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eLibrary > 2018 IBC SEAOC Structural/Seismic Design Manual Volume 4: Examples for Steel-Framed Buildings >

2018 IBC SEAOC Structural/Seismic Design Manual Volume 4: Examples for Steel-Framed Buildings, 2018

MADCAD.com contains information which is proprietary to and copyrighted by International Code Council, Inc. The acronym 'ICC' and the ICC logo are trademarks and service marks of ICC. ALL RIGHTS RESERVED.

2018 IBC SEAOC Structural/Seismic Design Manual Volume 4: Examples for Steel-Framed Buildings, 2018

2018 IBC® SEAOC STRUCTURAL /SEISMIC DESIGN MANUAL-VOLUME 4 EXAMPLES FOR STEEL-FRAMED BUILDINGS
2018 IBC® SEAOC STRUCTURAL /SEISMIC DESIGN MANUAL-VOLUME 4 EXAMPLES FOR STEEL-FRAMED BUILDINGS TITLE PAGE
COPYRIGHT
PUBLISHER
EDITOR
DISCLAIMER
SUGGESTIONS FOR IMPROVEMENT
ERRATA NOTIFICATION
TABLE OF CONTENTS
PREFACE TO THE 2018 IBC SEAOC STRUCTURAL/SEISMIC DESIGN MANUAL
PREFACE TO VOLUME 4
ACKNOWLEDGEMENTS
REFERENCES
HOW TO USE THIS DOCUMENT
DESIGN EXAMPLE 1 SPECIAL MOMENT FRAME [Go to Page]
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION [Go to Page]
FIGURE 1-1 TYPICAL FLOOR FRAMING PLAN
FIGURE 1-2 FRAME ELEVATION-LINE 1 (LINE 2 IN BACKGROUND)
1.2 FLOOR WEIGHTS [Go to Page]
TABLE 1-1 DEVELOPMENT OF SEISMIC FORCES PER APPENDIX A
2. CALCULATION OF THE DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM AND DETERMINE SPECTRAL ACCELERATIONS
2.2 DESIGN SPECTRAL ACCELERATIONS
2.3 DESIGN RESPONSE SPECTRUM [Go to Page]
EQUATION 12.8-7
EQUATION 11.4-5
EQUATION 11.4-6
FIGURE 1-3 DESIGN RESPONSE SPECTRUM FOR THE EXAMPLE BUILDING
2.4 HORIZONTAL IRREGULARITIES [Go to Page]
TABLE 1-2 STORY DISPLACEMENTS, LINE 1 AND LINE 5, TORSIONAL IRREGULARITY CHECK
2.5 VERTICAL IRREGULARITIES
2.6 LATERAL FORCE PROCEDURE
2.7 BASE SHEAR [Go to Page]
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
EQUATION 12.8-1
2.8 REDUNDANCY FACTOR [Go to Page]
TABLE 1-3 STORY DISPLACEMENTS, LINES 1, 5, A, AND F, EXTREME TORSIONAL IRREGULARITY CHECK (ILLUSTRATIVE)
2.9 LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF SHEAR [Go to Page]
TABLE 1-4 VERTICAL DISTRIBUTION OF SHEAR
EQUATION 12.8-11
EQUATION 12.8-12
3.2 HORIZONTAL DISTRIBUTION OF STORY SHEAR [Go to Page]
FIGURE 1-4 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE STORY SHEAR TO SMFS
TABLE 1-5 CENTER-OF-RIGIDITY CALCULATION
TABLE 1-6 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE SHEAR TO SMFs (X-DIRECTION)
TABLE 1-7 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE SHEAR TO SMFs (Y-DIRECTION)
TABLE 1-8 STORY FORCES APPLIED TO SMF ALONG LINE F
4. SMF FRAME [Go to Page]
4.1 SMF LAYOUT
4.2 DEFLECTION LIMITS [Go to Page]
EQUATION 12.8-15
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-1
EQUATION 12.8-3
EQUATION 12.8-1
4.3 STABILITY COEFFICIENT [Go to Page]
EQUATION 12.8-16
EQUATION 12.8-17
TABLE 1-9 INTERSTORY DISPLACEMENTS AND DRIFTS
5. ELEMENT AND RBS CONNECTION DESIGN [Go to Page]
5.1 ELEMENT SIZING
5.2 MATERIAL SPECIFICATIONS AND STRENGTH PROPERTIES
5.3 DESIGN TYPICAL BEAM [Go to Page]
FIGURE 1-5 TYPICAL BEAM AT FIFTH FLOOR OF FRAME 1-CD
ASCE 7, §2.3.6 EQUATION 6
EQUATION 12.4-1
EQUATION 12.4-3
EQUATION 12.4-4
AISC 360, EQUATION A-6-7
AISC 360, EQUATION A-6-8
AISC 360, EQUATION F2-5
AISC 360, EQUATION G2-1
AISC 360, EQUATION G2-3
5.4 DESIGN TYPICAL COLUMN [Go to Page]
FIGURE 1-6 TYPICAL SECOND-STORY COLUMN AT FRAME 1
EQUATION 12.4-1
EQUATION 12.4-3
EQUATION 12.4-4
AISC 360, EQUATION H1-1B
AISC 360, EQUATION G2-1
AISC 360, EQUATION G2-2
5.5 RBS CONNECTION LIMITATIONS
5.6 RBS CONNECTION DESIGN [Go to Page]
EQUATION 5.8-1
EQUATION 5.8-2
EQUATION 5.8-3
FIGURE 1-7 RBS GEOMETRY
FIGURE 1-8 PLASTIC-HINGE LOCATIONS
AISC 358, EQUATION 5.8-4
AISC 358, EQUATIONS 2.4-1, 5.8-5
AISC 358, EQUATION 2.4-2
FIGURE 1-9 BEAM EQUILIBRIUM UNDER THE PROBABLE PLASTIC MOMENT MPR
AISC 358, EQUATION 5.8-6
FIGURE 1-10 FREE-BODY DIAGRAM BETWEEN CENTER OF RBS AND FACE OF COLUMN
AISC 358, EQUATION 5.8-7
AISC 358, EQUATION 5.8-8
AISC 358, EQUATION 5.8-9
AISC 341, EQUATION E3-8
AISC 360, EQUATION J10-2
