELF‑WEIGHT
TABLE 2-3. CALCULATION OF FACTORED AXIAL FORCES AND MOMENTS ON CRITICAL WALL PIERS
54 5.2 DESIGN OF VERTICAL REINFORCEMENT
FIGURE 2-5. SECTION THROUGH WALL PIER IN VICINITY OF LINE C
55 FIGURE 2-6. SPCOLUMN RESULTS FOR DESIGN OF VERTICAL REINFORCEMENT
56 FIGURE 2-6 (CONTINUED). SPCOLUMN RESULTS FOR DESIGN OF VERTICAL REINFORCEMENT
57 FIGURE 2-7. ELEVATION SHOWING VERTICAL WALL REINFORCEMENT
5.3 SPLICES OF REINFORCEMENT
58 6. PLASTIC MECHANISM ANALYSIS
6.1 PROBABLE FLEXURAL STRENGTH
59 FIGURE 2-8 SPCOLUMN CALCULATION OF PROBABLE FLEXURAL STRENGTH MPR (FY = 75 KSI,  = 1.0)
60 FIGURE 2-8 (CONTINUED). SPCOLUMN CALCULATION OF PROBABLE FLEXURAL STRENGTH MPR (FY = 75 KSI,  = 1.0)
TABLE 2-5. APPROXIMATE PROBABLE FLEXURAL STRENGTHS OF WALL PIERS FOR PLASTIC ANALYSIS
61 6.2 MECHANISM WITH HINGING AT BASE OF WALL PIERS
62 TABLE 2-6. PLASTIC MECHANISM CALCULATIONS ASSUMING PLASTIC HINGING AT BASE AND IN ALL COUPLING BEAMS(1)
63 FIGURE 2-9. MECHANISM WITH PLASTIC HINGES AT BASE OF WALL
6.3 MECHANISM WITH HINGING AT FOURTH FLOOR
64 TABLE 2-7. PLASTIC MECHANISM CALCULATIONS ASSUMING PLASTIC HINGING AT FOURTH-FLOOR PIERS(1)
65 FIGURE 2-10. MECHANISM WITH PLASTIC HINGES AT FOURTH-FLOOR WALL PIERS
66 TABLE 2-8. PLASTIC MECHANISM CALCULATIONS ASSUMING PLASTIC HINGING AT FOURTH-FLOOR PIERS—REVISED FOR STRONGER PIERS AT FOURTH FLOOR
7. SHEAR REINFORCEMENT OF WALL PIERS
67 EQUATION 18.10.4.1
68 TABLE 2-9. DESIGN FOR SHEAR BY THE BLUE BOOK RECOMMENDATIONS
8. DETAILING OF WALL-PIER BOUNDARY ELEMENTS
8.1 REQUIREMENT FOR SPECIAL BOUNDARY ELEMENTS: STRESS-BASED APPROACH
69 TABLE 2-10. STRESS ANALYSIS FOR SPECIAL BOUNDARY ELEMENT REQUIREMENT BY ACI 318
70 Table 2-10. Stress analysis for special boundary element requirement by ACI 318
FIGURE 2-11. COMPRESSIVE STRESSES (KSI) AND REQUIRED LOCATIONS OF SPECIAL BOUNDARY ELEMENTS ACCORDING TO ACI 318 SECTION 18.10.6.3
71 8.2 REQUIREMENT FOR SPECIAL BOUNDARY ELEMENTS: NEUTRAL AXIS APPROACH
TABLE 2-11. REQUIREMENT FOR SPECIAL BOUNDARY ELEMENT BY ACI 318 SECTION 18.10.6.2.
