Steel Twin Tub Girder Knowledge Transfer
September 16, 2009
Synopsis of Tests
A full scale simply-supported 120' long twin box girder steel bridge (with slight curvature) was constructed at the Ferguson Structural Engineering Laboratory. The bridge was subject to three test set-ups to record and observe the bridge's response.
- 1. The flange of the outermost girder was severed dynamically with a shape charge while loaded with a simulated truck load.
- 2. The damaged girder was shored up and the rupture/cut was extended nearly full depth on both webs of the outermost girder. The bridge was loaded with a simulated truck load and the shoring was dynamically removed.
- 3. The damaged bridge was incrementally over loaded. Loading continued until the ultimate load was reached and the bridge eventually collapsed.
We apologize for the technical difficulties of the webinar. Below is a video segment and PDF of each presentation that can be viewed simultaneously. Questions
Presentations
IntroductionHector Garcia - FHWA
Reggie Holt - FHWA
David Hohmann - TxDOT
Fracture Critical Inspections of Twin Tub Girder Units - TxDOT's Perspective
Alan Kowalik / TxDOT
Video PDF
Full Size Twin Tub Girder Test
Dr. Karl Frank / University of Texas
Video PDF
Finite Element Modeling
Dr. Eric Williamson - University of Texas
Video PDF
Simplified Strength Models
Dr. Karl Frank - University of Texas
Video PDF
Analysis and Design Recommendations
Dr. Eric Williamson - University of Texas
Video PDF
Redundancy of Steel Twin Tub Girder Bridges: The Marquette Interchange Approach
Tony Shkurti, PhD, SE, PE - HNTB Corp
Video PDF
Steel Box Girder Case Histories on Boston's Central Artery/Tunnel Project
Keith Donington, PE - Parsons Brinckerhoff
Video PDF
Redundancy Analysis for the Green Bay, Wisconsin Flyover Structures
Bob Anderson - URS Corporation
Video PDF
Fracture Critical "Inspections"
Richard Walther - Wiss, Janney, Elstner Associates, Inc
Video PDF