AISC 360, EQUATION J10-4
AISC 360, EQUATION J4-1
FIGURE 1-11 PANEL ZONE FORCES
FIGURE 1-12 COLUMN SHEAR
AISC 360, EQUATION J10-11
AISC 341, EQUATION E3-7
FIGURE 1-13 BEAM-COLUMN DIMENSIONS
FIGURE 1-14 DEMANDS FROM BEAM
FIGURE 1-15 FREE-BODY DIAGRAM
FIGURE 1-16 FREE-BODY DIAGRAM
FIGURE 1-17 DEVELOPMENT OF MPC
6. DETAILING OF RBS CONNECTION [Go to Page]
FIGURE 1-18 RBS CONNECTION
FIGURE 1-19 RBS CONNECTION
FIGURE 1-20 RBS CONNECTION
FIGURE 1-21 RBS CONNECTION
FIGURE 1-22 CONTINUITY PLATE
DESIGN EXAMPLE 2 SPECIAL CONCENTRICALLY BRACED FRAME [Go to Page]
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION
1.2 FRAME LAYOUT [Go to Page]
1.2.1 LOCATION OF FRAMES [Go to Page]
FIGURE 2-1 PLAN
1.2.2 CONFIGURATION OF FRAMES [Go to Page]
FIGURE 2-2 FRAME 1 ELEVATION
1.2.3 RELATIONSHIP OF BRACES TO THE ARCHITECTURE [Go to Page]
FIGURE 2-3 TYPICAL GUSSET CONFIGURATION
2. DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM
2.2 DESIGN RESPONSE SPECTRUM
2.3 HORIZONTAL IRREGULARITIES
2.4 VERTICAL IRREGULARITIES
2.5 LATERAL FORCE PROCEDURE
2.6 BASE SHEAR [Go to Page]
EQUATON 12.8-7
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
EQUATION 12.8-1
2.7 REDUNDANCY FACTOR
2.8 LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF SHEAR [Go to Page]
TABLE 2-1 VERTICAL DISTRIBUTION OF SHEAR
EQUATION 12.8-11
EQUATION 12.8-12
3.2 HORIZONTAL DISTRIBUTION OF STORY SHEAR [Go to Page]
TABLE 2-2 VERTICAL DISTRIBUTION OF SHEAR
4. BRACE SIZING [Go to Page]
4.1 REQUIRED STRENGTH [Go to Page]
TABLE 2-3 BRACE DESIGN FORCES FOR FRAME A
TABLE 2-4 BRACE DESIGN FORCES FOR FRAME 1
4.2 SECTION SELECTION [Go to Page]
TABLE 2-5 BRACE DESIGNS FOR FRAME A
TABLE 2-6 BRACE DESIGNS FOR FRAME 1
5. PLASTIC MECHANISM ANALYSIS [Go to Page]
TABLE 2-7 BRACE CAPACITY FORCES
5.1 CONDITION 1: MAXIMUM TENSION FORCE AND MAXIMUM COMPRESSION FORCE [Go to Page]
FIGURE 2-4 MAXIMUM-FORCE CONDITION FOR FRAME 1
5.2. CONDITION 2: MAXIMUM TENSION FORCE AND POST-BUCKLING COMPRESSION FORCE [Go to Page]
FIGURE 2-5 POST-BUCKLED CONDITIONED FOR FRAME 1
6. BEAM SEISMIC FORCES [Go to Page]
6.1 INTERSECTED BEAM (SIXTH FLOOR, Frame 1) [Go to Page]
FIGURE 2-6 FREE-BODY DIAGRAM OF THE SIXTH-FLOOR BEAM
6.1.1 CONDITION 1
6.1.2 CONDITION 2
6.2 REDISTRIBUTION BEAM (THIRD FLOOR, Frame 1) [Go to Page]
FIGURE 2-7 FREE-BODY DIAGRAM OF THE THIRD-FLOOR BEAM
FIGURE 2-8 FREE-BODY DIAGRAM OF THE RIGHT-HAND CONNECTION OF THE THIRD-FLOOR BEAM
6.3 FIFTH-FLOOR BEAM (Frame 1) [Go to Page]
FIGURE 2-9 FREE-BODY DIAGRAM OF FIFTH-FLOOR BEAMS
6.3.1 CONDITION 1
6.3.2 CONDITION 2
7. COLUMN SEISMIC FORCES [Go to Page]
7.1 CONDITION 1 [Go to Page]
TABLE 2-8 COLUMN SEISMIC FORCES FOR CONDITION 1 (FRAME 1)
7.2 CONDITION 2 [Go to Page]
TABLE 2-9 COLUMN SEISMIC FORCES FOR CONDITION 2
7.3 OVERSTRENGTH FACTOR [Go to Page]
TABLE 2-10 COLUMN SEISMIC FORCES CONSIDERING THE OVERSTRENGTH FACTOR
7.4 DESIGN SEISMIC FORCES [Go to Page]
TABLE 2-11 COLUMN SEISMIC FORCES USED FOR DESIGN
TABLE 2-12 COLUMN DESIGN FORCES AND SIZES
8. DETAILING AND DESIGN OF CONNECTIONS [Go to Page]
FIGURE 2-10 CONNECTION DETAIL
8.1 CONDITION 1: BRACE YIELDING [Go to Page]
8.1.1 SELECT KNIFE PLATE
8.1.2 BRACE TO KNIFE-PLATE WELD
8.1.3 KNIFE PLATE TO GUSSET WELD
8.1.4 BRACE CHECKS
8.1.5 GUSSET THICKNESS, WIDTH, AND DIMENSIONS
8.1.6 GUSSET ANALYSIS
8.1.7 GUSSET TO BEAM AND COLUMN WELDS
8.1.8 BEAM WEB YIELDING
8.1.9 COLUMN WEB YIELDING
8.2 CONDITION 2: BRACE BUCKLING (MAXIMUM COMPRESSION FORCE) [Go to Page]
8.2.1 BEAM WEB CRIPPLING
8.2.2 COLUMN WEB CRIPPLING
8.3 CONDITION 3: BRACE BUCKLING (ROTATIONAL DEMANDS)
8.4 ACCOMMODATION OF FRAME DRIFT [Go to Page]
FIGURE 2-11 COMPLETED CONNECTION DETAIL
FIGURE 2-12 CONNECTION DETAIL
9. ADDITIONAL CONSIDERATIONS [Go to Page]
9.1. BRACE TRANSVERSE DISPLACEMENT
9.2 PROTECTED ZONES
9.3 DEMAND-CRITICAL WELDS
9.4 QUALITY ASSURANCE
10. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 3 BUCKLING-RESTRAINED BRACED FRAME [Go to Page]
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION [Go to Page]
FIGURE 3-1 TYPICAL FLOOR AND ROOF FRAMING PLAN
FIGURE 3-2 BRACED-FRAME ELEVATIONS
TABLE 3-1 FLOOR WEIGHTS PER APPENDIX A
