review of the proposed revisions to as3600, concrete...

wyche consulting

Review of the Proposed Revisions to AS3600, Concrete Structures

Talk presented by Joe Wyche, Director, Wyche Consulting

Institution of Engineers Australia, Perth WA

20 June 2006

20 June 2006Proposed Revisions to AS3600, Concrete Structures

THE BD002 COMMITTEE which produces the DRAFT AS3600

Membership by Invitation of approximately 20, includes

Chairman (Consulting Engineer), Secretary (Standards Association)8 Academics8 Industry Representatives - ACEA, C&CAA, CIA, SRIA, Premix IndustryOthers Austroads, ABCB

Regular attendees at meetings about 16, includes typically- Chairman, Secretary- all 8 academics- one each from ACEA, C&CAA, CIA, SRIA, Premix Industry

NOTE ALSO THAT THE STANDARDS ASSOCIATION IS INDEPENDENT OF STANDARDS AUSTRALIA, AND IS NOWA TRUST FINANCED BY THE SALE TO STANDARDS AUSTRALIA OF THEIR PREVIOUS COMMERCIAL ACTIVITIES

The pdf files used for this talk may be downloaded from our website at "wyche.com.au"

wyche consulting

wyche consulting

Current AS3600

SECTION 2SECTION 3

Draft AS3600

LAYOUT OF SECTIONS

THE GENERAL FORMAT AND LAYOUT OF THE STANDARD HAS BEEN KEPT, BUT IT HAS BEEN EXTENSIVELY REWORDED AND MANY OTHER CHANGES HAVE BEEN MADE. SOME PRINCIPAL DIFFERENCES ARE:

- CONCRETE STRENGTH UP TO 100 MPA IS NOW INCLUDED- THE TYPES OF STRUCTURES COVERED OR NOT COVERED BY THE STANDARD IS MORE CLEARLY SET OUT- TRIMMED DOWN BY REFERENCING OTHER STANDARDS INSTEAD OF REPEATING PARTS FROM THEM- EXTRA AND REVISED INFORMATION IS GIVEN FOR FIRE DESIGN, MATERIALS PROPERTIES- THE NUMBER OF ANALYSIS METHODS IS GREATLY EXPANDED AND NEW STANDARDS FOR ANALYSIS GIVEN- A COMPLETE NEW SECTION ON STRUT AND TIE MODELLING HAS BEEN ADDED- CHANGES TO SHEAR AND MAJOR CHANGES TO TORSION SECTIONS TO CORRECT ERRORS IN EXISTING STANDARD

SECTION 1SECTION 2SECTION 1

SECTION 4 SECTION 4

LOADS AND LOAD COMBINATIONS FOR STABILITY, STRENGTH AND SERVICEABILITY

DESIGN REQUIREMENTS AND PROCEDURESSCOPE AND GENERAL

DESIGN FOR DURABILITY

DESIGN PROCEDURES, ACTIONS AND LOADSSCOPE AND GENERAL

LOADS AND LOAD COMBINATIONS etc omittedentirely in Draft AS3600, but some provisions placedin new Section 2DESIGN FOR DURABILITY

SECTION 5 DESIGN FOR FIRE RESISTANCE SECTION 5 DESIGN FOR FIRE RESISTANCESECTION 6 DESIGN PROPERTIES OF MATERIALS SECTION 3 DESIGN PROPERTIES OF MATERIALS

SECTION 3

SECTION 7 METHODS OF STRUCTURAL ANALYSIS SECTION 6 METHODS OF STRUCTURAL ANALYSISSECTION 8 BEAMS FOR STRENGTH AND SERVICEABILITY SECTION 8 DESIGN OF BEAMS FOR STRENGTH AND

SERVICEABILITY

20 June 2006Proposed Revisions to AS3600, Concrete Structures

wyche consulting 20 June 2006Proposed Revisions to AS3600, Concrete Structures

Current AS3600 Draft AS3600LAYOUT OF SECTIONS (CONTINUED)