EQUATION 8.10.6.2a
72 FIGURE 2-12 REQUIRED LOCATIONS OF SPECIAL BOUNDARY ELEMENTS ACCORDING TO ACI 318 SECTION 18.10.6
FIGURE 2-12. REQUIRED LOCATIONS OF SPECIAL BOUNDARY ELEMENTS ACCORDING TO ACI 318 SECTION 18.10.6
73 8.3 DETAILING OF SPECIAL BOUNDARY ELEMENTS
TABLE 2-12. REQUIRED WIDTH AND VERTICAL EXTENT OF SPECIAL BOUNDARY ELEMENTS
74 FIGURE 2-13. BOUNDARY TIES REQUIRED BY THE ACI 318 PROCEDURE
75 TABLE 2-13. REQUIRED BOUNDARY ZONE TIES BY THE ACI 318 PROCEDURE
76 8.4 DETAILING WHERE SPECIAL BOUNDARY ELEMENTS ARE NOT REQUIRED
77 9. DETAILING OF COUPLING BEAMS
9.1 DEVELOPMENT LENGTH OF DIAGONAL REINFORCEMENT
9.2 OPTIONS FOR CONFINEMENT OF COUPLING BEAMS
9.3 OPTION 1: TIES AROUND DIAGONAL BARS
78 FIGURE 2-14. SECTION THROUGH COUPLING BEAM SHOWING LAYERING OF REINFORCEMENT
79 EQUATION 18.7.5.3
80 FIGURE 2-15. ELEVATION SHOWING DETAILING OF A COUPLING BEAM
81 9.4 OPTION 2: TIES AROUND ENTIRE BEAM
83 FIGURE 2-16. SECTION THROUGH COUPLING BEAM SHOWING LAYERING OF REINFORCEMENT
84 FIGURE 2-17. ELEVATION SHOWING DETAILING OF A COUPLING BEAM
86 DESIGN EXAMPLE 3 REINFORCED CONCRETE SPECIAL MOMENT FRAME
90 1. SITE GROUND MOTION
EQUATION 11.4-1
EQUATION 11.4-2
EQUATION 11.4-3
EQUATION 11.4-4
91 2. DESIGN BASE SHEAR COEFFICIENT
EQUATION 12.8-7
EQUATION 12.8-8
EQUATION 12.8-1
EQUATION 12.8-2
EQUATION 12.8-3
92 EQUATION 12.8-4
EQUATION 12.8-5
EQUATION 12.8-6
FIGURE 3-3A. DESGIN RESPONSE SPECTRA SHAPE PER ASCE 7-16 SECTION 11.4.6
93 FIGURE 3-3B. TYPICAL RESPONSE SPECTRUM
3. REDUNDANCY FACTOR
4. COMBINED EFFECT OF HORIZONTAL AND VERTICAL EARTHQUAKE-INDUCED FORCES
EQUATION 12.4-1
EQUATION 12.4-2
EQUATION 12.4-3
EQUATION 12.4-4
94 5. VERTICAL DISTRIBUTION OF SEISMIC FORCES
5.1 STORY MASSES (WEIGHTS) ARE CALCULATED IN TABLE 3-1
TABLE 3-1. CALCULATION OF BUILDING AND STORY WEIGHTS
5.2 BASE SHEAR AND VERTICAL DISTRIBUTION OF SHEAR
EQUATION 12.8-11
EQUATION 12.8-12
EQUATION 12.8-12
95 TABLE 3-2. VERTICAL DISTRIBUTION OF SHEAR
6. FRAME NODAL AND MEMBER FORCES
TABLE 3-3. BEAM GRAVITY LOADS FOR ANALYSIS
96 TABLE 3-4. COLUMN NODAL FORCES FOR ANALYSIS
97 FIGURE 3-4. COMPUTER MODEL OF THE FRAME ON LINE A
FIGURE 3-5. COMPUTER MODEL OF THE FRAME ON LINE A WITH BEAM AND COLUMN SIZES
98 7. ANALYSIS AND EVALUATION OF FRAME DRIFTS
TABLE 3-5. ALLOWABLE STORY DEFORMATIONS AND DISPLACEMENTS
99 8. BEAM DESIGN
8.1 LOAD COMBINATIONS
100 8.2 DESIGN REQUIREMENTS FOR FRAME BEAMS
101 FIGURE 3-6. MOMENT AND SHEAR DIAGRAMS FOR BEAMS
103 8.3 BEAM SKIN REINFORCEMENT
8.4 BEAM SHEAR DESIGN
105 8.5 DESIGN OF ALL FRAME BEAMS