2. CALCULATION OF THE DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM AND DETERMINE SPECTRAL ACCELERATIONS
2.2 DESIGN SPECTRAL ACCELERATIONS
2.3 DESIGN RESPONSE SPECTRUM [Go to Page]
EQUATION 12.8-7
EQUATION 11.4-5
EQUATION 11.4-6
FIGURE 3-3 DESIGN RESPONSE SPECTRUM FOR THE EXAMPLE BUILDING
2.4 HORIZONTAL IRREGULARITIES [Go to Page]
TABLE 3-2 STORY DISPLACEMENTS, LINE 1 AND LINE 5 TORSIONAL IRREGULARITY CHECK
2.5 VERTICAL IRREGULARITIES
2.6 LATERAL FORCE PROCEDURE
2.7 BASE SHEAR [Go to Page]
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
EQUATION 12.8-1
2.8 REDUNDANCY FACTOR [Go to Page]
TABLE 3-3 STORY DISPLACEMENTS, LINES 1, 5, A, AND F, EXTREME TORSIONAL IRREGULARITY CHECK
2.9 LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF SHEAR [Go to Page]
TABLE 3-4 VERTICAL DISTRIBUTION OF SHEAR
EQUATION 12.8-11
EQUATION 12.8-12
3.2 HORIZONTAL DISTRIBUTION OF STORY SHEAR [Go to Page]
FIGURE 3-4 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE STORY SHEAR TO BRBFS
TABLE 3-5 CENTER OF RIGIDITY CALCULATION
TABLE 3-6 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE SHEAR TO BRBFS (X-DIRECTION)
TABLE 3-7 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE SHEAR TO BRBFS (Y-DIRECTION)
TABLE 3-8 STORY FORCES APPLIED TO BRBF ALONG LINE 4
4. PRELIMINARY SIZING [Go to Page]
4.1 BRB LAYOUT
4.2 BRB CONFIGURATION
4.3 REQUIRED BRACE AREA [Go to Page]
EQUATION F4-1
TABLE 3-9 BRB CORE AREA ALONG LINE 4
4.4 A NOTE ABOUT MATERIAL PROPERTIES
4.5 COMPUTATION OF ADJUSTED BRACE STRENGTH
4.6 BEAM DESIGN
4.7 CHECK WIDTH-THICKNESS RATIO
4.8 FIND MOMENT IN BEAM
4.9 CHECK BEAM FOR COMBINED AXIAL AND FLEXURE DUE TO COLLECTOR ACTION [Go to Page]
FIGURE 3-5 COLLECTOR FORCE DIAGRAM ALONG LINE 4 AT SECOND FLOOR
4.10 SUMMARY OF BEAM DESIGN
4.11 COLUMN DESIGN [Go to Page]
TABLE 3-10 SUMMARY OF BRACE CORE STRAIN CALCULATION
4.12 CHECK WIDTH-THICKNESS RATIO
4.13 FIND MOMENT IN COLUMN
4.14 CHECK COLUMN FOR COMBINED AXIAL AND MOMENT
4.15 SUMMARY OF COLUMN DESIGN [Go to Page]
TABLE 3-11 SUMMARY OF COLUMN CHECK
5. PRELIMINARY ANALYSIS AND BRACE DEFORMATIONS [Go to Page]
5.1 BRACE EFFECTIVE STIFFNESS
5.2 ANALYSIS
5.3 CHECK DEFLECTION [Go to Page]
EQUATION 12.8-15
TABLE 3-12 SUMMARY OF BRACE CORE STRAIN CALCULATION
5.4 ITERATE TO SATISFY DEFLECTION
5.5 BRACE DEFORMATIONS AND CONFIRMATION OF EXPECTED BRACE STRENGTH [Go to Page]
TABLE 3-13 SUMMARY OF BRACE CORE STRAIN CALCULATION
5.6 BRACE CONFORMANCE DEMONSTRATION [Go to Page]
TABLE 3-14 SUMMARY OF BRACE CORE STRAIN CALCULATION
TABLE 3-15 SUMMARY OF BRACE CORE STRAIN CALCULATION
TABLE 3-16 SUMMARY OF BRACE END ROTATIONS
6. ITERATION AND FINAL DESIGN [Go to Page]
6.1 MEMBER SIZES [Go to Page]
FIGURE 3-6 FINAL BRACED-FRAME ELEVATIONS
6.2 BRACE SPECIFICATION
7. DETAILING AND DESIGN OF CONNECTIONS [Go to Page]
7.1 BRB-TO-GUSSET CONNECTION
7.2 GUSSET PLATE REQUIREMENTS
7.3 GUSSET CONNECTION TO BEAM AND COLUMN [Go to Page]
FIGURE 3-7 BRACE CONNECTION DETAILS
7.4 COLUMN SPLICES
7.5 STABILITY BRACING
8, ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 4 SPECIAL PLATE SHEAR WALLS [Go to Page]
1. BUILDING AND SPECIAL PLATE SHEAR WALL LAYOUT [Go to Page]
1.1 GIVEN INFORMATION
1.2 LAYOUT OF SHEAR WALLS [Go to Page]
FIGURE 4-1 PLAN LAYOUT OF SHEAR WALLS
FIGURE 4-2 TYPICAL WALL ELEVATION
TABLE 4-1 BUILDING SESMIC WEIGHT CALCULATION
2. CALCULATION OF THE DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM AND DETERMINE SPECTRAL ACCELERATIONS [Go to Page]
TABLE 4-2 SYSTEM FACTORS FOR SPSW FROM ASCE 7 TABLE 12.2-1
2.2 RESPONSE SPECTRUM [Go to Page]
EQUATION 12.8-7
EQUATION 11.4-5
EQUATION 11.4-6
FIGURE 4-3 DESIGN RESPONSE SPECTRUM FOR THE EXAMPLE BUILDING
2.3 HORIZONTAL IRREGULARITIES
2.4 VERTICAL IRREGULARITIES
2.5 LATERAL FORCE PROCEDURE
2.6 BASE SHEAR [Go to Page]
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
EQUATION 12.8-1
2.7 REDUNDANCY FACTOR
2.8 LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF SHEAR [Go to Page]
EQUATION 12.8-11
EQUATION 12.8-12
TABLE 4-3 VERTICAL DISTRIBUTION OF SHEAR
3.2 HORIZONTAL DISTRIBUTION OF STORY SHEAR [Go to Page]
