Presenters: Loai El-Gazairly, PhD, PE – Associate at Whitman, Requardt & Associates
Rex L Pearce, PE – District Bridge Engineer, Staunton District Bridge Section, VDOT
Topic: Interstate Delta Frames: Structural Steel Retrofit & Restoration to Essentially Infinite Fatigue Life
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The delta frame bridges that carry I-64 over the Maury River within the Virginia Department of Transportation (VDOT) Staunton District were constructed in the mid 1970s and have experienced fatigue cracking problems that caused structural deterioration and deficiency in the bridges inventory rating. Analytical investigation by researchers at Virginia Polytechnic Institute and State University (Virginia Tech) and the Virginia Transportation Research Council (VTRC) showed that the bridges could be retrofitted to achieve essentially infinite fatigue life. The bridges’ structural behavior was evaluated through a comprehensive 3-D computer model and with an experimental monitoring program aimed at correlating the actual structural response with that of the analytical model. A comprehensive structural retrofit was designed and rehabilitation is currently underway.
LOAI F. EL-GAZAIRLY, PhD, PE
Loai El-Gazairly has more than 35 years of design and management experience. He participated in the design and construction of landmark bridge projects both nationally and internationally, such as Route 895 in VA, the John James Audubon Bridge in, LA, the Indian River Inlet Bridge in DE and others. Loai holds Bachelor and Master degrees in Civil Engineering from Alexandria University, Egypt as well as a Doctorate degree in structural engineering from Georgia Institute of Technology in Atlanta. He is a registered Professional Engineer in States of VA, GA, FL, SC, NJ, PA and OH.
REX L. PEARCE, PE
Since 2011 Mr. Pearce has held the position of Staunton District Bridge Engineer for the Virginia Department of Transportation. He presents twenty-nine years of professional engineering experience managing, designing and inspecting major transportation projects involving construction, maintenance, rehabilitation, and condition evaluation of Bridges, Highways, Tunnels and Airfields. He holds a 1986 BSCE from Virginia Tech and Professional Engineering licensure in Virginia and Pennsylvania.