NZS 1170.5:2004 (Excludes Amdt 1)
Structural design actions - Part 5: Earthquake actions - New Zealand
Provides procedures for the determination of earthquake actions on structures in New Zealand. It gives the requirements for verification procedures, site hazard determination, the evaluation of structural characteristics, structural analysis for earthquake action effects, the determination and limits for deformations and the seismic design of parts of structures. It is to be applied in conjunction with AS/NZS 1170 parts 0, 1, 2 and 3. Appendices cover aspects of ultimate limit state design and the requirements for material specific structural design standards that are able to be used in conjunction with NZS 1170.5. This standard is used by structural engineers to assess and calculate the forces and deformations from earthquakes acting on structures such as buildings and other structures. It helps engineers design structures that comply with the New Zealand Building Code’s earthquake resistance requirements.
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Technical Committee
PREFACE
CONTENTS
S E C T I O N 1 S C O P E A N D G E N E R A L
1.1 SCOPE
1.2 DETERMINATION OF EARTHQUAKE ACTIONS
1.3 LIMIT STATES
1.4 SPECIAL STUDIES
1.5 REFERENCED DOCUMENTS
1.6 UNITS
1.7 DEFINITIONS
1.8 NOTATION
S E C T I O N 2 V E R I F I C A T I O N
2.1 GENERAL REQUIREMENTS
2.2 STRUCTURAL TYPES
2.3 ULTIMATE LIMIT STATE VERIFICATION
2.4 SERVICEABILITY LIMIT STATE VERIFICATION
2.5 DEFORMATION CONTROL
2.6 STRUCTURE PARTS
S E C T I O N 3 S I T E H A Z A R D S P E C T R A
3.1 ELASTIC SITE SPECTRA FOR HORIZONTAL LOADING
3.2 SITE HAZARD SPECTRA FOR VERTICAL LOADING
S E C T I O N 4 S T R U C T U R A L C H A R A C T E R I S T I C S
4.1 PERIOD OF VIBRATION
4.2 SEISMIC WEIGHT AND SEISMIC MASS
4.3 STRUCTURAL DUCTILITY FACTOR
4.4 STRUCTURAL PERFORMANCE FACTOR, Sp
4.5 STRUCTURAL IRREGULARITY
S E C T I O N 5 D E S I G N E A R T H Q U A K E A C T I O N S
5.1 GENERAL
5.2 HORIZONTAL DESIGN ACTION COEFFICIENTS AND DESIGN SPECTRA
5.3 APPLICATION OF DESIGN ACTIONS
5.4 VERTICAL DESIGN ACTIONS
5.5 GROUND MOTION RECORDS FOR TIME HISTORY ANALYSES
5.6 CAPACITY DESIGN
S E C T I O N 6 S T R U C T U R A L A N A L Y S I S
6.1 GENERAL
6.2 EQUIVALENT STATIC METHOD
6.3 MODAL RESPONSE SPECTRUM METHOD
6.4 NUMERICAL INTEGRATION TIME HISTORY METHOD
6.5 P-DELTA EFFECTS
6.6 ROCKING STRUCTURES AND STRUCTURAL ELEMENTS
S E C T I O N 7 E A R T H Q U A K E I N D U C E D D E F L E C T I O N S
7.1 GENERAL
7.2 DETERMINATION OF DESIGN HORIZONTAL DEFLECTIONS
7.3 DETERMINATION OF DESIGN INTER-STOREY DEFLECTION
7.4 HORIZONTAL DEFLECTION LIMITS
7.5 INTER-STOREY DEFLECTION LIMITS
S E C T I O N 8 R E Q U I R E M E N T S F O R P A R T S A N D C O M P O N E N T S
8.1 GENERAL
8.2 DESIGN RESPONSE COEFFICIENT FOR PARTS
8.3 FLOOR HEIGHT COEFFICIENT , CHi
8.4 PART SPECTRAL SHAPE COEFFICIENT
8.5 DESIGN ACTIONS ON PARTS
8.6 PART RESPONSE FACTOR Cph
8.7 CONNECTIONS
APPENDIX A DEFINITIONS
APPENDIX B NOTATION
APPENDIX C DESIGNING FOR ULTIMATE LIMIT STATE
APPENDIX D REQUIREMENTS FOR MATERIAL DESIGN STANDARDS
Table
3.1 SPECTRAL SHAPE FACTOR, Ch (T)
3.2 MAXIMUM DEPTH LIMITS FOR SITE SUBSOIL CLASS C
3.3 Z-VALUES AND SHORTEST MAJOR FAULT DISTANCES D FOR NEW ZEALAND LOCATIONS (North to South)
3.4 ALPHABETICAL LIST OF LOCATIONS
3.5 RETURN PERIOD FACTOR
3.6 MAJOR FAULTS REQUIRING NEAR-FAULT FACTORS > 1.0
