Deck Preservation Strategies with a Bridge Management System Deck Preservation Strategies with a Bridge Management System Paul Jensen Montana Department of Transportation Email : [email protected]Paul Jensen Montana Department of Transportation Email : [email protected]
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Deck Preservation Strategies with a Bridge Management System
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Deck Preservation Strategies with a Bridge Management
System
Deck Preservation Strategies with a Bridge Management
Typical Agency Alignment of SystemsTypical Agency Alignment of Systems
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
TISTIS
Development Of A RoadmapDevelopment Of A Roadmap
Definitions
CultureOutcomes
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
Performance
Measures
Data
Collection
Models
Everyone On The Same PageEveryone On The Same Page� New Construction� Preservation Includes (Deck, Super,
Sub)� Preventive (Not Always Condition
Responsive), � Rehabilitation
Reconstruction
� New Construction� Preservation Includes (Deck, Super,
Sub)� Preventive (Not Always Condition
Responsive), � Rehabilitation
Reconstruction
Definitions
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� Reconstruction
� Reactive Maintenance (Unplanned Activities)
� Key Words: � Life Extension� Cost Effectiveness� Proactive
� Reconstruction
� Reactive Maintenance (Unplanned Activities)
� Key Words: � Life Extension� Cost Effectiveness� Proactive
Three Track NominationsThree Track Nominations
� Reactionary Maintenance (by Bridge)
� Emergency Repairs
� Limited Contract Repairs
� DOT In-house Repairs
� Preventive Maintenance (by Corridor)
Contract Deck Sealing
� Reactionary Maintenance (by Bridge)
� Emergency Repairs
� Limited Contract Repairs
� DOT In-house Repairs
� Preventive Maintenance (by Corridor)
Contract Deck Sealing
Definitions
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� Contract Deck Sealing
� Contract Surface Rehab (Mill-And-Fill)
� Rehab, Replacement (by Bridge - Capital)
� Contract Work
� Tied to State Transportation Improvement Plan (STIP)
� Contract Deck Sealing
� Contract Surface Rehab (Mill-And-Fill)
� Rehab, Replacement (by Bridge - Capital)
� Contract Work
� Tied to State Transportation Improvement Plan (STIP)
Culture Of Change Culture Of Change � Upper Management (Across All
Areas)� High Level� Performance Goals� Resource Allocation� Political Considerations
Mid Management (Infrastructure)
� Upper Management (Across All Areas)� High Level� Performance Goals� Resource Allocation� Political Considerations
Mid Management (Infrastructure)
Culture
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� Mid Management (Infrastructure)� Detail Roll-up Of Expectations� Priority Over Costs� Area Of Performance
� Technical Experts� Models� Development Of Program Levels� Area Of Performance
� Mid Management (Infrastructure)� Detail Roll-up Of Expectations� Priority Over Costs� Area Of Performance
� Technical Experts� Models� Development Of Program Levels� Area Of Performance
Basis For Measurement Development
Basis For Measurement Development
� Current Vs. Needed
� Monitor Trends
� Develop Both Short And Long Term Goals
� Current Vs. Needed
� Monitor Trends
� Develop Both Short And Long Term Goals
Performance
Measures
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
Goals
� Return On Investment
� Funding Constraints
� Higher Expectations From The Public
� Affordable Level-of-Service
Goals
� Return On Investment
� Funding Constraints
� Higher Expectations From The Public
� Affordable Level-of-Service
FHWA’s Guidance for Approval Systematic Process
FHWA’s Guidance for Approval Systematic Process
1. Define How The Needs Are Identified.
2. Outline How The Needs Are Prioritized And Programmed.
3. Define The Outcome Or Goal, Including Resources Necessary & Timeframes To Reach The Outcome/Goal.
1. Define How The Needs Are Identified.
2. Outline How The Needs Are Prioritized And Programmed.
3. Define The Outcome Or Goal, Including Resources Necessary & Timeframes To Reach The Outcome/Goal.
Performance
Measures
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
The Outcome/Goal.
4. Demonstrate That The Proposed Activity Is A Cost-effective Means Of Extending The Service Life Of A Bridge.
5. Dedicate Resources Necessary To Reach Defined Outcome/Goal.
6. Annually Track, Evaluate, And Report On Progress In Reaching Outcome/Goal And Adjust Resources Accordingly.
The Outcome/Goal.
