NZS 1170.5:2004 (Includes 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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NZS 1170.5:2004 STRUCTURAL DESIGN ACTIONS – EARTHQUAKE ACTIONS – NEW ZEALAND
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
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
SECTION 2 VERIFICATION
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
2.7 DEFORMATION DEMANDS ON STRUCTURAL MEMBERS NOT DESIGNED TO RESIST SEISMIC ACTIONS
SECTION 3 SITE HAZARD SPECTRA
3.1 ELASTIC SITE SPECTRA FOR HORIZONTAL LOADING
3.2 SITE HAZARD SPECTRA FOR VERTICAL LOADING
SECTION 4 STRUCTURAL CHARACTERISTICS
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
SECTION 5 DESIGN EARTHQUAKE ACTIONS
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
5.7 DIAPHRAGMS
SECTION 6 STRUCTURAL ANALYSIS
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
SECTION 7 EARTHQUAKE INDUCED DEFLECTIONS
7.1 GENERAL
7.2 DETERMINATION OF DESIGN HORIZONTAL DEFLECTIONS
7.3 DETERMINATION OF INTER-STOREY DEFLECTION
7.4 HORIZONTAL DEFLECTION LIMITS
7.5 INTER-STOREY DEFLECTION LIMITS
SECTION 8 REQUIREMENTS FOR PARTS AND COMPONENTS
8.1 GENERAL
8.2 DESIGN RESPONSE COEFFICIENT FOR PARTS AND COMPONENTS
8.3 FLOOR HEIGHT COEFFICIENT , CHi
8.4 PART OR COMPONENT SPECTRAL SHAPE COEFFICIENT
8.5 DESIGN ACTIONS ON PARTS AND COMPONENTS
8.6 PART OR COMPONENT RESPONSE FACTOR Cph
8.7 CONNECTIONS
8.8 PARTS SUPPORTED ON LEDGES
APPENDIX A – DEFINITIONS
APPENDIX B – NOTATION
APPENDIX C – DESIGNING FOR ULTIMATE LIMIT STATE
APPENDIX D – REQUIREMENTS FOR MATERIAL DESIGN STANDARDS
Amendments
Related Information
Building Code Compliance Document B1
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: VM1
Citation context:Applicable to NZS 1170.5:2004 (unamended version only), i.e. excluding amendment 1
HSNOCOP 61 Rotationally Moulded Polyethylene Storage Tanks for Non Flammable Hazardous Substances - Revoked
Ministry: Association of Rotational Moulders Australasia Inc
Section: 1.4
Citation context:NZS 1170.5 means the standard Structural design actions, Part 5: Earthquake actions – New Zealand
HSNOCOP 61 Rotationally Moulded Polyethylene Storage Tanks for Non Flammable Hazardous Substances - Revoked
Ministry: Association of Rotational Moulders Australasia Inc
Section: 2.1(iv)
Citation context:Earthquake design loads in New Zealand are to be determined using... ...and NZS 1170.5.
HSNOCOP 61 Rotationally Moulded Polyethylene Storage Tanks for Non Flammable Hazardous Substances - Revoked
Ministry: Association of Rotational Moulders Australasia Inc
Section: 2.2
Citation context:For New Zealand, the designer shall use the requirements of... ...and NZS 1170.5.
Traffic control devices manual - Part 3 - Advertising signs
Ministry: NZ Transport Agency
Section: 5.6
Citation context:The RSMA Compliance standard for traffic signs 2008 provides guidance and specifications for the design of frangible supports including reference to: • specific designs to Australian Standard/New Zealand Standard 1170 Structural Design Actions Set (AS/NZS1170)...
Building Code Compliance Document G12
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: AS2
Citation context:HSNOCOP 59 Burners Complying with EN 746 - Revoked
Ministry: Environmental Protection Authority
Section: 5
Citation context:The standard AS 2121 specified in clause 6.2.1(b) Construction of AS 1375-1985 shall be substituted by NZS 1170.5: 2004 Structural Design Actions Part 5: Earthquake actions – New Zealand
Best Practice Guideline For Scaffolding In New Zealand
Ministry: Scaffolding and Rigging New Zealand
Section: 1.2.2.3 Environmental loads
Citation context:Where appropriate, the environmental loads shall include the following: …Earthquake loads in accordance with AS/NZS 1170 (and supplements).
Best Practice Guideline For Scaffolding In New Zealand
Ministry: Scaffolding and Rigging New Zealand
Section: 9.1.1
Citation context:Table 15 contains a general list of applicable relevant standards a number of which have been consulted in the preparation of the BPG. Additional information on particular standards and specific referencing are contained at various points throughout this
Best Practice Guideline For Scaffolding In New Zealand
Ministry: Scaffolding and Rigging New Zealand
Section: 6.13.3 Falsework design
Citation context:In determining what information to consult and how to approach falsework design, no single document provides all the answers. Sources of information for scaffolders, chartered and design engineers include: …AS/NZS 1170 parts 0 - 3 and NZS 1170.5; ...
Hazardous Substances (Dangerous Goods And Scheduled Toxic Substances) Transfer Notice 2004
Ministry: Environmental Protection Authority
Section: Schedule 8, Regulation 8(4)(a)(v)
Citation context:Every above ground stationary tank used to store hazardous liquids must be designed and constructed in accordance with ... AS/NZS 1170.5:2004 or ...
Best Practice Guideline For Scaffolding In New Zealand
Ministry: Scaffolding and Rigging New Zealand
Section: 1.2.1.1
Citation context:Relevant standards are those related to… …This includes but is not limited to the following: ...NZS 1170.5 Structural design actions - Earthquake actions-New Zealand...