FIGURE 4-4 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE STORY SHEAR TO SPSW
TABLE 4-4 RIGID DIAPHRAGM ANALYSIS TO DISTRIBUTE SHEAR TO SPSW
TABLE 4-5 STORY FORCES APPLIED TO SPSW 5D
4. PRELIMINARY SIZING OF THE WEB PLATE AND BOUNDARY MEMBERS [Go to Page]
4.1 PRELIMINARY WEB-PLATE DESIGN AND CONSIDERATIONS [Go to Page]
EQUATION F5-1
FIGURE 4-5 EFFECT OF HOLE DIAMETER AND S/D RATION ON LENGTH OF CUT
FIGURE 4-6 FOUR POSSIBLE HOLE ARRANGEMENTS FOR THE PERFORATED SPSW WITH α = 45°
FIGURE 4-7 POSSIBLE VARIATIONS IN THE ANGLE OF HOLES
FIGURE 4-8 EFFECT OF VARYING THE ANGLE OF HOLES ON EFFECTIVE STRIP WIDTH
EQUATION F5-3
TABLE 4-6 PRELIMINARY WEB-PATE DESIGN AT EACH LEVEL
4.3 GENERAL DESCRIPTION OF BOUNDARY ELEMENT DESIGN [Go to Page]
FIGURE 4-9 SPSW DIVIDED INTO PARTS TO SHOW FORCES
FIGURE 4-10 COMPONENTS OF EXPECTED WEB STRENGTH APPLIED TO HBE AND VBE
TABLE 4-7 COMPONENTS OF THE EXPECTED STRENGTH OF THE TENSION FIELD
4.4 OVERVIEW OF ROOF AND SIXTH-FLOOR HBE DESIGN [Go to Page]
FIGURE 4-11 HBE DESIGN FORCES
4.5 FIND THE HBE MOMENT
4.6 FIND THE HBE COMPRESSION FORCE [Go to Page]
EQUATION 12.10-1
EQUATION 12.10-1
4.7 SELECT PRELIMINARY SECTION FOR THE ROOF HBE
4.8 CHECK COMBINED FLEXURE AND AXIAL FOR THE ROOF HBE [Go to Page]
EQUATION E3-4
EQUATION E3-2
EQUATION E3-1
EQUATION F2-5
EQUATION F2-6
EQUATION F2-2
EQUATION H1-1A
4.10 CHECK SHEAR FOR THE ROOF HBE AND SIXTH-FLOOR HBE [Go to Page]
EQUATION G2-1
4.11 SIZE THE REMAINING HBEs [Go to Page]
TABLE 4-8 SUMMARY OF PRELIMINARY HBE DESIGNS
4.12 VBE DESIGN [Go to Page]
TABLE 4-9 LOADS ON VBE DUE TO WEB PLATE AND HBE
FIGURE 4-12 VBE FREE-BODY DIAGRAMS FOR THE CAPACITY-DESIGN APPROACH
4.13 DETERMINE VBE AXIAL FORCES, SHEARS, AND MOMENTS [Go to Page]
FIGURE 4-13 VBE SHEAR AND AMOMENT DUE TO CAPACITY-DESIGN FORCES
TABLE 4-10 MAXIMUM MOMENTS AT THREE LOCATIONS FOR EACH FLOOR
TABLE 4-11 AXIAL FORCES APPLIED TO THE VBE
4.14 SELECT VBE SECTIONS
4.16 CHECK COMBINED FLEXURE AND AXIAL FORCES ON VBE [Go to Page]
EQUATION E3-4
EQUATION E3-2
EQUATION E3-1
EQUATION F2-5
EQUATION F2-1
EQUATION H1-1A
TABLE 4-12 INTERACTION EQUATION VALUES
4.17 STRONG COLUMN-WEAK BEAM CHECK
5. ANALYSIS AND DESIGN (ITERATIVE) [Go to Page]
5.1 CHECK DEFLECTION [Go to Page]
FIGURE 4-14 MODELING OPTIONS TO CHECK DEFLECTION
AISC 341, EQUATION F5-4
AISC 7, EQUATOIN 12.8-15
TABLE 4-13 CALCULATED DEFLECTION FOR PRELIMINARY DESIGN
5.2 ITERATE TO SATISFY DEFLECTION
5.3 FINAL PLATE THICKNESSES AND BOUNDARY MEMBERS [Go to Page]
FIGURE 4-15 FINAL PLATE AND BOUNDARY-MEMBER DESIGN
6. DETAILING AND DESIGN OF CONNECTIONS [Go to Page]
6.1 PANEL ZONE [Go to Page]
AISC 360 EQUATION J10-11
EQUATION 3-7
6.2 HBE-TO-VBE CONNECTION
6.3 PLATE-TO-BOUNDARY ELEMENTS [Go to Page]
FIGURE 4-16 WEB-PLATE-TO-BOUNDARY-ELEMENT CONNECTION
EQUATION J2-5
EQUATION J2-4
FIGURE 4-17 CORNER DETAILS TESTED BY SCHUMACHER et al. (1999)—ALL WERE FOUND TO BE ACCEPTABLE
6.4 COLUMN SPLICE
6.5 BASE OF WALL TO FOUNDATION [Go to Page]
EQUATION C-J3-5A
FIGURE 4-18 WEB-PLATE CONNECTION TO FOUNDATION
6.6 COLUMN CONTINUITY PLATES
6.7 COLUMN BASE CONNECTION [Go to Page]
TABLE 4-14 COLUMN UPLIFT COMPUTED BY THE CAPACITY DESIGN APPROACH
EQUATION C-J3-5A
7. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 5 ECCENTRICALLY BRACED FRAME [Go to Page]
FIGURE 5-1 EBF CONFIGURATIONS
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION
1.2 PLAN OF FRAME LOCATIONS AND TYPICAL ELEVATIONS [Go to Page]
FIGURE 5-2 TYPICAL FLOOR AND FRAMING PLAN
FIGURE 5-3 EBF ELEVATIONS
2. CALCULATION OF THE DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM AND DETERMINE DESIGN COEFFICIENTS AND FACTORS
2.2 DESIGN SPECTRAL RESPONSE ACCELERATION PARAMETERS
2.3 RESPONSE SPECTRUM [Go to Page]
EQUATION 12.8-7
EQUATION 11.4-5
EQUATION 11.4-6
FIGURE 5-4 DESIGN RESPONSE SPECTRUM CURVE FOR THE EBF BUILDING
2.4 HORIZONTAL IRREGULARITIES
2.5 VERTICAL IRREGULARITIES
2.6 REDUNDANCY FACTOR
2.7 ANALYSIS PROCEDURE SELECTION
2.8 SEISMIC RESPONSE COEFFICIENT [Go to Page]
EQUATION 12.8-2
EQUATION 12.8-3
EQUATOIN 12.8-5
EQUATION 12.8-6
2.9 SEISMIC BASE SHEAR [Go to Page]
