Bridge Element Inspection Guide Manual Introduction
Transcript of Bridge Element Inspection Guide Manual Introduction
Bridge Element Inspection
Guide Manual Introduction
Mike Johnson and Paul Jensen
2010 Pontis User Training
Newport Rhode Island
September 2010
Update Team Composition
• AASHTO T-18 Members
• BridgeWare Task Force members
• Federal Highway Administration
• Federal Lands
• Local Agency Representative
• AASHTO Representative
• State DOT Representatives
Significant Changes
• Four condition states for all elements.
– Follow – Good, Fair, Poor, Severe convention.
• Wearing surfaces separated from deck element.
– Deck element units changed to square feet.
• Steel protective coatings separated from steel.
• All smart flags have been incorporated into condition state language.
• New elements for timber trestle and framed/built up tower supports.
Element Types
• National Bridge Elements (NBE’s)
– Provide the minimum element set to define safety
and load capacity of bridges.
– Includes all primary structural elements.
• Decks, Slabs, Girders, Columns, Rails, Abutments etc.
– Condition state language is not editable.
– Elements intended for NBI condition assessment.
– Minimal implementation level for non-element
inspection agencies.
Element Types
• Bridge Management Elements (BME’s)
– Elements define secondary bridge components.
• Joints, wearing surfaces, protective coatings, etc.
– Provide an added level of condition assessment
for agencies utilizing bridge management
systems.
– Can be extended to capture other components
as desired by the agency.
– Can influence deterioration modeling.
Element Types
• Agency Developed Elements
– Supports agency developed elements.
– Require fours states following general definition.
– May be sub-sets of NBE’s or BME’s.
• Sub-sets of NBE’s require same condition state language.
• Can be sub-sets of BME’s.
– May be unrelated to any defined element.
– May be subject to deterioration modeling or not.
– Allows the incorporation of non-bridge assets.
Element
Presentation
Element Presentation
Existing Single Path Model
Painted Steel Girder
50 Feet
4 F
eet
Length = 50 ft
Area = 200 sq ft
Paint – Freckled Rust
Outside, Inside Good
Fatigue
Crack
Section
Loss
Element Quantity State 1 State 2 State 3 State 4 State 5
Painted Steel Girder 50 Ft 50 ft
Steel Fatigue 1 EA 1 EA
Section Loss 1 EA 1 EA
Multi-Path Example
Painted Steel Girder
50 Feet
4 F
eet
Length = 50 ft
Area = 200 sq ft
Paint – Freckled Rust
Outside, Inside Good
Fatigue
Crack
Section
Loss
Element Quantity State 1 State 2 State 3 State 4
Steel Girder 50 Ft 48 ft 1 ft 1 ft
Multi-Path Example
Painted Steel Girder
50 Feet
4 F
eet
Length = 50 ft
Area = 200 sq ft
Paint – Freckled Rust
Outside, Inside Good
Fatigue
Crack
Section
Loss
Element Quantity State 1 State 2 State 3 State 4
Steel Girder 50 ft 48 ft 1 ft 1 ft
Fatigue Flag (girder) 1 ft 1 ft
Multi-Path Example
Painted Steel Girder
50 Feet
4 F
eet
Length = 50 ft
Area = 200 sq ft
Paint – Freckled Rust
Outside, Inside Good
Fatigue
Crack
Section
Loss
Element Quantity State 1 State 2 State 3 State 4
Steel Girder 50 ft 48 ft 1 ft 1 ft
Fatigue Flag (girder) 1 ft 1 ft
Section Loss Flag (girder) 1 ft 1 ft
Multi-Path Example
Painted Steel Girder
50 Feet
4 F
eet
Length = 50 ft
Area = 200 sq ft
Paint – Freckled Rust
Outside, Inside Good
Fatigue
Crack
Section
Loss
Element Quantity State 1 State 2 State 3 State 4
Painted Steel Girder 50 Ft 48 ft 1 ft 1 ft
Fatigue Flag 1 ft 1 ft
Section Loss Flag 1 ft 1 ft
Coating System 400 sq ft 200 sq ft 196 sq ft 4 sq ft
NBE
BME
Method Comparison
Element Quantity State 1 State 2 State 3 State 4
Painted Steel Girder 50 Ft 48 ft 1 ft 1 ft
Fatigue Flag (girder) 1 ft 1 ft
Section Loss Flag (girder) 1 ft 1 ft
Coating System 400 sq ft 200 sq ft 196 sq ft 4 sq ft
