Bridge Management The need for a structured approach Andrew Sonnenberg Bridge Engineering Manager

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Bridge Management The need for a structured
approachAndrew SonnenbergBridge Engineering
Manager
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Overview

• Managing Local Government bridges using Bridge
  Management Plans
• Level 1 ,2 and 3 inspections
• Prioritising works
• Benefits of a structured approach

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Bridge Management Plans

• Key components of a Bridge Management Plan.
• Consistent with IPWEA International
  Infrastructure Management Manual.

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Bridge Management Plans
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Inventory

• Asset No. do not change once the number is
  assigned.
• Location - GPS coordinates so that the structures
  can be readily found. Especially important on
  long roads and for bridges in parkland.
• Dimensions for asset valuation and load
  assessment.
• Components for condition monitoring
• Materials timber bridges typically are less
  durable.

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Inventory

• Load rating what vehicles can run on a bridge
  and how much reserve there is. Can HML vehicles
  run, fire trucks and garbage trucks.
• Design drawings enable bridge upgrades to occur
  efficiently and load rating. May have
  geotechnical data.
• Owner indentify bridges with joint ownership or
  ownership by other authorities.
• Heritage information

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Condition assessment
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VicRoads Bridge Inspection Manual
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Condition assessment

• Level 1 inspections 6 monthly
• Inspectors shall have extensive practical
  experience in road and bridge routine maintenance
• Vandalism
• Accident, flood and fire damage
• Obvious distress
• Doesnt currently include photos
• Not currently component based.

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Condition assessment
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Condition assessment

• Level 2 inspections
• For collecting generic data
• For collecting condition data
• Photos individually named in a meaningful way
• Link defect photos to specific defects.
• Note status of repair works and changes in
  defects overtime

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Condition assessment
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Condition assessment
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Condition assessment
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Bridge Management Plans

• Record deterioration of defects over time
• Close out repair works
• Track costs

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Bridge Management Plans
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Load Rating

• Level 3 inspections
• Minimum of 5 year experience with current bridge
  design and construction experience
• Prequalified with VicRoads
• NDT
• Determine load rating
• Assess the effect of defects
• Investigate strengthening solutions

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Load Rating
The general equation to determine the rating
factor (RF) for bridges is
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Bridge Management Plans
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Historical Recording

• Record deterioration of defects over time
• Close out repair works
• Track costs
• Show that the money spent has been worthwhile.
• Estimate decline in value over time

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Bridge Management System

• Bridge Management System with access for
• Inspectors
• Asset manager
• Maintenance personnel
• Handle work flows

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Bridge Management Plans

• Determine relative risk of structures and defects
• Important that the methodology is clear defined

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Risk Assessment
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Bridge Management Plans

• Compare structure condition and risk against
  intervention criteria

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Bridge Management Plans

• Schedule maintenance and capital works based on
  risk
• Particularly important for barrier upgrades and
  strengthening works

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Benefits of structured approach

• Consistency of results overtime even with changes
  in staff at Council.
• Justify that the money being spent is spent in
  the most appropriate way.
• Obtain funding for works to ensure the
  sustainability of the infrastructure.
• Identify when works must be done or load limits
  placed.
• Clearly specify the skills required for those who
  undertake works to ensure data collected is
  accurate.