106 TABLE 3-6. BEAM MEMBER LONGITUDINAL REINFORCEMENT DESIGN
107 TABLE 3-6. BEAM MEMBER LONGITUDINAL REINFORCEMENT DESIGN (CONTINUED)
108 TABLE 3-6. BEAM MEMBER LONGITUDINAL REINFORCEMENT DESIGN (CONTINUED)
TABLE 3-7. BEAM MEMBER SHEAR REINFORCEMENT DESIGN
109 TABLE 3-7. BEAM MEMBER SHEAR REINFORCEMENT DESIGN (CONTINUED)
110 TABLE 3-7. BEAM MEMBER SHEAR REINFORCEMENT DESIGN (CONTINUED)
111 TABLE 3-8. FINAL BEAM DESIGNS
FIGURE 3-7. REPRESENTS A BEAM AT LEVEL 2 SHOWING DIMENSIONS AND REINFORCEMENT
112 9. COLUMN DESIGN
9.1 STRONG COLUMN CALCULATION
113 9.2 FORCES ON COLUMNS DUE TO FACTORED LOAD COMBINATIONS
9.3 DESIGN OF COLUMN FOR BENDING STRENGTH
EQUATION 22.4.2.2
114 TABLE 3-9. COLUMN LOADS FROM COMPUTER MODEL FOR LOAD COMBINATION 6
115 TABLE 3-10. COLUMN LOADS FROM COMPUTER MODEL FOR LOAD COMBINATION 7
116 TABLE 3-11. CRITICAL COLUMN LOADS FOR FRAME A
117 FIGURE 3-8. COLUMN P-M DIAGRAM FOR 30-INCH × 36-INCH INTERIOR COLUMN
FIGURE 3-9. COLUMN P-M DIAGRAM FOR 30-INCH-SQUARE CORNER COLUMN
118 TABLE 3-12. COLUMN AXIAL AND FLEXURAL DESIGN STRENGTHS
119 9.4 DESIGN OF COLUMNS FOR SHEAR STRENGTH
121 TABLE 3-13. CALCULATION OF COLUMN SHEAR FORCES, VE
122 TABLE 3-14. SPECIAL TRANSVERSE REINFORCEMENT IN COLUMNS
TABLE 3-15. SHEAR STRENGTH AT FIRST STORY
123 TABLE 3-16. FINAL COLUMN DESIGN AT FIRST LEVEL
FIGURE 3-10. 30 × 36 COLUMN
124 FIGURE 3-11. 30 × 30 COLUMN
10. JOINT SHEAR ANALYSIS
TABLE 3-17. JOINT SHEAR ANALYSIS
125 FIGURE 3-12. FRAME JOINT SHEAR ANALYSIS
11. DETAILING OF BEAMS AND COLUMNS
11.1 BEAM REINFORCEMENT
126 FIGURE 3-13. BEAM AND BEAM-COLUMN JOINT REINFORCEMENT AT EXTERIOR SPAN
FIGURE 3-14. BEAM REINFORCEMENT AT INTERIOR SPANS
127 FIGURE 3-15 INTERIOR BEAM
FIGURE 3-16. BEAM-COLUMN CORNER JOINT AT ROOF
11.2 COLUMN REINFORCEMENT
128 12. FOUNDATION CONSIDERATIONS
130 FIGURE 3-17. GRADE BEAM DETAIL
131 FIGURE 3-18. COLUMN TO FOUNDATION CONNECTION DETAIL
132 DESIGN EXAMPLE 4 REINFORCED CONCRETE PARKING GARAGE
135 1. BUILDING GEOMETRY AND LOADS
1.1 GIVEN INFORMATION
136 TABLE 4-1. SLAB-TO-SLAB COLUMN SPANS ON GRID LINE B (INCHES)
137 FIGURE 4-2. LEVEL 3.0–3.5 PLAN
FIGURE 4-3. BASE PLAN
138 FIGURE 4-4. SECTION AT GRID LINE B
1.2 MATERIAL WEIGHTS
1.3 LIVE LOADS
139 1.4 SEISMIC MASS
TABLE 4-2. SUMMATION OF SEISMIC MASS
2. LOAD COMBINATIONS FOR DESIGN
140 EQUATION 12.4-3
EQUATION 12.4-7
EQUATION 12.4-4a
3. LATERAL ANALYSIS
3.1 STRUCTURAL SYSTEM
3.2 HORIZONTAL STRUCTURAL IRREGULARITIES
142 3.3 VERTICAL STRUCTURAL IRREGULARITIES
3.4 PROHIBITED IRREGULARITIES
143 3.5 ADDITIONAL REQUIREMENTS
3.6 DIAPHRAGM CLASSIFICATION
3.7 REDUNDANCY