EQUATION 12.8-1
2.10 SEISMIC LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF LATERAL SEISMIC FORCE [Go to Page]
EQUATION 12.8-11
EQUATION 12.8-12
TABLE 5-1 VERTICAL DISTRIBUTION OF LATERAL SEISMIC FORCE
3.2 HORIZONTAL DISTRIBUTION OF FORCES [Go to Page]
EQUATION 12.8-13
EQUATION 12.8-13 (MODIFIED)
TABLE 5-2 STORY SHEAR RIGID DIAPHRAGM DISTRIBUTION
TABLE 5-3 TYPICAL FRAME SEISMIC DESIGN STORY SHEARS
TABLE 5-4 MODIFIED STORY SHEAR RIGID DIAPHRAGM DISTRIBUTION
4. PRELIMINARY MEMBER SIZING AND ANALYSIS [Go to Page]
4.1 MATERIAL SPECIFICATIONS
4.2 PRELIMINARY LINK SIZE AND LENGTH [Go to Page]
FIGURE 5-5 INVERTED-V FREE BODY DIAGRAM
TABLE 5-5 PRELIMINARY LINK DESIGN SHEAR FORCE
AISC 341 EQUATION F3-2 (MODIFIED)
EQUATION F3-4
EQUATION F3-2
EQUATION F3-8
TABLE 5-6 PRELIMINARY LINK SIZES, SHEAR STRENGTHS, AND LINK LENGTHS
4.3 PRELIMINARY ADJUSTED LINK SHEAR STRENGTH [Go to Page]
TABLE 5-7 PRELIMINARY ADJUSTED LINK SHEAR STRENGTH AND SHEAR RATIO
4.4 PRELIMINARY BUILT-UP LINK BEAM SIZE [Go to Page]
EQUATION F3-2 (MODIFIED)
EQUATION F3-4 (MODIFIED)
TABLE 5-8 PRELIMINARY BUILT-UP LINK BEAM PARAMETERS
TABLE 5-9 PRELIMINARY BUILT-UP LINK BEAM PARAMETERS AND LENGTH
TABLE 5-10 PRELIMINARY ADJUSTED LINK SHEAR STRENGTH AND SHEAR RATION
4.5 PRELIMINARY NON-LINK BEAM SIZE (TWO-STORY X)
4.6 PRELIMINARY BRACE SIZE [Go to Page]
FIGURE 5-6 BEAM SHEAR MOMENT DIAGRAMS
TABLE 5-11 PRELIMINARY BRACE SIZES
4.7 PRELIMINARY COLUMN SIZE [Go to Page]
FIGURE 5-7 COLUMN MECHANISM MODEL
TABLE 5-12 PRELIMINARY COLUMN SIZES
FIGURE 5-8 PRELIMINARY EBF MEMBER SIZES
4.8 ELASTIC MODELING AND STORY DRIFT DETERMINATION [Go to Page]
EQUATION 12.8-15
TABLE 5-13 EBF STORY DRIFT AND SOFT-STORY PARAMETERS
4.9 P-DELTA EFFECTS [Go to Page]
EQUATION 12.8-16
EQUATION 12.8-16
TABLE 5-14 TOTAL UNFACTORED DESIGN LOADS AND STABILITY COEFFICIENT
4.10 SECONDARY EFFECTS
5. ANALYSIS VERIFICATION AND MEMBER FINAL DESIGN [Go to Page]
5.1 LINK BEAM REQUIRED STRENGTHS [Go to Page]
TABLE 5-15 LINK SEGMENT LOADING FOR BM-1
5.2 LINK BEAM WIDTH-TO-THICKNESS RATIOS
5.3 LINK BEAM STRENGTH DESIGN [Go to Page]
EQUATION F3-6
EQUATION F3-1
5.4 LINK ROTATION ANGLE LIMITATION
5.5 BEAM OUTSIDE THE LINK REQUIRED STRENGTHS [Go to Page]
TABLE 5-16 BEAM OUTSIDE THE LINK LOADING FOR BM-1
5.6 BEAM OUTSIDE THE LINK WIDTH-TO-THICKNESS RATIOS
5.7 BEAM OUTSIDE THE LINK STRENGTH DESIGN [Go to Page]
EQUATION F2-5
EQUATION F2-6
EQUATION F2-7
EQUATION E3-4
EQUATION E3-2
EQUATION E3-1
EQUATION F2-2
EQUATION F2-1
EQUATION H1-1A
MANUAL EQUATION 6-1
5.8 DIAGONAL BRACE REQUIRED STRENGTHS [Go to Page]
TABLE 5-17 DIAGONAL BRACE LOADING FOR BR-1
5.9 DIAGONAL BRACE WIDTH-TO-THICKNESS RATIOS
5.10 DIAGONAL BRACE STRENGTH DESIGN [Go to Page]
MANUAL EQUATION 6-1
EQUATION G2-1
5.11 COLUMN REQUIRED STRENGTHS [Go to Page]
TABLE 5-18 COLUMN LOADING FOR C-1
5.12 COLUMN WIDTH-TO-THICKNESS RATIOS
5.13 COLUMN STRENGTH DESIGN [Go to Page]
MANUAL EQUATION 6-1
6. DESIGN AND DETAILING OF CONNECTIONS [Go to Page]
6.1 LINK END STIFFENER REQUIREMENTS
6.2 LINK INTERMEDIATE STIFFENER REQUIREMENTS
6.3 STIFFENER WELD REQUIREMENTS [Go to Page]
AISC 360, EQUATION J2-4 (MODIFIED)
MANUAL EQUATION 8-2A
6.4 BRACE-TO-LINK CONNECTION [Go to Page]
TABLE 5-19 DIAGONAL BRACE CONNECTION LOADING FOR JOINT J-2
EQUATION J3-1
EQUATION J3-6A
EQUATION D3-1
EQUATION J4-1
EQUATION J4-2
EQUATION J4-5
EQUATION J4-6
EQUATION J10-2
EQUATION J10-4
FIGURE 5-9 BRACE-TO-BEAM CONNECTION, J-1, AT THE LINK
6.5 FINAL LINK DESIGN CHECK [Go to Page]
TABLE 5-20 PRELIMINARY LINK LENGTHS, EFFECTIVE LINK LENGTHS, AND LINK CAPACITY RATIOS
6.6 ALTERNATIVE BRACE-TO-LINK CONNECTIONS
6.7 BEAM-TO-COLUMN CONNECTION
6.8 DIAGONAL BRACE-TO-GUSSET CONNECTION
6.9 LINK STABILITY BRACING
6.10 INELASTIC STRAIN AND QUALITY CONSIDERATIONS
7. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 6 MULTI-PANEL OCBF [Go to Page]
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION
1.2 LAYOUT OF BRACED FRAMES [Go to Page]
FIGURE 6-1 PLAN LAYOUT OF BRACED FRAMES
FIGURE 6-2 TYPICAL BRACED FRAME ELEVATION (FRAME HEIGHT IS MEASURED FROM THE TOP OF THE FOOTING)