SECTION 9SECTION 9 DESIGN OF SLABS FOR STRENGTH ANDSERVICEABILITY

DESIGN OF SLABS FOR STRENGTH ANDSERVICEABILITY

SECTION 10 DESIGN OF COLUMNS FOR STRENGTH ANDSERVICEABILITY

SECTION 10 DESIGN OF COLUMNS FOR STRENGTH ANDSERVICEABILITY

SECTION 11 DESIGN OF WALLS SECTION 11 DESIGN OF WALLSSECTION 12 DESIGN OF NON-FLEXURAL MEMBERS, END

ZONES AND BEARING SURFACESSECTION 12 DESIGN OF NON-FLEXURAL MEMBERS, END

ZONES AND BEARING SURFACES

STRUT AND TIE MODELLINGSECTION 7plus

SECTION 13 STRESS DEVELOPMENT AND SPLICING OFREINFORCEMENT AND TENDONS

SECTION 13 STRESS DEVELOPMENT AND SPLICING OFREINFORCEMENT AND TENDONS

SECTION 14 JOINTS, EMBEDDED ITEMS, FIXINGS ANDCONNECTIONS

SECTION 14 JOINTS, EMBEDDED ITEMS, FIXINGS ANDCONNECTIONS

SECTION 15 PLAIN CONCRETE MEMBERS SECTION 15 PLAIN CONCRETE PEDESTALS ANDFOOTINGS

SECTION 16 CONCRETE PAVEMENTS, FLOORS ANDRESIDENTIAL FOOTINGS

SECTION 16 SLAB ON GROUND FLOORS ANDPAVEMENTS

SECTION 17 LIQUID RETAINING STRUCTURES SECTION 17 LIQUID RETAINING STRUCTURESSECTION 18 MARINE STRUCTURES SECTION 18 MARINE STRUCTURESSECTION 19 MATERIAL AND CONSTRUCTION

REQUIREMENTSSECTION 17 MATERIAL AND CONSTRUCTION

REQUIREMENTS


Current AS3600 Draft AS3600LAYOUT OF SECTIONS (CONTINUED)APPENDICES

A ADDITIONAL REQUIREMENTS FORSTRUCTURES SUBJECT TO EARTHQUAKELOADS

A REQUIREMENTS FOR STRUCTURESSUBJECT TO EARTHQUAKE ACTIONS

APPENDICES

B TESTING OF MEMBERS AND STRUCTURES B TESTING OF MEMBERS AND STRUCTURESC REFERENCED DOCUMENTS C NORMATIVE REFERENCES

plusD BIBLIOGRAPHY


Current AS3600 Draft AS3600

Draft AS3600

Current AS3600

Current AS3600

Draft AS3600 No comment given about alternative materials or methods.

SECTION 1 SCOPE AND GENERAL SECTION 1 SCOPE AND GENERAL


Current AS3600 Draft AS3600SECTION 2SECTION 3 LOADS AND LOAD COMBINATIONS FOR

STABILITY, STRENGTH AND SERVICEABILITY

DESIGN REQUIREMENTS AND PROCEDURES SECTION 2SECTION 3 LOADS AND LOAD COMBINATIONS etc omitted

entirely in Draft AS3600, but some provisions placedin new Section 2

DESIGN PROCEDURES, ACTIONS AND LOADS

Current AS3600

and later in Section 2 "Design for" Clauses 2.5 Prototype Testing, 2.6 Durability, 2.7 Fire, 2.8 Other







Draft AS3600







Draft AS3600

Current AS3600

There seems to be no direct reference to stability in the Draft AS3600. Is it covered in AS1170?







