General View Typical Cross-Section Geometry Of The Bridge
Elevation View Of The Portion Of The Eastbound Bridge
Bridge Substructure
Locations Of Accelerometers Used for (Refined) Experimental Measurements
First Stage Of Damage Two-Foot Web
Cut Centered at Girder Mid-Span
Second Stage Of Damage Six-Foot Cut From The Center Of The Web To The Bottom Flange at Girder Mid-Span
Third Stage Of Damage Six Foot Cut In The Web Plus Half of Bottom Flange Cut at Girder Mid-Span
Fourth Stage Of Damage Six-Foot Cut In The Web Plus Full Bottom Flange Cut at Girder Mid-Span
- For All Investigated Damage Scenarios of The I-40 Bridge, Detection was reliably achieved
- Distinctive Pattern Exists For The New Damage-Parameter Experimental Distributions With:
- Persistently-Monotonic Abrupt Changes With Increased Damage
- Equal Changes In Crack Sizes Producing Disproportionate Change In Damage Index
- Demonstrated Feasibility Of Scheme With Modest Demands For Input/Output Signal Measurements
- A Single Flexural Mode Processing For Each Case Proved Sufficient For Detection
Advantages Of Proposed NDE Scheme:
- Sound Theoretical Basis
- “Modest” System / Operation Requirements:
- Strain Sensors
- Rotation Sensors
- Accelerometer (Dynamic)
- Direct Approach / Distinct Pattern-Easily Recognized<\LI>