3.8 ANALYSIS PROCEDURE
144 3.9 STRUCTURAL MODELING
145 TABLE 4-3. ETABS SECTION PROPERTY MODIFIERS
EQUATION 12.8-7
3.10 PERIOD DETERMINATION
EQUATION 12.8-7
3.11 SEISMIC RESPONSE COEFFICIENT
EQUATION 12.8-2
146 EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
3.12 SEISMIC BASE SHEAR
EQUATION 12.8-1
3.13 VERTICAL DISTRIBUTION OF SEISMIC FORCES
EQUATION 12.8-11
EQUATION 12.8-12
147 TABLE 4-4. SEISMIC FORCE DISTRIBUTION
4. SLAB, BEAM, AND COLUMN DESIGN
148 FIGURE 4-5. MEMBERS SELECTED FOR GRAVITY DESIGN
149 4.1 POST-TENSIONED SLAB
FIGURE 4-6 P/T SLAB REINFORCEMENT
4.2 POST-TENSIONED BEAMS
150 TABLE 4-5. BEAM FORCES (UNITS OF KIPS AND KIP-FT)
151 FIGURE 4-7. BEAM AND COLUMN MOMENT DIAGRAMS: (a) LINE 2; (b) LINE 3; (c) LINE 4; (d) LINE 5
FIGURE 4-8. P/T BEAM REINFORCEMENT
152 4.3 COLUMNS
153 TABLE 4-6. COLUMN FORCES (UNITS OF KIPS AND KIP-FT)
154 FIGURE 4-9. COLUMN INTERACTION DIAGRAMS
155 FIGURE 4-10. COLUMN REINFORCEMENT
TABLE 4-7. PROBABLE MOMENT CAPACITY FOR COLUMNS ON GRID LINES 2 AND 5
156 5. WALL AND RAMP FORCES
TABLE 4-8. MAXIMUM SEISMIC SHEAR FORCES IN WALL ELEMENTS (KIPS)
TABLE 4-9. MAXIMUM SEISMIC AXIAL AND SHEAR FORCES IN RAMP ELEMENTS (KIPS)
157 6. PROVISIONS FOR SECONDARY FRAME MEMBERS
158 TABLE 4-10. PROVISIONS FOR SECONDARY FRAME MEMBERS PER §18.14.
159 FIGURE 4-11. SECTION 18.14 DESIGN PROCEDURE FOR BEAMS AND COLUMNS
6.1 DESIGN AND DETAILING OF SECONDARY BEAMS
162 EQUATION 22.5.8.5.3
163 6.2 DESIGN AND DETAILING OF SECONDARY COLUMNS
164 TABLE 4-11. MAXIMUM COLUMN FORCES AT DESIGN DISPLACEMENT (UNITS OF KIPS AND K-FT)
165 FIGURE 4-12. COLUMN INTERACTION DIAGRAMS WITH SEISMIC FORCES DETERMINED AT DESIGN DISPLACEMENT
167 TABLE 4-12. DESIGN STEP 3: COLUMN AXIAL STRESS FOR LOAD COMBINATIONS 6 AND 7
TABLE 4-13. COLUMN DETAILING AND SHEAR STRENGTH REQUIREMENTS
168 TABLE 4-14. COLUMN LONGITUDINAL REINFORCEMENT PER ACI 318 SECTION 18.7.4.1
170 TABLE 4-15. DESIGN REFERENCE FOR COLUMN SHEAR REINFORCEMENT
171 FIGURE 4-13. BEAM AND COLUMN SHEAR REINFORCEMENT
176 TABLE 4-16. COLUMN SEISMIC DESIGN SHEAR, VE—NORTH-SOUTH DIRECTION
TABLE 4-17. COLUMN SEISMIC DESIGN SHEAR, VE—EAST-WEST DIRECTION
177 TABLE 4-18. COLUMN SHEAR REINFORCEMENT DESIGN
FIGURE 4-14. FREE-BODY DIAGRAM AT BEAM-COLUMN JOINTS
178 FIGURE 4-15. BEAM-COLUMN JOINTS AT LEVEL 1.5
FIGURE 4-16. SLAB-COLUMN JOINTS AT LEVEL 1.5
179 FIGURE 4-17. FEM MODEL FOR FULL-HEIGHT COLUMN METHOD
180 TABLE 4-19. COLUMN DESIGN SHEAR: FULL-HEIGHT COLUMN METHOD
TABLE 4-20. COLUMN DESIGN SHEAR: SIMPLIFIED PUSHOVER METHOD
182 6.3 BEAM-COLUMN JOINTS