Current AS3600


Current AS3600 Draft AS3600SECTION 3 LOADS AND LOAD COMBINATIONS FOR

STABILITY, STRENGTH AND SERVICEABILITYSECTION 3 LOADS AND LOAD COMBINATIONS etc omitted


DESIGN PROCEDURES, ACTIONS AND LOADSSECTION 2DESIGN REQUIREMENTS AND PROCEDURESSECTION 2

Current AS3600

Draft AS3600






Draft AS3600






Draft AS3600

Current AS3600 Design for Serviceability i.e. deflection and cracking is reworded but relatively unchanged.






Draft AS3600


Current AS3600 Draft AS3600Current AS3600SECTION 4 DESIGN FOR DURABILITY SECTION 4 DESIGN FOR DURABILITY

Draft AS3600

Plain Concretenot inDraft AS3600


Current AS3600 Draft AS3600SECTION 4 DESIGN FOR DURABILITY SECTION 4 DESIGN FOR DURABILITY

Draft AS3600


Current AS3600 Draft AS3600SECTION 4 DESIGN FOR DURABILITY SECTION 4 DESIGN FOR DURABILITY

Current AS3600

Draft AS3600


Current AS3600 Draft AS3600SECTION 4 DESIGN FOR DURABILITY SECTION 4 DESIGN FOR DURABILITYCurrent AS3600

Draft AS3600


Current AS3600 Draft AS3600SECTION 5 DESIGN FOR FIRE RESISTANCE DESIGN FOR FIRE RESISTANCESECTION 5

Draft AS3600

Current AS3600



Current AS3600



Draft AS3600



Draft AS3600

Current AS3600 Not included in Draft AS3600



Draft AS3600

Current AS3600SECTION 6 DESIGN PROPERTIES OF MATERIALS SECTION 3 DESIGN PROPERTIES OF MATERIALS

no Table 3.1.2 given yet

Current AS3600 in lieu of tests - characteristic flexural tensile strength

and characteristic principal tensile strength

Draft AS3600 in lieu of tests - characteristic flexural and uniaxial tensile strength



Draft AS3600

Current AS3600SECTION 6 DESIGN PROPERTIES OF MATERIALS SECTION 3 DESIGN PROPERTIES OF MATERIALS

Draft AS3600

in lieu of tests - Modulus of Elasticity

in lieu of tests - Modulus of Elasticity


Current AS3600 Draft AS3600Current AS3600SECTION 6 DESIGN PROPERTIES OF MATERIALS SECTION 3 DESIGN PROPERTIES OF MATERIALS

Draft AS3600


Current AS3600 Draft AS3600SECTION 6 DESIGN PROPERTIES OF MATERIALS SECTION 3 DESIGN PROPERTIES OF MATERIALS

Draft AS3600



Draft AS3600Current AS3600



Current AS3600

Draft AS3600



Draft AS3600Current AS3600

Draft AS3600



Draft AS3600

Current AS3600


Current AS3600 Draft AS3600SECTION 6 DESIGN PROPERTIES OF MATERIALS SECTION 3 DESIGN PROPERTIES OF MATERIALSCurrent AS3600

Draft AS3600



Draft AS3600

Current AS3600DESIGN PROPERTIES OF MATERIALSSECTION 3DESIGN PROPERTIES OF MATERIALSSECTION 6

Draft AS3600


Current AS3600 Draft AS3600Current AS3600SECTION 7 METHODS OF STRUCTURAL ANALYSIS SECTION 6 METHODS OF STRUCTURAL ANALYSIS



Current AS3600

SECTION 7 METHODS OF STRUCTURAL ANALYSIS SECTION 6 METHODS OF STRUCTURAL ANALYSIS


Current AS3600 Draft AS3600Draft AS3600




Current AS3600


Draft AS3600

Simplified Methods retained but Draft AS3600 contains penalties for L class reinforcement compared withN Class reinforcement.Idealised Frame method retained.

Current AS3600 LINEAR ELASTIC ANALYSIS essentially unchanged although Draft AS3600 is substantially reworded.