Element Quantity State 1 State 2 State 3 State 4 State 5
Painted Steel Girder 50 Ft 50 ft
Steel Fatigue (global) 1 EA 1 EA
Section Loss (global) 1 EA 1 EA
Current Element
New Element
Element Inspection Examples
• Included In The Manual
– Timber Single Span
– Prestress AASHTO Girder
– Painted Steel Truss
• Examples Depict
– NBE Element List
– NBE and BME Element List
• Shows Coding Example of Common Bridge Type
Example
Element
Number
Element
Description
Unit of
Measure
Total
Quantity
Condition
State 1
Condition
State 2
Condition
State 3
Condition
State 4
31 Timber Deck Sq Ft
(sq m)
2,400 100% 0% 0% 0%
111 Timber
Girder/Beam
Feet
(meter)
780 100% 0% 0% 0%
206 Timber
Column/Pile
Extension
Each 15 100% 0% 0% 0%
216 Timber
Abutment
Feet
(meter)
120 100% 0% 0% 0%
235 Timber Pier
Cap
Feet
(meter)
120 100% 0% 0% 0%
Element
Number
Element
Description
Unit of
Measure
Total
Quantity
Condition
State 1
Condition
State 2
Condition
State 3
Condition
State 4
31 Timber Deck Sq Ft
(sq m)
2,400 100% 0% 0% 0%
111 Timber
Girder/Beam
Feet
(meter)
780 100% 0% 0% 0%
206 Timber
Column/Pile
Extension
Each 15 100% 0% 0% 0%
216 Timber
Abutment
Feet
(meter)
120 100% 0% 0% 0%
235 Timber Pier
Cap
Feet
(meter)
120 100% 0% 0% 0%
510 Wearing Surfaces
Sq Ft
(sq m)
2,400 100% 0% 0% 0%
332 Timber Bridge Railing
Feet
(meter)
120 100% 0% 0% 0%
Element Migration
• Why Migrate Existing Data– Over 10 years of Data
– Basis for Agency Program Analysis and Development
• A Lot Of Pages, Single Methodology
• Division of CoRe Language Into Structural and Other Elements
• Reduce or Add States from CoRe Guide– Three state elements into four state elements
– Five state elements into four state elements
Migration Mythology
• Match Like element groups
• Core That Have Protective Systems, Split
Into Two Elements
• Migration Works From The Worst
Condition To Best Condition
• Change in Condition Language
• Apply Existing Smart Flags As Appropriate
Division of CoRe to NBE/BME
• Structural
• Protective
• Smart Flag (Defect Flag)
• Example– Painted Steel Open Girder (CoRe)
– Steel Girder (NBE)
– Steel Protective Coating (BME)
– Smart Flag Bridge Level (CoRe)
– Smart Flag Element Level (BME)
Application Of Condition Ratings
• Apply from Worst to Best
• Match Existing Condition Language To
New Condition Language
• Apply Smart Flag as CoRe Described or all
in one state
Simple Example From Manual
Concrete Decks/Slab
Condition
State 1
No Defects
Condition
State 2
0-10%
Spall/Delam
Condition
State 3
10-25%
Spall/Delam
Condition
State 4
25-50%
Spall/Delam
Condition
State 5
More than
50%
Spall/Delam
CoRe
Elements12,26,27,38,52,53
Condition
State 1
No Defects
Condition
State 2
Spall/Delam
Condition
State 3
Spall/Delam
With
Exposed Bar
Condition
State 4
Load
Deficent
National Element
12/38
Place Amount into Condition 2
Default Max from CoRE State
Element Number CS 1 CS 2 CS 3 CS 4 CS 5
12,26,27,38,52,53 0 0 0 0 100
Element Number CS 1 CS 2 CS 3 CS 4
12,38 0 100 0 0
Existing Deck/Slab Elements
New NBE Element
Complex Example From Manual
Concrete Decks/SlabCondition
State 1
No Defects
Condition
State 2
0-10%
Defects
Condition
State 3
10-25%
Defects
Condition
State 4
25-50%
Defects
Condition
State 5
More than
50%
Defects
CoRe
Elements13,14,18,22
39,40,44,48
Condition
State 2
Cracking
Size and
Density
Fair
Condition
Condition
State 3
Cracking
Size and
Density
Limited
Effectiveness
Condition
State 4
No Longer
Effective
National Element
12,38
Concrete Deck
Place Amount into Condition 2
Default Max from CoRE State
CoRe
Smart Flag 358Cracking
CoRe
Smart Flag 359Soffet
Condition
State 1
Repaired
Condition
State 2
moderate
size or
density
Condition
State 3
moderate
size and
density
Condition
State 4
Sever size
and densityPlace 100% of element into
mapped Condition State