Approved Code Of Practice For Cranes
Ministry: WorkSafe New Zealand
Section: 2.4(3)(a)
Citation context:Designers shall ensure that all equipment or any alterations to equipment are designed in accordance with the appropriate standards specified in Appendix C of this code, or otherwise recognised by the Secretary. This includes taking into account any seism
Approved Code Of Practice For Cranes
Ministry: WorkSafe New Zealand
Section: Appendix C Referenced documents
Citation context:NZS 1170.5 Structural Design Actions – Earthquake Actions
Health and Safety at Work (Hazardous Substances—Above Ground Rotationally-Moulded Polyethylene Stationary Tanks) Safe Work Instrument 2017
Ministry: WorkSafe New Zealand
Section: Interpretation
Citation context:NZS 1170.5 means the New Zealand standard NZS 1170.5:2004 Structural design actions - Part 5: Earthquake actions - New Zealand
Safe work with precast concrete
Ministry: WorkSafe New Zealand
Section: 6.0
Citation context:Listed as a relevant standard
Safe work with precast concrete
Ministry: WorkSafe New Zealand
Section: 9.4
Citation context:The design of storage and transport frames should meet standards outlined in:... ...AS/NZS 1170 series: New Zealand structural design actions standard series.... ...Storage racks, frames and supports should be designed for the shape, size and weight of the precast concrete element, and to resist the loads and forces applied to them. Design should consider wind zones and ground conditions, and refer to the latest version of the following standards:... ...New Zealand structural design actions standard (AS/NZS 1170)
Health and Safety at Work (Hazardous Substances) Regulations 2017
Ministry: WorkSafe New Zealand
Section: 17.2
Citation context:NZS 1170.5:2004 means the New Zealand Standard on Structural design actions—Part 5: Earthquake Actions—New Zealand
Health and Safety at Work (Hazardous Substances) Regulations 2017
Ministry: WorkSafe New Zealand
Section: 17.6(3)
Citation context:A relevant PCBU must ensure that an above ground stationary tank used to store hazardous liquids is designed, constructed, and installed to (a) the seismic and wind loading requirements specified in... ...(iv) NZS 1170.5:2004; or...
Health and Safety at Work (Hazardous Substances—Above Ground Rotationally-Moulded Polyethylene Stationary Tanks) Safe Work Instrument 2017
Ministry: WorkSafe New Zealand
Section: 8(1)
Citation context:A relevant PCBU must ensure that the following primary load cases are applied to an FEA model:... ...(d) earthquake loads, Eu, derived from NZS 1170.5:...
Safe work with precast concrete
Ministry: WorkSafe New Zealand
Section: 6.4
Citation context:Falsework and temporary works should be designed to resist all reasonably foreseeable loads, including:... ...seismic loads for temporary structures in accordance with AS/NZS 1170.5.
Safe work with precast concrete
Ministry: WorkSafe New Zealand
Section: 6.7
Citation context:Seismic assessment of precast concrete elements on multi-storey structures requires a detailed structural analysis by a competent person. The design of the temporary support system should be in accordance with the ‘Parts and Components’ section of AS/NZS 1170.5.
Building (Dam Safety) Regulations 2022
Ministry: Ministry of Business, Innovation, and Employment - Building Systems Performance (BSP)
Section: 20
Citation context:Effective 13/05/2024 - the seismic hazard factor (Z factor) must be calculated in accordance with New Zealand Standard NZS 1170.5:2004 (Structural design actions—Part 5: Earthquake actions—New Zealand), whether or not that standard would otherwise apply.
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NZS 1170.5:2004 STRUCTURAL DESIGN ACTIONS – EARTHQUAKE ACTIONS – NEW ZEALAND
PREFACE
CONTENTS
SECTION 1 SCOPE AND GENERAL
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
SECTION 2 VERIFICATION
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
2.7 DEFORMATION DEMANDS ON STRUCTURAL MEMBERS NOT DESIGNED TO RESIST SEISMIC ACTIONS
SECTION 3 SITE HAZARD SPECTRA
3.1 ELASTIC SITE SPECTRA FOR HORIZONTAL LOADING
3.2 SITE HAZARD SPECTRA FOR VERTICAL LOADING
SECTION 4 STRUCTURAL CHARACTERISTICS
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
SECTION 5 DESIGN EARTHQUAKE ACTIONS
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
5.7 DIAPHRAGMS
SECTION 6 STRUCTURAL ANALYSIS
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
SECTION 7 EARTHQUAKE INDUCED DEFLECTIONS
7.1 GENERAL
7.2 DETERMINATION OF DESIGN HORIZONTAL DEFLECTIONS
7.3 DETERMINATION OF INTER-STOREY DEFLECTION
7.4 HORIZONTAL DEFLECTION LIMITS
7.5 INTER-STOREY DEFLECTION LIMITS
SECTION 8 REQUIREMENTS FOR PARTS AND COMPONENTS
8.1 GENERAL
8.2 DESIGN RESPONSE COEFFICIENT FOR PARTS AND COMPONENTS
8.3 FLOOR HEIGHT COEFFICIENT , CHi
8.4 PART OR COMPONENT SPECTRAL SHAPE COEFFICIENT
8.5 DESIGN ACTIONS ON PARTS AND COMPONENTS
8.6 PART OR COMPONENT RESPONSE FACTOR Cph
8.7 CONNECTIONS
8.8 PARTS SUPPORTED ON LEDGES
APPENDIX A – DEFINITIONS
APPENDIX B – NOTATION
APPENDIX C – DESIGNING FOR ULTIMATE LIMIT STATE
APPENDIX D – REQUIREMENTS FOR MATERIAL DESIGN STANDARDS
Amendments
NZS 1170.5:2004 (Includes Amdt 1)
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.