3.7 MAXIMUM NEAR-FAULT FACTORS Nmax(T)
6.1 DEFLECTION SCALE FACTORS
7.1 DRIFT MODIFICATION FACTOR
8.1 CLASSIFICATION OF PARTS
8.2 PART RESPONSE FACTOR, Cph and Cpv
C1 VALUES OF ks
STANDARDS COUNCIL APPROVAL
- A1
- B1
- G12
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Technical Committee
PREFACE
CONTENTS
S E C T I O N 1 S C O P E A N D G E N E R A L
1.1 SCOPE
1.2 DETERMINATION OF EARTHQUAKE ACTIONS
1.3 LIMIT STATES
1.4 SPECIAL STUDIES
1.5 REFERENCED DOCUMENTS
1.6 UNITS
1.7 DEFINITIONS
1.8 NOTATION
S E C T I O N 2 V E R I F I C A T I O N
2.1 GENERAL REQUIREMENTS
2.2 STRUCTURAL TYPES
2.3 ULTIMATE LIMIT STATE VERIFICATION
2.4 SERVICEABILITY LIMIT STATE VERIFICATION
2.5 DEFORMATION CONTROL
2.6 STRUCTURE PARTS
S E C T I O N 3 S I T E H A Z A R D S P E C T R A
3.1 ELASTIC SITE SPECTRA FOR HORIZONTAL LOADING
3.2 SITE HAZARD SPECTRA FOR VERTICAL LOADING
S E C T I O N 4 S T R U C T U R A L C H A R A C T E R I S T I C S
4.1 PERIOD OF VIBRATION
4.2 SEISMIC WEIGHT AND SEISMIC MASS
4.3 STRUCTURAL DUCTILITY FACTOR
4.4 STRUCTURAL PERFORMANCE FACTOR, Sp
4.5 STRUCTURAL IRREGULARITY
S E C T I O N 5 D E S I G N E A R T H Q U A K E A C T I O N S
5.1 GENERAL
5.2 HORIZONTAL DESIGN ACTION COEFFICIENTS AND DESIGN SPECTRA
5.3 APPLICATION OF DESIGN ACTIONS
5.4 VERTICAL DESIGN ACTIONS
5.5 GROUND MOTION RECORDS FOR TIME HISTORY ANALYSES
5.6 CAPACITY DESIGN
S E C T I O N 6 S T R U C T U R A L A N A L Y S I S
6.1 GENERAL
6.2 EQUIVALENT STATIC METHOD
6.3 MODAL RESPONSE SPECTRUM METHOD
6.4 NUMERICAL INTEGRATION TIME HISTORY METHOD
6.5 P-DELTA EFFECTS
6.6 ROCKING STRUCTURES AND STRUCTURAL ELEMENTS
S E C T I O N 7 E A R T H Q U A K E I N D U C E D D E F L E C T I O N S
7.1 GENERAL
7.2 DETERMINATION OF DESIGN HORIZONTAL DEFLECTIONS
7.3 DETERMINATION OF DESIGN INTER-STOREY DEFLECTION
7.4 HORIZONTAL DEFLECTION LIMITS
7.5 INTER-STOREY DEFLECTION LIMITS
S E C T I O N 8 R E Q U I R E M E N T S F O R P A R T S A N D C O M P O N E N T S
8.1 GENERAL
8.2 DESIGN RESPONSE COEFFICIENT FOR PARTS
8.3 FLOOR HEIGHT COEFFICIENT , CHi
8.4 PART SPECTRAL SHAPE COEFFICIENT
8.5 DESIGN ACTIONS ON PARTS
8.6 PART RESPONSE FACTOR Cph
8.7 CONNECTIONS
APPENDIX A DEFINITIONS
APPENDIX B NOTATION
APPENDIX C DESIGNING FOR ULTIMATE LIMIT STATE
APPENDIX D REQUIREMENTS FOR MATERIAL DESIGN STANDARDS
Table
3.1 SPECTRAL SHAPE FACTOR, Ch (T)
3.2 MAXIMUM DEPTH LIMITS FOR SITE SUBSOIL CLASS C
3.3 Z-VALUES AND SHORTEST MAJOR FAULT DISTANCES D FOR NEW ZEALAND LOCATIONS (North to South)
3.4 ALPHABETICAL LIST OF LOCATIONS
3.5 RETURN PERIOD FACTOR
3.6 MAJOR FAULTS REQUIRING NEAR-FAULT FACTORS > 1.0
3.7 MAXIMUM NEAR-FAULT FACTORS Nmax(T)
6.1 DEFLECTION SCALE FACTORS
7.1 DRIFT MODIFICATION FACTOR
8.1 CLASSIFICATION OF PARTS
8.2 PART RESPONSE FACTOR, Cph and Cpv
C1 VALUES OF ks
STANDARDS COUNCIL APPROVAL
- A1
- B1
- G12
NZS 1170.5:2004 (Excludes Amdt 1)
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The cost of your subscription will depend on which standards you want to access, and how many people in your organisation need to be able to access the Online Library subscription at the same time (concurrent users). During your subscription period, we are also able to make any necessary changes and ensure you are aware of any pricing changes that result. For a quote, contact our Online Library team by emailing onlinelibrary@standards.govt.nz.