Place Max smart flag
percentage of the of element
into mapped Condition State
Condition
State 1
Repaired
Condition
State 2
0-2%
Distress
Condition
State 3
2 to 10%
Distress
Rust Stain
Condition
State 4
10 to 25%
Distress
Rust Stain
Condition
State 5
10 to 25%
Distress
Rust Stain
Bridge Management Element
510Wearing Surface
Bridge Management Element
Smart Flag 359Concrete Cracking
Bridge Management Element
Smart Flag 359Concrete Efflorescence
Condition
State 1
No Defects
Condition
State 2
Moderate
Cracking
Size and/or
Density
Efflorescence
moderate
without stain
Spall/Delam
Condition
State 3
Severe
Cracking
Size and
Density
Efflorescence
moderate
without stain
Spall/Delam
With
Exposed Bar
Condition
State 4
Load
Deficient
Condition
State 2
moderate
size or
density
Condition
State 3
severe size
and/or
density
Condition
State 1
No Defects
Condition
State 2
moderate
without rust
staining
Condition
State 3
Severe with
rust staining
ElementNumber
CS 1 CS 2 CS 3 CS 4 CS 5
13,14,18,2239,40,44,48
0 0 100 0 0
358(cracking)
0 0 1 ea 0 X
359 (soffit) 0 0 0 1 ea 0
Existing Deck/Slab Elements
Element Number CS 1 CS 2 CS 3 CS 4
12,38 (NBE) 25 50 25 0
358 Cracking (BME) Associated with
Element 12,38
X
359 Soffit (BME) Associated with
Element 12,38
X
510 Wearing (BME) 50 50 0 0
Element Migration
• Working to develop a “Migrator” utility that will convert CoRe Elements to new elements.
• Task Force envisions parallel database tables to store old and new elements.
• Old elements will be read only in Pontis 5.2.
• Pontis 5.2 modeling will use new elements only.
• Continue to work with FHWA, T-18 to implement new elements & develop training
Summary
• Goal is to improve the elements and have them drive decision making.
• Element changes
– Four condition states across the board.
– Decks/slabs to square units.
– Wearing surfaces and coatings as elements with square area units.
– Smart flags at element level.
– Multi-path condition states and BMS models.
Questions and Answers
Why change the elements?
• Fully capture all condition defects on the bridges.
• Provide the means for national decision making based on consistent detailed bridge condition information.
• Eliminate the need to translate and synthesize element data for the C&P report.
• Improve the deck and slab language to capture structural capacity and defects of these high maintenance items.
• Separate wearing surfaces and protective coatings out for management of these protection systems.
Questions and Answers
Will retraining of our inspectors be required?
• The new elements build on a concept that they are
familiar with, however some training will be
required.
• Many of the changes in the new elements will appeal
to the field inspectors and will be welcome
improvements.
• The consistent four state model will provide for more
standardized inspection from one element to the next.
Questions and Answers
Will the new elements work in Pontis?
• Pontis 5.2 will be able to accommodate the new
element definitions and will have the capability to
handle sub-sets and agency developed elements.
• Pontis will facilitate the conversion of older element
data for the majority of state DOT’s.
• The new element definitions will provide vastly
improved modeling and cost estimating too.
Questions and Answers
Will the element translator work with the new elements?
• The new elements are designed to be directly reported
to the NBI eliminating the need for translation.
• If the translator is required as an interim measure, the
program would need to be recalibrated.
Questions and Answers
Will the new element manual impact the sufficiency
rating?
• The new elements are not currently associated with
the sufficiency rating and will have no impact on
project eligibility or apportionment.