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Concrete: Future direction in

Transport and Main Roads

Ross Pritchard | Department of Transport and Main Roads

Concrete Institute Seminar, 17 May 2016

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Our values, our diversity

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Agenda

1. Industry feedback

2. The Department of Transport and Main Roads (TMR)

“Design Criteria for Bridges and Other Structures”

3. Forthcoming AS 5100 Bridge Code Update

4. Specifications

5. Building Information Modelling

6. Conclusion.

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Industry consultation

1. Develop common / shared understanding of challenges

facing Transport and Main Roads (TMR) when building

infrastructure

2. The department’s objective to provide fit-for-purpose,

value for money outcomes

3. Risk balance – the department and industry

4. Performance standard versus prescriptive standard

5. Variation climate, geology and traffic volumes

6. Engage new developments in technology.

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Design Criteria for Bridges and

Other Structures 1. Industry forum 2015

2. Work group selected for consultation

3. Workshop and comments in drafts has resulted in 100s

of comments

4. Some clauses extensive refinements

5. Publish by June 2016.

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Design criteria amendments

• Design traffic loads for busways and light rail

• Disability access for public transport at stations

• Development applications

• Tunnel design – linings, anchors

• Protection to bridge piers for vehicle impact – new and

existing bridges

• Raked piles

• Concrete arch design – responsibility of arch designer

and footing designer, work method statement for

construction.

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Design Criteria outcomes

1. More clarity

2. Better shared understanding

3. More balanced document identifying a broader range of

cases applicable to the department

4. Better prescriptive versus performance criteria.

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AS 5100 Bridge Code update

• Standards Australia managing update

• Commenced late 2010

• Expect to publish late 2016

• Approximately 2,500 pages

• Massive project, enormous engagement by industry and

Austroads members

• Member Standards Australia BD-090 Committee and

Subcommittees.

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AS 5100 changes

Part Title Changes

Part 1 General Refresh

Part 2 Loads Update especially rail

Part 3 Foundations Minor changes

Part 4 Bearings and Joints New products

Part 5 Concrete Major rewrite of some sections

Part 6 Steel Total rewrite

Part 7 Bridge Assessment Major revision

Part 8 Rehabilitation

Part 9 Timber

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AS 5100.1 General

• General upgrade including ductility

• Defined service and ultimate limit states

• Hydraulics – clarity about flood immunity and

serviceability design life

• Safety in Design

• Climate change and sustainability

• Collision loads

• Transition barrier between bridge and road.

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AS 5100.2 Loads

• Urban flooding loads included

• Air space development

• Earthquake (force method in main text, displacement in

Appendix)

• Road traffic loads barriers increased

• Light rail included

• Rail loading changes

Braking

Collision loads

Protection of abutments and piers.

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AS 5100.7 Bridge assessment

• Changes from “Rating” to “Bridge Assessment”

• Clear methodology for bridge assessment 9 (compared

to design)

• Definition of what is included in bridge assessment

• Includes cranes and Heavy Load Platforms for the first

time

• Assessment factors, as well as design factors.

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AS5100.8 Rehabilitation

• Concrete

Cathodic Protection

Fire damage

Repair, rehabilitation and strengthening

• Steel

• Timber

• Masonry

• Bearings

• Deck joints

• Barriers Culverts.

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TMR Implementation – AS 5100

• Implement on new contracts / commissions, not

retrospectively

• “Matters Requiring Resolution” to be updated

• Some alignment between new code and “Design

Criteria” but there will be change

• Update of “Design Criteria”.

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MRTS 70 Concrete

• MRTS70 based on ‘N’ and ‘S’ Class of AS 1397

• Risk based methodology considering geology and

environment

• Management of Alkali Aggregate Reactivity

• A process to manage new and innovative concrete

products

• Reality check to ensure we consider all concrete

applications used by TMR to avoid unintended

consequences

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Proposed MRTS 70

MRTS70 – In Scope

Product AS1397 Class

Quarry Registrat

ion

Flyash/ Supplementary Cementitious

Additional

Curing

Increased Test

Frequency

All Prestressed

All steam cured

100 year design life

S Required Required Yes Increased

50 year (or less) design life

S Required Required Yes AS 1379 (project)

Small precast concrete stock items (your feedback being sought)

N Optional Optional No AS 1379

Non-Structural N Optional Optional No AS 1379

MRTS70 – Out of scope

Steel-reinforced concrete pipes

Fibre reinforced pipes

Concrete pavements

Extruded concrete barriers

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Building Information Modelling (BIM)

• Trialled on Angellala Creek

• BIM Design, Construction, Asset Management

• Progressive implementation

• Effectiveness in design

• Strategy of construction data

• Construction data asset management

• 21st Century.

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2D drawing

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3D technology overlayed on aerial photo

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3D by product type

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3D visualization

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Construction data

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Conclusion

• Transport and Main Roads are keen to engage with

industry

• The department is incorporating changes to AS 5100

• MRTS70 is being updated

• New technology, BIM, being adoptive.

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Thank you