TABLE 6-1 ASSEMBLY WEIGHTS [Go to Page]
TABLE 6-1 ASSEMBLY WEIGHTS—CONTINUED
TABLE 6-2 ROOF WEIGHTS
2. CALCULATION OF THE DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM AND DETERMINE SPECTRAL ACCELERATION PARAMETERS
2.2 DETERMINE SEISMIC RESPONSE COEFFICIENT
2.3 DESIGN RESPONSE SPECTRUM [Go to Page]
EQUATION 12.8-7
EQUATOIN 11.4-5
EQUATION 11.4-6
FIGURE 6-3 RESPONSE SPECTRUM
2.4 HORIZONTAL IRREGULARITIES
2.5 VERTICAL IRREGULARITIES
2.6 LATERAL FORCE PROCEDURE
2.7 SEISMIC BASE SHEAR [Go to Page]
EQUATION 12.14-12
2.8 SEISMIC LOAD EFFECT AND LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF SHEAR
3.2 HORIZONTAL DISTRIBUTION OF STORY SHEAR
4. PRELIMINARY SIZING [Go to Page]
4.1 DIAGONAL BRACE DESIGN [Go to Page]
FIGURE 6-4 FRAME BF-1 BRACE DESIGN FORCE
AISC 360 EQUATION E3-4
AISC 360 EQUATION E3-2
AISC 360 EQUATION E3-1
4.2 COLUMN DESIGN [Go to Page]
FIGURE 6-5 FRAME BF-1 COLUMN DESIGN FORCES
AISC 360 EQUATION E3-4
AISC 360 EQUATION E3-2
AISC 360 EQUATION E3-1
AISC 360 EQUATION D2-1
4.3 BEAM DESIGN [Go to Page]
FIGURE 6-6 FRAME BF-1 BEAM DESIGN FORCE
AISC 360 EQUATION H1-1A
5. ANALYSIS [Go to Page]
5.1 DETERMINE CRITICAL PANEL [Go to Page]
FIGURE 6-7 FRAME BF-1 PRELIMINARY MEMBER SIZES (CRITICAL PANEL AT TOP OF FRAME)
5.2 COLUMN MOMENTS AND ANALYSIS [Go to Page]
AISC 360 EQUATION F2-1
AISC 360 EQUATION H1.1B
5.3 OUT-OF-PLANE BEHAVIOR [Go to Page]
FIGURE 6-8 OUT-OF-PLANE COLUMN STIFFENING
5.4 DRIFT CALCULATION [Go to Page]
EQUATION 12.8-15
TABLE 6-3 CALCULATED AND MAXIMUM STORY DRIFTS
6. FINAL MEMBER SIZES [Go to Page]
FIGURE 6-9 FRAME BF-1 FINAL MEMER SIZES
7. DISCUSSION TOPICS [Go to Page]
FIGURE 6-10 TWO-STORY X-BRACE CONFIGURATION (LEFT) AND (RIGHT) ONE-STORY X-BRACE CONFIGURATION
8. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 7 METAL DECK DIAPHRAGM [Go to Page]
FIGURE 7-1 DIAPHRAGM COMPONENTS FOR EAST-WEST LOADING
FIGURE 7-2 DIAPHRAGM COMPONENTS FOR NORTH-SOUTH LOADING
DESIGN EXAMPLE 7A BARE METAL DECK (FLEXIBLE) DIAPHRAGM [Go to Page]
1. GIVEN INFORMATION [Go to Page]
1.1 INFORMATION PROVIDED IN APPENDIX A AND DESIGN EXAMPLE 3 [Go to Page]
FIGURE 7A-1 BUILDING ELEVATION WITH STORY HEIGHTS
1.2 METAL DECK TYPES AND DIAPHRAGM CAPACITIES
2. DETERMINATION OF DIAPHRAGM FORCES AND CODE DISCUSSION [Go to Page]
2.1 CALCULATION OF DIAPHRAGM FORCES [Go to Page]
EQUATION 12.8-7
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
EQUATION 12.8-1
TABLE 7A-1 VERTICAL DISTRIBUTION OF SHEAR
EQUATION 12.8-11
EQUATION 12.8-12
TABLE 7A-2 DIAPHRAGM DESIGN FORCES
EQUATION 12.10-1
EQUATION 12.10-2
EQUATION 12.10-3
2.2 DISCUSSION OF DIAPHRAGM FORCES VS. STORY FORCES [Go to Page]
FIGURE 7A-2 COMPARISON OF STORY AND DIAPHRAGM FORCES
2.3 DISCUSSION OF THE USE OF THE REDUNDANCY FACTOR, ρ
2.4 INCREASE OF DIAPHRAGM AND COLLECTOR FORCES PER SECTION 12.3.3.4
2.5 DISCUSSION OF DIAPHRAGM FLEXIBILITY
2.6 OTHER APPROACHES TO DIAPHRAGM DESIGN
3. DIAPHRAGM ANALYSIS WITHOUT OPENINGS [Go to Page]
FIGURE 7A-3 DIAPHRAGM LOADING IN NORTH-SOUTH DIRECTION
FIGURE 7A-4 DIAPHRAGM LOADING IN EAST-WEST DIRECTION
3.1 DIAPHRAGM SHEAR [Go to Page]
FIGURE 7A-5 DIPHRAGM SHEAR IN NORTH-SOUTH DIRECTION
FIGURE 7A-6 DIPHRAGM SHEAR IN EAST-WEST DIRECTION
TABLE 7A-3 DIAPHRAGM SHEAR DEMANDS
3.2 CHORD FORCES [Go to Page]
FIGURE 7A-7 DIAPHRAGM MOMENT IN NORTH-SOUTH DIRECTION
FIGURE 7A-8 DIAPHRAGM MOMENT IN EAST-WEST DIRECTION
3.3 COLLECTOR FORCES [Go to Page]
TABLE 7A-4 COLLECTOR FORCES
FIGURE 7A-9 COLLECTOR DIAGRAM ALONG GRID LINE 1
FIGURE 7A-10 COLLECTOR DIAGRAM ALONG GRID LINE 3
FIGURE 7A-11 COLLECTOR DIAGRAM ALONG GRID LINE 4
FIGURE 7A-12 COLLECTOR DIAGRAM ALONG GRID LINES A AND F
4. DIAPHRAGM ANALYSIS AT OPENING AND AT RE-ENTRANT CORNER [Go to Page]
4.1 ANALYSIS AT OPENING [Go to Page]
FIGURE 7A-13 FORCES AND DEFLECTED SHAPE AT DIAPHRAGM OPENING
FIGURE 7A-14 COLLECTOR FORCES ALONG GRID LINE 4 WITH OPENING TAKEN INTO ACCOUNT
4.2 ANALYSIS AT RE-ENTRANT CORNER [Go to Page]
FIGURE 7A-15 FORCES AT RE-ENTRANT CORNER
5. DIAPHRAGM DESIGN [Go to Page]
5.1 DESIGN FOR SHEAR DEMANDS
5.2 BARE METAL DECK DIAPHRAGM CAPACITY
5.3 DISCUSSION OF DECK FASTENER DUCTILITY