184 7. DIAPHRAGM ANALYSIS
EQUATION 12.10-1
EQUATION 12.10-2
EQUATION 12.10-3
TABLE 4-21. DIAPHRAGM INERTIAL FORCES
185 TABLE 4-22. SEISMIC SHEAR FORCES AT SLAB-WALL INTERFACES (KIPS)
TABLE 4-23. MAXIMUM SEISMIC FORCES AT THE RAMPS (KIPS AND KIP-FT)
8. DIAPHRAGM DESIGN
8.1 SHEAR DESIGN
186 EQUATION 18.12.9.1
8.2 CHORD AND COLLECTOR REINFORCEMENT
187 8.3 DIAPHRAGM CHORD DESIGN
188 9. COLLECTOR DESIGN
9.1 DIAPHRAGM STRENGTHENING AT GRID LINE 9
189 FIGURE 4-18. SLAB STRESS CONTOURS AT LEVEL 2.0
9.2 SHEAR TRANSFER DESIGN AT GRID LINE 9
EQUATION 22.9.4.2
190 EQUATION 25.4.2.3(a)
191 FIGURE 4-19. PARTIAL PLAN AT LINE 9
192 9.3 SLAB COLLECTOR DESIGN AT GRID LINE A
194 FIGURE 4-20. COLLECTOR DIAGRAM, LINE A
195 FIGURE 4-21. FREE-BODY DIAGRAM, GRID LINE A
9.4 SHEAR TRANSFER DESIGN AT GRID LINE A
196 FIGURE 4-22. PARTIAL PLAN, GRID LINE
FIGURE 4-23. SHEAR TRANSFER AT SLAB-WALL INTERFACES
197 SUMMARY
198 DESIGN EXAMPLE 5 PILE FOUNDATION
1. BUILDING GEOMETRY AND LOADS
1.1 GIVEN INFORMATION
199 FIGURE 5-1. FOUNDATION PLAN
1.2 DESIGN VERTICAL LOADS
200 TABLE 5-1. LOADING AT VARIOUS SUPPORT CONDITIONS
1.3 GEOTECHNICAL RECOMMENDATIONS
FIGURE 5-2. GEOTECHNICAL PILE CAPACITY VS. DEPTH, FROM GEOTECHNICAL REPORT
201 2. LOAD COMBINATIONS FOR DESIGN
2.1 COMBINATIONS FOR GEOTECHNCAL DESIGN
EQUATION 16-1
EQUATION 16-5
EQUATION 16-6
2.2 COMBINATIONS FOR STRUCTURAL DESIGN
EQUATION 1
EQUATION 2
EQUATION 6
EQUATION 7
3. DETERMINATION OF OPTIMAL PILE CAPACITY AND LENGTH
3.1 NUMBER OF PILES PER LOCATION—GEOTECHNICAL DESIGN
202 TABLE 5-2. LOAD COMBINATIONS FOR GEOTECHNICAL DESIGN
203 FIGURE 5-3. GEOTECHNICAL PILE CAPACITY VS. DEPTH, WITH SELECTED DEPTH AND CAPACITY
TABLE 5-3. NUMBER OF PILES REQUIRED FOR EACH CONDITION
204 4. PRELIMINARY PILE VERTICAL REINFORCEMENT
4.1 MINIMUM REINFORCEMENT
4.2 LIMITING LOADS
5. BUILDING BASE SHEAR RESISTANCE
5.1 DISTRIBUTION THROUGH GROUND LEVEL SLAB
205 5.2 PASSIVE PRESSURE ON CAPS
5.3 PILE GROUP EFFICIENCY
TABLE 5-4. COMPUTED P-MODIFICATION FACTORS FOR GROUPS OF VARIOUS NUMBERS OF PILES IN STANDARD FORMATIONS, WITH THREE-DIAMETER SPACING, ACCORDING TO FORMULAE PRESENTED IN REESE, ET AL. (2006)
6. LATERAL-LOADING ANALYSIS
6.1 PILE LATERAL STIFFNESS
206 TABLE 5-5. COMPUTED FACTORED AXIAL LOADS PER PILE FOR VARIOUS SUPPORT TYPES
6.2 CONSISTENT LATERAL DEFORMATIONS
TABLE 5-6. AXIAL LOAD, MOMENT, AND SHEAR FOR SELECTED DESIGN POINTS
207 6.3 RESISTANCE OF TOTAL BASE SHEAR
TABLE 5-7. LATERAL RESISTANCE DUE TO PASSIVE PRESSURE AND PILE BENDING
208 7. CHECK OF AXIAL-MOMENT INTERACTION
7.1 ACI 318 REQUIREMENTS
