Danbro • Selected Data For Maps • Prioritizing / Ranking

Arne HenriksenNVF Annual Bridge Conference 2015

New Digital MapsPurpose

Administration will be less expensive and easier (80%)

Better access to data (Online)

New data available for administrator, police and road user

Bridge span will be compared with the actual truck load on the span

Time Schedule

• Maps will be available at the end of this year

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Overview of bridges – road clearanceFavrskov Municipality

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Municipality limits under• Rail way bridges• Stats road bridgesRequire all bridges in one system

x

x

x

Clearance possibilities for a 4,00 m high truck

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Overview of bridges – carrying capacityFavrskov Municipality

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Span and load capacity

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Load Limits (old map)Do not compare the load from the actual transport with the span width of the actual bridge

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Overview vehicle classificationWEB number

Diagram, Truck load,

various span widths

Data for one specific truck/load

(one WEB number)

Combine Danbro data with vehicle

Classification system

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Map passage limits by using a web number

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More structures on one location

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If double icons the color for the bridge with lowest limits is shown first

Road Authorities / Bridge Administrators• Municipalities

• Railways (are responsible for many road bridges in Denmark)

• Road Directorate

How to get information on the map

• Structures have to be registered in Danbro

• Clearance, span width and load capacity must be updated

as soon as changes takes place.

Responsibility

• All info approved and controlled by the

• Road Administrator (Clearance)

• Bridge Administrator (Load capacity)

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Prioritizing

Repair Projects

Prioritizing repair projects

• Existing method

a) Net present value

b) Evaluation

• Load capacity of bridge deck

• Load capacity of edge beam

• Defect waterproofing layer

• Chloride influence

• ASR influence

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Prioritizing existing method• Special investigation form – deterioration rate

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Load test to evaluate deck capacity

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Load test to evaluate deck capacity

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Capacity of edge beams

• Load tests as an alternative to new calculation

• None destructive test, easy to execute and repeat

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Test of edge beam / railing

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Defect waterproofing membrane

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Chloride evaluation• 100% increase of CL contact

• Repair need after few decades

• Uniform way to describe

• Results

• Estimate repair need and year

Bridge with and without isolating membrane

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Service life definitions

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ASR evaluation

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ASR cracks

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ASR special inspection

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ASR indication

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ASR indication

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New Considerations• Let the elements deteriorate and change it (20 years later)

• Use better methods to minimize road user costs

• Better guidelines how to report and describe repair need

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New considerations -New strategies for repair projects• Consultants often dramatizes deterioration rate

• Use DanbroPrincipal inspections and special inspections inclusive photos may be traced long time back

• Take photos and describe critical damage better

• Nothing to obtain by repair now, means it is better to delay

• Take a critical look at estimated repair and future repair costs before a special inspection is accepted.

• High variation from consultants to consultant in estimating consequences from: ASR and Chloride impact

• After our latest findings we need to update our common specifications to evaluate these two areas

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Thank You

Arne Henriksen