rims update - bridge data guidelines for asset management of road bridges
DESCRIPTION
RIMS Forum 22 March 2012 by Simon Bush OpusTRANSCRIPT
Bridge Data Guidelines for Asset Management of Road Bridges
Simon Bush: Opus ConsultantsPiotr Omenzetter: University of Auckland
Theuns F. P. Henning: University of AucklandPeter McCarten: Opus Consultants
Our role as asset managers• How do you prove you are contributing to national strategic
outcomes?• How do you prove you are achieving value from money from
bridge management funding?• Why? Our role is to ensure the assets we manage provide for
the nations needs and therefore support the economy• How? Through the use of an advanced asset management
approach
It is important to get it right• Close to 18000 bridges nationally (circa 4500 on state
highways and 13500 on Local roads).• On average a bridge every 5km nationally and every 2.5km
on state Highways. New Zealand therefore functions on its bridges.
• Aging local bridge stock
New Zealand bridge asset management• NZGAO 2003: Limited evidence of an advanced asset
management approach
• USGAO 2008: The bridge program does not fully align with GAO’s principles… …in that the program lacks focus, performance measures. For example, the program’s statutory goals are not focused on a clearly identified federal or national interest.
• NZGAO 2010: As asset information improves over time, there is a need to ensure the information is cost-effective to collect, and is as complete and up to date as possible, and remains useful.
New Zealand benchmark survey• Areas of innovation
• Risk based inspections
• Changes to the visual inspection programme
• Areas of good practice• Compliance with standards/expectations
• Good level of inventory data
• Area for improvement• Understanding of bridge performance and strategic outcomes
• Performance data collected, but not generally stored
• Data management
• Reliance on visual inspections
• Knowledge and use of other forms of data collection
The underlying frameworkData Collection Level
Core Asset Management Advanced Asset Management
Core
Basic functionality of asset management achieved including valuations and prioritisation of annual budget
Core data may be insufficient for advanced asset management
IntermediateCore asset management may be insufficient for as long term planning cannot be undertaken
Used for network level analysis, forecasting condition/risk and investment level scenario analysis
Advanced
Core asset management may be insufficient as long-term planning and detailed analysis cannot be undertaken
Used for further analyses/ at a detailed level, such as diagnostics. Used in the development of more accurate intervention measures/costs
Outcome: criticality and risk diagram
Data collection tools available to bridge asset managers
AHB, 3.0, 20.6
NM, 3.0, 8.2SC, 2.0, 10.6
MH, 2.0, 15.6GB, 2.0, 16.6 WRB, 3.0, 17.2
MSLN, 1.0, 4.8
TSSR, 1.0, 8.8
LCNS, 1.0, 5.9SBNS, 1.0, 7.4
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Core Intermediate Advanced
Criticality Rating
Risk Rating
Risk – and criticality-diagram
Bridge data detailed in guidelineG
overnance/Policy Directives: G
overnment Strategic
Objectives
Recommended data for collection
Collection methods detailed in guideline
Data collection tools available to bridge asset managers
Strategy application: example
a) Auckland Harbour Bridge b) Newmarket Viaduct c) Small culvert on SH1 d) Small rural timber bridge
Strategy application: example
a) Auckland Harbour Bridge b) Newmarket Viaduct c) Small culvert on SH1 d) Small rural timber bridge
Performance criteriaCulvert Timber Bridge AHB Newmarket
Risk Cons. Risk Cons. Risk Cons. Risk Cons.
Structural safety 10.02
7.51
27.03
11.33
Hydraulic/geotech. safety 10.0 5.0 22.5 3.8Serviceability 5.0 1 5.0 1 12.0 2 7.5 2Functionality 15.0 2 5.0 1 18.0 2 7.5 2Aggregate: risk (RMS) / criticality (max cons.) 10.6 2 5.7 1 20.6 3 8.0 3
Data collection regime Intermediate Core Advanced Advanced
Asset management level Advanced Core Advanced Advanced
Conclusion• Asset managers have new challenges going forwards• Have to adopt new technology• Have to start to understand their asset in greater detail• They have to do this if the bridges are to last 100 years and
economically sustainable outcome is to be achieved
Questions?More Information?See NZTA website for the data collection and monitoring [email protected]