EQUATION 22.4.2.2
7.2 CONTROLLING DESIGN POINTS
FIGURE 5-4. AXIAL-MOMENT INTERACTION WITH AXIAL LOAD LIMITED PER ACI 318
209 8. DESIGN OF TRANSVERSE REINFORCING
8.1 IBC DETAILING REQUIREMENTS
TABLE 5-8. TRANSVERSE REINFORCING REQUIREMENTS
8.2 CHECK PILE MOMENT VS. DEPTH FOR REINFORCED LENGTH
EQUATION 18-5
210 FIGURE 5-5. MOMENT VS. DEPTH FROM LPILE, WITH CRACKING MOMENT SHOWN
211 8.3 CHECK PILE SHEAR CAPACITY
EQUATION 25.1.1
9. DEVELOPMENT OF VERTICAL BARS INTO CAP
9.1 DEVELOPMENT OF STRAIGHT BARS
EQUATION 25.4.2.4a
FIGURE 5-6. CENTER-TO-CENTER SPACING OF SIX BARS IN A 16-INCH PILE WITH 3 INCHES OF CLEAR COVER
EQUATION 25.4.2.4a
212 9.2 DEVELOPMENT OF HEADED BARS
9.3 EMBEDMENT OF PILES INTO CAP
9.4 DESIGN OF GRADE BEAMS
9.5 SUMMARY OF DESIGN
FIGURE 5-7. GRADE BEAM DETAIL SHOWING CONNECTION TO SLAB-ON-GRADE
213 FIGURE 5-8. PILE DETAIL SHOWING DIMENSIONS AND REINFORCING
214 10. REFERENCES
216 DESIGN EXAMPLE 6 PILE FOUNDATION FOR SMRF
1. GIVEN INFORMATION
1.1 PROJECT SEISMIC DATA
217 1.2 FRAME LOADING AND GEOMETRY
FIGURE 6-1. FRAME ELEVATION
218 FIGURE 6-2. LOWEST LEVEL FRAME COLUMN DETAIL
2. CASE I: MOMENTS RESISTED BY CONTINUOUS STIFF GRADE BEAM
2.1 MODELING
2.2 LOADING
219 FIGURE 6-3. PROBABLE STRENGTH COLUMN INTERACTION DIAGRAM
220 FIGURE 6-4. GRADE BEAM MOMENT AND SHEAR DIAGRAMS FOR DESIGN
221 2.3 PILE DESIGN
2.4 LONGITUDINAL GRADE BEAM DESIGN
FIGURE 6-5. GRADE BEAM SECTION
222 EQUATION 22.5.5.1
2.5 TRANSVERSE GRADE BEAM DESIGN
223 FIGURE 6-6. GRADE BEAM TRANSVERSE SECTION SHOWING STRUT-AND-TIE GEOMETRY
EQUATION 23.9.2
224 EQUATION 23.4.3
225 FIGURE 6-7 GRADE BEAM TRANSVERSE SECTION SHOWING VERTICAL BAR EXTENSIONS
3. CASE II: MOMENTS RESISTED BY GRADE BEAM AND PILE FLEXURE
3.1 MODELING
FIGURE 6-8. PARTIAL FRAME ELEVATION
226 3.2 LOADING
TABLE 6-1. ROTATIONAL STIFFNESS AT 500 KIP-INCHES
227 FIGURE 6-9. GRADE BEAM MOMENT AND SHEAR DIAGRAMS FOR DESIGN
3.3 PILE DESIGN
228 FIGURE 6-10. PILE AXIAL-MOMENT INTERACTION DIAGRAM FOR PILES FROM DESIGN EXAMPLE 5 WITH UPDATED AXIAL LOADS
229 FIGURE 6-11. PILE AXIAL-MOMENT INTERACTION DIAGRAM FOR PILES WITH HEAVIER REINFORCING
3.4 GRADE BEAM DESIGN
230 FIGURE 6-12. GRADE BEAM SECTION
231 4. CASE III: MOMENTS RESISTED BY PILE AXIAL LOADS
4.1 MODELING
FIGURE 6-13. PARTIAL FRAME ELEVATION
TABLE 6-2. INDIVIDUAL PILE LOADS
232 FIGURE 6-14. SEISMIC REACTIONS
234 FIGURE 6-15. TRANSVERSE SECTION OF CAP
236 DESIGN EXAMPLE 7 DESIGN OF CONCRETE DIAPHRAGM AND COLLECTOR
237 1. BUILDING GEOMETRY AND LOADS
1.1 GIVEN INFORMATION
FIGURE 7-1. TYPICAL FLOOR FRAMING PLAN