4. Demonstrate That The Proposed Activity Is A Cost-effective Means Of Extending The Service Life Of A Bridge.
5. Dedicate Resources Necessary To Reach Defined Outcome/Goal.
6. Annually Track, Evaluate, And Report On Progress In Reaching Outcome/Goal And Adjust Resources Accordingly.
Deck Performance Measure
Deck Performance Measure
� Best Practice Is the Health Index
� Dose Not Account for Smart Flags
� Range of Values Small for Large Change in Condition
� Best Practice Is the Health Index
� Dose Not Account for Smart Flags
� Range of Values Small for Large Change in Condition
Performance
Measures
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� Calculated by Equation 4.2.1 of Pontis Technical Manual (Page 4-9)
� Calculated by Equation 4.2.1 of Pontis Technical Manual (Page 4-9)
100100**nn
Total Element Quantity Total Element Quantity **Element CostElement Cost
nnPercent Condition StatePercent Condition State**QuantityQuantityElement Element **CostCostElement Element
IndexIndexHealthHealth∑∑∑∑∑∑∑∑
∑∑∑∑∑∑∑∑========
Deck Performance MeasureMontana Modified
Deck Performance MeasureMontana Modified
� Used Core Computation
� Included Smart Flags in Calculation
� Used Grouping From NBI Translator
� Smart Flag Cost From Total Cost of
� Used Core Computation
� Included Smart Flags in Calculation
� Used Grouping From NBI Translator
� Smart Flag Cost From Total Cost of
Performance
Measures
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� Smart Flag Cost From Total Cost of Element Group (Deck, Bearings, Joints, Approach Slabs)
� Limited One Smart Flag by Span Group
� Smart Flag Cost From Total Cost of Element Group (Deck, Bearings, Joints, Approach Slabs)
� Limited One Smart Flag by Span Group
100100**ee Cost * Qty * Pct in State)Cost * Qty * Pct in State)
HImtHImt
∑∑∑∑∑∑∑∑========
((
ee Qty) Qty) **CostCost∑∑∑∑∑∑∑∑((
ss * Qty * Pct in State))* Qty * Pct in State))∑∑∑∑∑∑∑∑+ (+ (ee Qty) Qty) **CostCost∑∑∑∑∑∑∑∑((
ss* Qty))* Qty))∑∑∑∑∑∑∑∑+ (+ (
ee Qty) Qty) **CostCost∑∑∑∑∑∑∑∑((
Montana HIMontana HI
� Larger Spread of HI Values
� Gave Better Feel for Need
� Inventory Averages
� HIavg (No SF in Computation) = 90
� Larger Spread of HI Values
� Gave Better Feel for Need
� Inventory Averages
� HIavg (No SF in Computation) = 90
Performance
Measures
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� HIavg (No SF in Computation) = 90
� HIavg (SF in Computation) = 88
� Bridges With Smart Flags
� HIavg (No SF in Computation) = 83
� HIavg (SF in Computation) = 59
� HIavg (No SF in Computation) = 90
� HIavg (SF in Computation) = 88
� Bridges With Smart Flags
� HIavg (No SF in Computation) = 83
� HIavg (SF in Computation) = 59
Data CollectionData Collection
� Deterioration - From Field Observation
� NBI Inspections
� Element Inspections
� Cost Data
Contract Data
� Deterioration - From Field Observation
� NBI Inspections
� Element Inspections
� Cost Data
Contract Data
Data
Collection
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� Contract Data
� Scheduled Contract Work
� State Transportation Improvement Plan (STIP)
� Maintenance Work Records
� Contract Data
� Scheduled Contract Work
� State Transportation Improvement Plan (STIP)
� Maintenance Work Records
MDT Data CollectionMDT Data CollectionData
Collection� Collecting NBI Data Since 1980
� Collecting AASHTO CoRe Data Since 1995
� CoRe : Commonly Recognized Elements
� All Data Warehoused in Oracle
� Collecting NBI Data Since 1980
� Collecting AASHTO CoRe Data Since 1995
� CoRe : Commonly Recognized Elements
� All Data Warehoused in Oracle
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
� All Data Warehoused in Oracle Database
� Data Structure Uses AASHTOWare Pontis Schema
� Data Analysis Uses Pontis and “Home Grown” Applications
� All Data Warehoused in Oracle Database
� Data Structure Uses AASHTOWare Pontis Schema
� Data Analysis Uses Pontis and “Home Grown” Applications
Historical Review (NBI)Historical Review (NBI)� Breakdown of NBI Data
� Deck, Superstructure and Substructure
� Snapshot Past 25, 10, 5, 1 Years
� Review for Trends and Limit the Program Scope
� Breakdown of NBI Data� Deck, Superstructure and Substructure
� Snapshot Past 25, 10, 5, 1 Years
� Review for Trends and Limit the Program Scope
19801980 19951995 20002000 20042004
Worse than 5Worse than 5 1.8%1.8% 0.9%0.9% 0.8%0.8% 1.3%1.3%
DeckDeck
Data
Collection
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section
Worse than 5Worse than 5 1.8%1.8% 0.9%0.9% 0.8%0.8% 1.3%1.3%Equal to 5Equal to 5 2.9%2.9% 3.6%3.6% 4.3%4.3% 4.8%4.8%Better than 5Better than 5 95.2%95.2% 95.2%95.2% 84.1%84.1% 91.4%91.4%
Worse than 5Worse than 5 2.3%2.3% 1.6%1.6% 1.1%1.1% 0.4%0.4%Equal to 5Equal to 5 3.1%3.1% 4.3%4.3% 4.3%4.3% 6.1%6.1%Better than 5Better than 5 94.7%94.7% 94.0%94.0% 83.8%83.8% 93.5%93.5%
SuperstructureSuperstructure
Worse than 5Worse than 5 3.3%3.3% 2.6%2.6% 2.6%2.6% 1.9%1.9%Equal to 5Equal to 5 3.9%3.9% 4.5%4.5% 6.3%6.3% 3.6%3.6%Better than 5Better than 5 92.9%92.9% 92.9%92.9% 91.1%91.1% 89.5%89.5%
SubstructureSubstructure
Conclusion From NBI DataConclusion From NBI Data� Superstructure and Substructure
� Work Condition (Worse Than 5) Down Trend
� Watch Condition (5) Went up
� Do Nothing (Better Than 5) No Trend
� Factors� Removal of Short Span Timber Bridges
� Seismic Retro Fitting
� Superstructure and Substructure� Work Condition (Worse Than 5) Down Trend
� Watch Condition (5) Went up
� Do Nothing (Better Than 5) No Trend
� Factors� Removal of Short Span Timber Bridges
� Seismic Retro Fitting
Data
Collection
Montana Department Of TransportationMontana Department Of Transportation Bridge Management SectionBridge Management Section