Long-Term Bridge Performance Program Strategic Bridge Performance Matrix

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TRB 93^rd Annual Meeting
LTBP Program Workshop – Program Briefing
Washington, DC – Thursday January 16, 2014

Presentation Outline

• Identification of high priority bridge performance topics
  
  
• Strategic matrices for high priority topics
  
  
• Description of Strategic matrix as a “roadmap” to achieve program goals
  
  
• Operational Matrix

 • High-Priority Performance Topics >>

Based on input from stakeholders and considering current resources of the program, the following key topics are addressed:

Presentation Outline

• Identification of high priority bridge performance topics
  
  
• Strategic matrices for high priority topics
  
  
• Description of Strategic matrix as a “roadmap” to achieve program goals
  
  
• Operational Matrix

 • Strategic Performance Matrix >>

What is the LTBP Strategic Performance Matrix ?

It is high level generic framework or roadmap outlining the LTBP research process that can be applied to ANY identified high priority performance topic.

It is NOT intended to provide detail on what data to collect nor how to analyze or interpret it.  This information is found in a corresponding Operational Matrix which is currently under development (but we’ll take a sneak peak at it!)

 • Strategic Performance Matrix: Untreated Bridge Decks >>

 • Strategic Performance Matrix: Concrete Bridge Deck Treatments >>

 • Strategic Performance Matrix: Matrix: Joints & Bearings >>

 • Strategic Performance Matrix: Coatings for Steel Components >>

 • Strategic Performance Matrix: Embedded or Ducted Strands or Tendons >>

Presentation Outline

• Identification of high priority bridge performance topics
  
  
• Strategic matrices for high priority topics
  
  
• Description of Strategic matrix as a “roadmap” to achieve program goals
  
  
• Operational Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

To define and improve bridge health and performance for more effective safety, mobility, stewardship and asset management through:

Standardization and enhanced inspection techniques and criteria Enhanced design, construction, preservation and operating practices from probabilistic data-driven tools

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

Untreated Decks – Questions to be answered

Practical (Providing Actionable Information)

• How should an untreated concrete deck be inspected?
  
  
• When should an untreated concrete deck be inspected?
  
  
• How should an untreated deck be preserved or replaced?
  
  
• When should an existing deck be preserved or replaced?
  
  
• How should an untreated concrete deck be designed and constructed?
  
  

Fundamental (Underpin Forecasting and Asset Management)

• How does live load influence performance?
  
  
• How do environmental factors influence performance?
  
  
• How does the design of the untreated concrete deck (e.g., cover) influence its performance?
  
  
• How do structural characteristics (e.g., flexibility) of a bridge influence performance?
  
  
• How do preservation activities influence performance?

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

Untreated Decks – Hypotheses

The observed deterioration of bridge decks is caused by the individual and combined influences of…

• Environment – Precipitation, Temperature, Proximity to the coast, Pollution, Age/deterioration
  
  
• Deck Design – Cover, Rebar type, Concrete mix, Proportioning of rebars, Use of SIP forms
  
  
• Bridge Design – Span length, Girder stiffness, Girder spacing, Angle of skew, Bridge/approach profile
  
  
• Live Load – Frequency, Axle weights & spacings, Speed
  
  
• Owner Actions – De-icing, Level of preservation, Load permitting, Construction practices

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

Untreated Decks – Solution

1. Design an appropriate experiment for addressing the practical and fundamental questions
   
   
2. Select a network of bridges (reference and clusters) as the primary population source
   
   
3. Conduct paper study (tacit/legacy data collection)
   
   
4. If the paper study proves inconclusive, conduct field data collection using the appropriate LTBP data collection protocols
   
   
5. Handle all data management through the LTBP Portal
   
   
6. Conduct data analysis
   
   
   1. Develop deterioration models
      
      
   2. Develop life-cycle cost models
      
      
7. Address the question

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

 Research Approach & Methodology: Description of Untreated Bridge Deck Matrix

Untreated Decks – Outcomes

Presentation Outline

• Identification of high priority bridge performance topics
  
  
• Strategic matrices for high priority topics
  
  
• Description of Strategic matrix as a “roadmap” to achieve program goals
  
  
• Operational Matrix

 Research Operational Matrix >>

Two Components of Operational Matrix

(There is a layer of Matrix for Each High Priority Performance Issue)

Data Collection

• Pre-Field Visit
  
  
• Field Visit

Data Analysis

• Data Reduction, processing, visualization
  
  
• Data Interpretation

An example of what this looks like in concept …..