6. CHORD AND COLLECTOR DESIGN [Go to Page]
6.1 DISCUSSION OF ΩO AND COMBINING FORCES FROM PERPENDICULAR LOADING
6.2 COLLECTOR COMPRESSIVE STRENGTH [Go to Page]
EQUATION E3-3
EQUATION E3-1
EQUATION E3-3
EQUATION E3-1
6.3 COLLECTOR FLEXURAL STRENGTH [Go to Page]
EQUATION F2-1
EQUATION F2-3
6.4 COLLECTOR DESIGN FOR COMBINED LOADING [Go to Page]
EQUATION H1-1A
7. COLLECTOR CONNECTION DESIGN [Go to Page]
FIGURE 7A-16 COLLECTOR CONNECTION DETAIL
EQUATION J4-3
EQUATOIN E3-1
EQUATION E3-2
EQUATION E3-4
EQUATION F2-1
EQUATION J4-2
EQUATION J4-4
EQUATION J3-1
EQUATION J3-6C
EQUATION J3-6A
EQUATION J2-4
EQUATION J2-5
EQUATION J4-5
8. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 7B CONCRETE-FILLED DECK (RIGID) DIAPHRAGM [Go to Page]
1. DETERMINATION OF DIAPHRAGM FORCES AND CODE DISCUSSION [Go to Page]
1.1 DISCUSSION OF TORSION [Go to Page]
FIGURE 7B-1 ACCIDENTAL TORSION FOR NORTH-SOUTH LOADING
FIGURE 7B-2 ACCIDENTAL TORSION FOR EAST-WEST LOADING
1.2 FORCE DISTRIBUTION IN RIGID DIAPHRAGMS WITHOUT THE USE OF ANANALYTICAL MODEL [Go to Page]
FIGURE 7B-3 BRBF FORCES DUE TO POSITIVE ACCIDENTAL TORSION IN NORTH-SOUTH DIRECTION
1.3 FORCE DISTRIBUTION IN RIGID DIAPHRAGMS WITH THE USE OF AN ANALYTICALMODEL
2. DIAPHRAGM ANALYSIS [Go to Page]
2.1 CALCULATION OF DIAPHRAGM SHEARS [Go to Page]
TABLE 7B-1 DIAPHRAGM DESIGN FORCES FOR LOADING IN NORTH-SOUTH DIRECTION
TABLE 7B-2 DIAPHRAGM DESIGN FORCES FOR LOADING IN EAST-WEST DIRECTION
FIGURE 7B-4 SPREADSHEET INPUT TO CALCULATE DIAPHRAGM SHEARS IN NORTH-SOUTH DIRECTION
FIGURE 7B-5 SPREADSHEET INPUT TO CALCULATE DIAPHRAGM SHEARS IN EAST-WEST DIRECTION
FIGURE 7B-6 DIAPHRAGM SHEARS FOR LOADING IN NORTH-SOUTH DIRECTION
FIGURE 7B-7 DIAPHRAGM SHEARS FOR LOADING IN EAST-WEST DIRECTION
TABLE 7B-3 FORCES CREATED IN NORTH-SOUTH DIRECTION BY LOADING IN THE EAST-WEST DIRECTION
TABLE 7B-4 FORCES CREATED IN EAST-WEST DIRECTION BY LOADING IN THE NORTH-SOUTH DIRECTION
2.2 CALCULATION OF CHORD FORCES [Go to Page]
FIGURE 7B-8 SPREADSHEET INPUT TO CALCULATE DIAPHRAGM MOMENTS IN NORTH-SOUTH DIRECTION
FIGURE 7B-9 SPREADSHEET INPUT TO CALCULATE DIAPHRAGM MOMENTS IN EAST-WEST DIRECTION
FIGURE 7B-10 DIAPHRAGM MOMENTS FOR LOADING IN NORTH-SOUTH DIRECTION
FIGURE 7B-11 DIAPHRAGM MOMENTS FOR LOADING IN EAST-WEST DIRECTION
2.3 CALCULATION OF COLLECTOR FORCES [Go to Page]
FIGURE 7B-12 COLLECTOR FORCES ALONG GRID LINE 1
FIGURE 7B-13 COLLECTOR FORCES ALONG GRID LINE 3
FIGURE 7B-14 COLLECTOR FORCES ALONG GRID LINE 4
FIGURE 7B-15 COLLECTOR FORCES ALONG GRID LINES A AND F
3. DIAPHRAGM DESIGN [Go to Page]
3.1 METAL DECK SELECTION
3.2 DISCUSSION OF CONCRETE PROPERTIES
3.3 SHEAR STUD DEMAND AND CAPACITY [Go to Page]
FIGURE 7B-16 SHEAR LOADING ON WELDED STUDS AT COMPOSITE BEAMS
EQUATON I8-1
4. CHORD AND COLLECTOR DESIGN [Go to Page]
4.1 FLEXURAL AND AXIAL DEMANDS
4.2 COLLECTOR COMPRESSIVE STRENGTH [Go to Page]
EQUATION E4-4
EQUATION E3-3
EQUATION E3-1
4.3 COLLECTOR FLEXURAL STRENGTH [Go to Page]
EQUATION I3-1A
EQUATION I3-1B
EQUATION I3-1C
4.4 COLLECTOR DESIGN FOR COMBINED LOADING [Go to Page]
EQUATION H1-1A
5. DISCUSSION OF SEMIRIGID DIAPHRAGMS
6. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 8 SPECIAL MOMENT FRAME BASE CONNECTION [Go to Page]
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION [Go to Page]
FIGURE 8-1 GENERAL BASE CONNECTION PROFILE
TABLE 8-1 SECTION PROPERTIES FOR THE COLUMN AND CONNECTING BEAM ABOVE
1.2 SERVICE LOADS AT COLUMN BASE
1.3 LOAD CASES
2. DETERMINE REQUIRED BASE CONNECTION STRENGTH [Go to Page]
2.1 DETERMINE REQUIRED AXIAL STRENGTH
2.2 DETERMINE REQUIRED SHEAR STRENGTH
2.3 DETERMINE REQUIRED FLEXURAL STRENGTH
3. DESIGN BASE PLATE AND ANCHOR RODS [Go to Page]
3.1 DETERMINE INITIAL BASE-PLATE DIMENSIONS
3.2 DETERMINE BASE-PLATE THICKNESS AND SELECT ANCHOR RODS [Go to Page]
FIGURE 8-2 FORCE DISTRIBUTION AT BASE PLATE
DESIGN GUIDE 1, EQUATION 3.4.4
DESIGN GUIDE 1, EQUATOIN 3.4.3
DESIGN GUIDE 1, EQUATOIN 3.4.2
FIGURE 8-3 COMPARISON BETWEEN PARALLEL AND INCLINED YIELD LINES
DESIGN GUIDE 1, EQUATION 3.3.15A-2
DESIGN GUIDE 1, EQUATION 3.4.6
DESIGN GUIDE 1, EQUATION 3.4.7A