238 FIGURE 7-2. PENTHOUSE FRAMING PLAN
FIGURE 7-3. BUILDING ELEVATION AT GRID LINE A
239 FIGURE 7-4. BUILDING ELEVATION AT GRID LINE D
FIGURE 7-5. BUILDING ELEVATION AT GRID LINE 1
240 FIGURE 7-6. BUILDING 3D VIEW
241 1.2 ASSEMBLY WEIGHTS
242 1.3 FLOOR AND ROOF WEIGHTS
2. DETERMINATION OF DIAPHRAGM DEMANDS
2.1 DESIGN SPECTRAL ACCELERATIONS
243 EQUATION 11.4-1
EQUATION 11.4-2
EQUATION 11.4-3
EQUATION 11.4-4
2.2 SEISMIC DESIGN CATEGORY
2.3 LOAD COMBINATIONS
EQUATION 12.4-1
EQUATION 12.4-2
EQUATION 12.4-3
EQUATION 12.4-4
EQUATION 12.4-5
EQUATION 12.4-6
EQUATION 12.4-7
244 2.4 DESIGN BASE SHEAR
EQUATION 12.8-7
EQUATION 12.8-1
EQUATION 12.8-2
245 EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
2.5 VERTICAL DISTRIBUTION OF FORCES
EQUATION 12.8-11
EQUATION 12.8-12
246 TABLE 7-1. DETERMINATION OF FX
2.6 DIAPHRAGM DESIGN FORCES
EQUATION 12.10-1
TABLE 7-2. DETERMINATION OF FPX
247 2.7 DIAPHRAGM DESIGN FORCES ALTERNATIVE METHOD
EQUATION 12.10-4
EQUATION 12.10-6
EQUATION 12.10-8
EQUATION 12.10-9
EQUATION 12.10-13
248 EQUATION 12.10-5
3. DETERMINATION OF DIAPHRAGM SHEARS AND CHORD FORCES FOR BUILDING WITH LARGE OPENING
249 FIGURE 7-7. CUMULATIVE STORY SHEAR WALL FORCES BY LEVEL—WALL ON GRID LINE A
FIGURE 7-8. CUMULATIVE STORY SHEAR WALL FORCES BY LEVEL—WALL ON GRID LINE D
250 FIGURE 7-9. PLAN VIEW OF THIRD-FLOOR DIAPHRAGM LOADING
3.1 DETERMINATION OF DIAPHRAGM SHEARS
FIGURE 7-10. BEAM MODEL OF DIAPHRAGM IN THE EAST-WEST DIRECTION
251 FIGURE 7-11. SHEAR DIAGRAM OF THE DIAPHRAGM IN THE EAST-WEST DIRECTION
EQUATION 12.5.3.3
252 3.2 DETERMINATION OF CHORD FORCES
FIGURE 7-12. MOMENT DIAGRAM OF THE DIAPHRAGM IN THE EAST-WEST DIRECTION
253 FIGURE 7-13. PLAN VIEW OF THE THIRD-FLOOR DIAPHRAGM LOAD DISTRIBUTION AROUND THE OPENING
254 FIGURE 7-14. FREE-BODY DIAGRAM OF THIRD-FLOOR DIAPHRAGM SEGMENT ADJACENT TO OPENING
255 4. DESIGN OF DIAPHRAGM REINFORCEMENT FOR DIAPHRAGM WITH LARGE OPENINGS
256 FIGURE 7-15. CHORD REINFORCEMENT DETAIL AT OPENING
257 FIGURE 7-16. CHORD REINFORCEMENT PLAN FOR SEISMIC FORCE IN EAST-WEST DIRECTION
5. COLLECTOR DESIGN
5.1 COLLECTOR FORCE
258 FIGURE 7-17. COLLECTOR FORCE DIAGRAM
259 5.2 DESIGN LOAD COMBINATION
5.3 COLLECTOR BEAM DESIGN
260 FIGURE 7-18 COLLECTOR BEAM P-M DIAGRAM
FIGURE 7-18. COLLECTOR BEAM P-M DIAGRAM
261 FIGURE 7-19. COLLECTOR BEAM AND DIAPHRAGM CHORD REINFORCEMENT DETAIL
262 6. COMPARISON OF DIAPHRAGM FORCE AND CHORD FORCE USING RIGID DIAPHRAGM ASSUMPTION AND HAND CALCULATIONS VS. COMPUTER MODEL ANALYSIS WITH SEMIRIGID DIAPHRAGM ASSUMPTION
6.1 CASE STUDIES
