NZS 3106:2009

Committee Representation

Acknowledgement

Copyright

CONTENTS

REFERENCED DOCUMENTS

LATEST REVISIONS

REVIEW OF STANDARDS

Foreword

Outcome statement

1 GENERAL

1.1 Scope

1.2 New Zealand building legislation

1.3 Interpretation

1.4 Appendices

1.5 Design and construction

2 DEFINITIONS AND ABBREVIATIONS

2.1 Definitions

2.2 Abbreviations

2.3 Notation

3 GENERAL DESIGN REQUIREMENTS

3.1 Design methods

3.2 Support structures

3.3 Tanks storing portable water

3.4 Pipework

3.5 Freeboard

4 LOADS AND LOAD COMBINATIONS

4.1 General

4.2 Loads and other actions

4.3 Load control

4.4 Non-symmetric loads for circular tank

4.5 Load combinations for serviceability limit state

4.6 Load combinations for ultimate limit state

5 DESIGN FOR SERVICEABILITY

5.1 General considerations

5.2 Reinforced concrete

5.3 Prestressed concrete

6 DESIGN FOR STRENGTH AND STABILITY AT THE ULTIMATE LIMIT STATE

6.1 General

6.2 Stability design

6.4 Minimum reinforcement

7 DESIGN FOR DURABILITY

APPENDIX

A – EARTHQUAKE ACTIONS

A1 General

A2 Earthquake actions

A3 Structural analysis

B – DESIGN OF REINFORCEMENT TO CONTROL CRACKING

B1 Calculation of crack widths

C – TESTING

C1 General

C2 Testing for liquid tightness

C3 Testing of liquid retaining structures

C4 Testing of roofs

D – THERMAL STRESS COEFFICIENTS

D1 General

D2 Average temperature change

D3 Differential temperature change

D4 Total temperature change

D5 Stresses

Table

1 – Roof temperature criteria

2 – Moisture variation – Shrinkage and swelling strains

3 – Liquid tightness class and leakage control provisions for Group A loads

4 – Reinforcement ratio for fully restrained concrete

5 – Limiting stresses in steel reinforcement where compression zone depth complies with 5.1.1

6 – Limiting stresses in steel reinforcement where compression zone depth is less than 5.1.1

7 – Limiting stresses in prestressed concrete

8 – Exposure classifications

A1 – Displacement ductility factor, μ

A2 – Correction factor kf (μ,ξi)

B1 – Ratio of bond strength

B2 – Strength and deformation characteristics for concrete

D1 – Thermal stress coefficients – Pinned-base condition

D2 – Thermal stress coefficients – Fixed-base condition

D3 – Thermal stress coefficients – Sliding-base condition

Figure

1 – Temperature distributions in tank walls

2 – Effective concrete area

3 – Reduction of stiffness of doubly reinforced wall on cracking (includingtension stiffening effect)

A1 – Damping for horizontal impulsive mode

A2 – Damping for vertical impulsive mode

A3 – Dimensionless period for fundamental sloshing model

A4 – Equivalent weights of impulsive and convective contents (circularand rectangular tanks)

A5 – Equivalent weight distribution

A6 – Horizontal force distribution

A7 – Equivalent heights of impulsive and convective weights for overturning (circular and rectangular tanks)

A8 – Approximate method for estimating buoyancy pressure on roof

B1 – Effective tension area

B2 – Crack width, w, at concrete surface relative to distance from bar

D1 – Differential temperature change

D2 – Total temperature change

© 2009 STANDARDS COUNCIL