3.3 CHECK COMPRESSIVE STRENGTH OF THE BASE PLATE
3.4 GROUT DESIGN
4. BASE CONNECTION SHEAR RESISTANCE [Go to Page]
4.1 SHEAR RESISTANCE THROUGH FRICTION
4.2 PLATE WASHER BEARING STRENGTH [Go to Page]
AISC 341 EQUATION J3-6B
4.3 SHEAR STRENGTH OF ANCHOR RODS [Go to Page]
EQUATION J3-1
4.4 TENSILE STRENGTH OF ANCHOR RODS CONSIDERING COMBINED TENSION AND SHEAR [Go to Page]
EQUATION J3-2
EQUATION J3-3A
4.5 TENSILE STRESS DUE TO TENSION AND BENDING
4.6 SHEAR LUG DESIGN
5. DESIGN COLUMN-TO-BASE PLATE WELD [Go to Page]
FIGURE 8-4 COLUMN-TO-BASE PLATE WELD DETAIL
6. SHEAR RESISTANCE DISCUSSION [Go to Page]
FIGURE 8-5 FORCE DISTRIBUTION WITH ZERO NET AXIAL LOAD
7. ANCHORAGE [Go to Page]
FIGURE 8-6 STRUTS FORMED IN GRADE BEAM DUE TO ANCHORAGE FORCES
FIGURE 8-7 IDEALIZED TRUSS FORMED IN GRADE BEAM RESISTING ANCHORAGE FORCES
FIGURE 8-8 IDEALIZED TRUSS LAYOUT AND FORCE DISTRIBUTION
7.1 DETERMINE DEMANDS
7.2 DETERMINE CAPACITY OF STRUTS, TIES, AND NODAL ZONES [Go to Page]
FIGURE 8-9 GEOMETRY AND APPLIED FORCES AT NODAL ZONE (C)
EQUATION 23.7.2
EQUATION 23.4.1(A)
EQUATION 23.4.3
EQUATION 23.9.2
EQUATION 23.9.1
7.3 DESIGN ANCHOR PLATES
7.4 DESIGN SHEAR REINFORCEMENT [Go to Page]
EQUATION 23.5.3
FIGURE 8-10 BASE CONNECTION DESIGN
DESIGN EXAMPLE 9 BRACED-FRAME BASE PLATE [Go to Page]
1. DESIGN PARAMETERS [Go to Page]
1.1 GIVEN INFORMATION
1.2 PIN VS. FIXED BASE DESIGN [Go to Page]
FIGURE 9-1 BRB CONNECTION FORCE DIAGRAM
2. GUSSET PLATE DESIGN [Go to Page]
2.1 BRB CONNECTION TO GUSSET PLATE
2.2 DETERMINE CONNECTION DESIGN FORCE
2.3 SIZE CONNECTION WELDS [Go to Page]
FIGURE 9-2 CONNECTION WELD REQUIREMENTS
3. BASE PLATE DESIGN [Go to Page]
3.1 COLUMN CONNECTION TO BASE PLATE [Go to Page]
TABLE 9-1 COLUMN DESIGN FORCES
3.2 PLATE MATERIAL SELECTION
3.3 DETERMINE BASE-PLATE THICKNESS [Go to Page]
FIGURE 9-3 BASE-PLATE DIMENSIONS
4. FOUNDATION ANCHORAGE DESIGN [Go to Page]
4.1 SIZE FOUNDATION THICKNESS [Go to Page]
TABLE 9-2 FOUNDATION DESIGN FORCES
FIGURE 9-4 PUNCHING SHEAR
4.2 TRANSFER OF SHEAR TO THE FOUNDATION SYSTEM [Go to Page]
FIGURE 9-5 HSS STRAP CONNECTION
4.3 TRANSFER OF TENSION TO THE FOUNDATION SYSTEM [Go to Page]
FIGURE 9-6 ANCHOR-FORCE DISTRIBUTION
FIGURE 9-7 FOUNDATION ANCHORAGE
5. ITEMS NOT ADDRESSED IN THIS EXAMPLE
DESIGN EXAMPLE 10 CANTILEVER COLUMN BUILDING [Go to Page]
1. BUILDING GEOMETRY AND LOADS [Go to Page]
1.1 GIVEN INFORMATION
1.2 LAYOUT OF COLUMNS [Go to Page]
FIGURE 10-1 PLAN LAYOUT OF COLUMNS
FIGURE 10-2 TYPICAL COLUMN ELEVATION
2. CALCULATION OF THE DESIGN BASE SHEAR AND LOAD COMBINATIONS [Go to Page]
2.1 CLASSIFY THE STRUCTURAL SYSTEM AND DETERMINE SPECTRAL ACCELERATIONS
2.2 DESIGN SPECTRAL ACCELERATIONS
2.3 RESPONSE SPECTRUM [Go to Page]
EQUATION 12.8-7
2.4 HORIZONTAL IRREGULARITIES
2.5 VERTICAL IRREGULARITIES
2.6 LATERAL FORCE PROCEDURE
2.7 BASE SHEAR [Go to Page]
EQUATION 12.8-2
EQUATION 12.8-3
EQUATION 12.8-5
EQUATION 12.8-6
EQUATION 12.8-1
2.8 REDUNDANCY FACTOR
2.9 LOAD COMBINATIONS
3. VERTICAL AND HORIZONTAL DISTRIBUTION OF LOAD [Go to Page]
3.1 VERTICAL DISTRIBUTION OF SHEAR
3.2 HORIZONTAL DISTRIBUTION OF STORY SHEAR
4. PRELIMINARY SIZING OF THE COLUMNS [Go to Page]
4.1 DEFLECTION REQUIREMENTS
4.2 STRENGTH REQUIREMENTS [Go to Page]
EQUATION H1-1B
4.3 SYSTEM REQUIREMENTS
4.4 P-DELTA REQUIREMENTS
5. ITEMS NOT ADDRESSED IN THIS EXAMPLE
APPENDIX A GENERAL BUILDING INFORMATION [Go to Page]
BUILDING GEOMETRY [Go to Page]
FIGURE A1-1 TYPICAL FLOOR AND ROOF FRAMING PLAN
FIGURE A1-2 BUILDING ELEVATION
FIGURE A1-3 BUILDING AXONOMETRIC VIEW
ASSEMBLY WEIGHTS
FLOOR AND ROOF WEIGHTS
DESIGN SPECTRAL ACCELERATIONS
SEISMIC DESIGN CATEGORY
LOAD COMBINATIONS [Go to Page]
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
SEAOC WIND DESIGN MANUAL
2019 EDITION OF THE SEAOC BLUE BOOK: SEISMIC DESIGN RECOMMENDATIONS
TOP TOOLS FOR STRUCTURAL DESIGN
ICC'S DIGITAL CODES LIBRARY [Go to Page]

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2018 IBC SEAOC Structural/Seismic Design Manual Volume 4: Examples for Steel-Framed Buildings, 2018

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