FIGURE 7-20. CASE 1: RESULTANT F22 FORCE DIAGRAM ON THE DIAPHRAGM
263 FIGURE 7-21. CASE 1: SECTION-CUT FORCES ON THE DIAPHRAGM
264 FIGURE 7-22. BEAM MODEL OF DIAPHRAGM IN THE EAST-WEST DIRECTION
265 6.2 CASE STUDY—DIAPHRAGM WITH OPENINGS
FIGURE 7-23. CASE 3: F22 FORCE DIAGRAM ON THE DIAPHRAGM
267 6.3 CALCULATION OF DIAPHRAGM DEMANDS
270 DESIGN EXAMPLE 8 REINFORCED CONCRETE DUCTILE COUPLED WALLS
271 1. BUILDING GEOMETRY AND LOADS
FIGURE 8-1. SHEAR WALL ELEVATION
272 FIGURE 8-2. TYPICAL FLOOR PLAN
1.1 GIVEN INFORMATION
273 1.2 DESIGN LOADS AND LATERAL FORCES
TABLE 8-1. PIER FORCES
1.3 MODELING ASSUMPTIONS
1.3.1 CAPTURING P-DELTA BEHAVIOR IN ANALYSIS
1.3.2 EFFECTIVE STIFFNESS OF A COUPLING BEAM
275 FIGURE 8-3. COMPARISON OF PIER 1 FORCES
276 FIGURE 8-4. COMPARISON OF THIRD-STORY SPANDREL FORCES
277 1.3.5 AXIAL FORCE DUE TO SEISMIC LOADS IN WALL PIERS
1.4 OVERVIEW OF REQUIREMENTS FOR DUCTILE COUPLED WALLS IN ACI 318AND ASCE 7
1.5 USE OF HIGH STRENGTH REINFORCEMENT IN SEISMIC APPLICATIONS
278 TABLE 8-2. TRANSVERSE REINFORCEMENT REQUIREMENT FOR A706 GR. 80
2. LOAD COMBINATIONS FOR DESIGN
3. PRELIMINARY SIZING OF WALL
EQUATION 18.10.3.1
279 4. COUPLING BEAM STRENGTH AND DIAGONAL REINFORCEMENT
4.1 DIAGONAL COUPLING BEAMS VERSUS CONVENTIONAL COUPLING BEAMS
4.2 DESIGN OF CONVENTIONAL REINFORCEMENT
281 4.3 DESIGN FOR DIAGONAL COUPLING BEAMS
5. DETAILING OF COUPLING BEAMS
5.1 DETAILING OF CONVENTION COUPLING BEAM
282 FIGURE 8-5. CONVENTIONAL COUPLING BEAM ELEVATION
FIGURE 8-6. CONVENTIONAL COUPLING BEAM SECTION
283 5.2 DETAILING OF DIAGONAL COUPLING BEAM
284 5.3 DETAILING OF DIAGONAL COUPLING BEAM
EQUATION 25.4.2.4a
285 FIGURE 8-7. DIAGONAL COUPLING BEAM ELEVATION
FIGURE 8-8. DIAGONAL COUPLING BEAM SECTION
286 6. FLEXURAL REINFORCEMENT OF WALL PIERS
6.1 DESIGN OF VERTICAL REINFORCEMENT
TABLE 8-3. PIERS 1 AND 2 REINFORCEMENT SUMMARY
FIGURE 8-9. PIER REINFORCEMENT
287 TABLE 8-4. DESIGN FORCES FOR PIER 1
FIGURE 8-10. P-M INTERACTION FOR PIER 1
288 TABLE 8-5. DESIGN FORCES FOR PIER 2
FIGURE 8-11. P-M INTERACTION FOR PIER 2
289 TABLE 8-6. DESIGN FORCES FOR PIER 3
290 FIGURE 8-12. P-M INTERACTION FOR PIER 3
7. SHEAR REINFORCEMENT OF WALL PIERS
7.1 ACI 318 REQUIREMENTS
291 7.2 SHEAR FRICTION AT HORIZONTAL WALL CONSTRUCTION JOINTS
292 8. DETAILING OF WALL-PIER BOUNDARY ELEMENTS
8.1 REQUIREMENT FOR SPECIAL BOUNDARY ELEMENTS
293 8.2 DETAILING OF SPECIAL BOUNDARY ELEMENTS
294 FIGURE 8-13. PIER 2 SBE DETAIL
9. DESIGN AND DETAILING CONSIDERATIONS
9.1 COUPLING BEAMS CONGESTION CONSIDERATIONS
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