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AS 1170.4-2007
[Available Superseded]Structural design actions, Part 4: Earthquake actions in Australia
Sets out data and procedures for determining earthquake loads on structures and their components, and also minimum detailing requirements for structures. Domestic structures are covered in an Appendix.
Published: 09/10/2007
Pages: 45
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
1 Scope and general
1.1 Scope
1.2 Normative references
1.3 Definitions
1.4 Notation and units
1.5 Levels, weights and forces of the structure
2 Design procedure
2.1 General
2.2 Design procedure
3 Site hazard
3.1 Annual probability of exceedance (P) and probability factor (kp)
3.2 Hazard design factor (Z)
3.3 The product kpZ
4 Site sub-soil class
4.1 Determination of site sub-soil class
4.1.1 General
4.1.2 Hierarchy for site classification methods
4.1.3 Evaluation of periods for layered sites
4.2 Class definitions
4.2.1 Class Ae—Strong rock
4.2.2 Class Be—Rock
4.2.3 Class Ce—Shallow soil site
4.2.4 Class De—Deep or soft soil site
4.2.5 Class Ee—Very soft soil site
5 Earthquake design
5.1 General
5.2 Basic design principles
5.2.1 Seismic-force-resisting system
5.2.2 Tying structure together
5.2.3 Performance under earthquake deformations
5.2.4 Walls
5.2.5 Diaphragms
5.3 Earthquake design category I (EDC I)
5.4 Earthquake design category II (EDC II)
5.4.1 General
5.4.2 Strength and stability provisions
5.4.2.1 General
5.4.2.2 Earthquake forces—equivalent static method
5.4.2.3 Simplified design for structures not exceeding 15 m
5.4.3 Vertical earthquake actions
5.4.4 Drift
5.4.5 Pounding
5.4.6 Parts and components
5.5 Earthquake design category III (EDC III)
5.5.1 General
5.5.2 Strength and stability provisions
5.5.2.1 General
5.5.2.2 Earthquake forces—Dynamic analysis
5.5.3 Vertical earthquake actions
5.5.4 Drift
5.5.5 Pounding
5.5.6 Parts and components
6 Equivalent static analysis
6.1 General
6.2 Horizontal equivalent static forces
6.2.1 Earthquake base shear
6.2.2 Gravity load
6.2.3 Natural period of the structure
6.3 Vertical distribution of horizontal forces
6.4 Spectral shape factor (Ch(T))
6.5 Determination of structural ductility (μ) And structural performance factor (Sp)
6.6 Torsional effects
6.7 Drift determination and P-delta effects
6.7.1 General
6.7.2 Storey drift determination
6.7.3 P-delta effects
6.7.3.1 Stability coefficient
6.7.3.2 Calculating P-delta effects
7 Dynamic analysis
7.1 General
7.2 Earthquake actions
7.3 Mathematical model
7.4 Modal analysis
7.4.1 General
7.4.2 Number of modes
7.4.3 Combining modes
7.4.4 Torsion
7.4.4.1 Three-dimensional dynamic analysis
7.4.4.2 Two-dimensional dynamic analysis with static analysis for torsion
7.5 Drift determination and P-delta effects
8 Design of parts and components
8.1 General requirements
8.1.1 General
8.1.2 Earthquake actions
8.1.3 Forces on components
8.1.4 Parts and components
8.2 Method using design accelerations
8.3 Simple method
Appendix A
A1 General
A2 Design and detailing
Amendment control sheet
AS 1170.4—2007
Amendment No. 1 (2015)
Revised text
Amendment No. 2 (2018)
Revised text
Bibliography
Cited references in this standard
[Current]
Structural design actions, Part 0: General principles - Commentary (Supplement to AS/NZS 1170.0:2002)
Content history
[Current]
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[Current]
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