Draft AS3600


Current AS3600 Draft AS3600SECTION 7 METHODS OF STRUCTURAL ANALYSIS SECTION 6 METHODS OF STRUCTURAL ANALYSISDraft AS3600



Draft AS3600


Current AS3600 Draft AS3600SECTION 7 METHODS OF STRUCTURAL ANALYSIS SECTION 6 METHODS OF STRUCTURAL ANALYSIS

Current AS3600

Draft AS3600

PLASTIC METHODS OF ANALYSIS essentially retained but Draft AS3600 has reworded and made itmore general.



These RECTANGULAR STRESS BLOCK formulae are wrong at the minute but it looks like there will be amodification for higher strength concretes when it is sorted out.

Current AS3600

BEAMS FOR STRENGTH AND SERVICEABILITYSECTION 8 SECTION 8 DESIGN OF BEAMS FOR STRENGTH ANDSERVICEABILITY

Draft AS3600


Current AS3600 Draft AS3600Current AS3600

BEAMS FOR STRENGTH AND SERVICEABILITYSECTION 8 SECTION 8 DESIGN OF BEAMS FOR STRENGTH ANDSERVICEABILITY

Draft AS3600


Current AS3600 Draft AS3600BEAMS FOR STRENGTH AND SERVICEABILITYSECTION 8 SECTION 8 DESIGN OF BEAMS FOR STRENGTH AND

SERVICEABILITYDraft AS3600

New Clause in Shear SectionDraft AS3600



SERVICEABILITYCurrent AS3600

Draft AS3600



SERVICEABILITY

Draft AS3600




Draft AS3600




Draft AS3600

LONGITUDINAL SHEAR essentially unchanged although Draft AS3600 is substantially reworded.DEFLECTION OF BEAMS essentially unchanged except Draft AS3600 has a revised formula for maximuminduced shrinkage stress.CRACK CONTROL OF BEAMS essentially unchanged except Draft AS3600 is slightly reworded andnow includes a Table of allowable stresses for prestressed concrete (see below).

New Table for CRACK CONTROL OF BEAMS



Current AS3600 DESIGN OF SLABS essentially unchanged except Draft AS3600 has some rewording, there are somemodifications to deflection multipliers, and the is a Table of allowable reinforcement cracking stressesfor prestress, similar to the Beam section.

SECTION 9 DESIGN OF SLABS FOR STRENGTH ANDSERVICEABILITY

SECTION 9 DESIGN OF SLABS FOR STRENGTH ANDSERVICEABILITY


Current AS3600 Draft AS3600SECTION 10 DESIGN OF COLUMNS FOR STRENGTH AND

SERVICEABILITYSECTION 10 DESIGN OF COLUMNS FOR STRENGTH AND


Draft AS3600




SERVICEABILITY

Draft AS3600




SERVICEABILITY

Current AS3600




SERVICEABILITY

Draft AS3600




SERVICEABILITY

Draft AS3600 Restraint of longitudinal reinforcement then follows very similarly to the Current AS3600, with the following Table


Current AS3600 Draft AS3600SECTION 11 DESIGN OF WALLS SECTION 11 DESIGN OF WALLS

Current AS3600DESIGN OF WALLS essentially unchanged although Draft AS3600 is substantially reworded.


Current AS3600 Draft AS3600SECTION 12 DESIGN OF NON-FLEXURAL MEMBERS, END

ZONES AND BEARING SURFACESSECTION 12 DESIGN OF NON-FLEXURAL MEMBERS, END

ZONES AND BEARING SURFACES


Current AS3600



Draft AS3600

SECTION 12 DESIGN OF NON-FLEXURAL MEMBERS, ENDZONES AND BEARING SURFACES

SECTION 12 DESIGN OF NON-FLEXURAL MEMBERS, ENDZONES AND BEARING SURFACES


Current AS3600

review of the proposed revisions to as3600, concrete...

Documents