Research
Finite Element Model for stress concentrations of a plate with 2 holes and a cut joining them.
("On Drilling Holes To Arrest Fatigue Crack Growth")
Selective Publications:
The following list of publications were authored by SEI's staff. For further information, send email to: lylai@sei-engineers.com.
"Temperature Effects on Load Ratings of RC Open-spandrel Arch Bridges", Under preparation.
"Inspection and Evaluation of Non-Composite Prestressed Concrete Adjacent Box-Beam Bridges", Presented at 2011 International Bridge Conference, Pittsburgh, PA.
"Market Street and Chestnut Street Bridge Rehabilitations", Presented at IBC 2010, Pittsburgh, PA.
"Load Ratings of a Concrete-Encased Steel 3-Hinge Arch Bridge ", Present at IABMAS2010 Conference, Philadelphia, PA, 2010.
"Fatigue Retrofit Improves Chesapeake City Bridge", presented at the Second International Conference on Fatigue and Fracture in the Infrastructure, Philadelphia, PA, 2009.
"Shear Cracks Originated from a Corrosion Induced Hole", presented at the Second International Conference on Fatigue and Fracture in the Infrastructure, Philadelphia, PA, 2009.
"Saving Our Infrastructures", presented at the 2009 ASCE Structures Congress, Austin, Texas.
"Remote Health Monitoring and Load Modeling of Cracked Fracture Critical Bridge Components", Final Report to PENNDOT, 2007.
" Fatigue Cracks in Floorbeam-to-Tie Girder Connection Angles in A Tied-Arch Bridge," Presented at the STRUCTURAL FAULTS + REPAIR-2006 Conference, Edinburgh, UK.
"Remote Health Monitoring and Load Modeling of Cracked Fracture Critical Bridge Components", Strategy Interim Report to PENNDOT, 2005.
"Load Testing On Two Bridge Superstructures", presented at ASCE Structures Congress, 2003.
"Innovational Evaluation of A Complex Steel Curved Girder Steel Bridge", Structural Engineers World Congress, Yokohama, Japan, 2002
"Fatigue Testing on A Steel Viaduct", International Conference on Bridge Maintenance, Safety and Management (IABMAS), Barcelona, Spain, 2002.
"NDT and NDE on An I-95 Viaduct", NDT Conference Proceedings, FHWA/NJDOT/NYSDOT, Atlantic City, New Jersey, 2000.
"Diagnostic Testing of A Unique Historic Bridge", ASCE Structures Congress Proceedings, 1999.
"LRFD Moment Distribution Factors for Mixed Permit and Design Live Loads", 15th International Bridge Conference Proceedings, Pittsburgh, 1998.
"Weigh-In-Motion and Smart Bridges", Smart Structures and Materials Conference, San Diego, California, 1997.
"On Drilling Holes to Arrest Fatigue Crack Growth", 15th ASCE Structures Congress Proceedings, 1997.
"Computerized Machinery Design for Bascule Bridges", 4th ASCE Congress on Computing in Civil Engineering Proceedings, 1997.
"Seismic Vulnerability of Highway Bridges Containing Pin-Hanger Connections", 4th ASCE Congress on Computing in Civil Engineering Proceedings, 1997.
"Fatigue Cracks At Stringer-to-Floorbeam Connections", 14th ASCE Structures Congress Proceedings, 1996.
"Detecting
Damage in Highway Bridges from Vehicle Induced Girder Strains",
ASCE Engineering
Mechanics Specialty Conference Proceedings, 1996.
"Seismic Analysis of Horizontally Curved Girder Bridges", 7th Canadian Conference on Earthquake Engineering Proceedings, 1995.
"Rating of An Open-Spandrel Concrete Arch Bridge by Load Testing", 13th ASCE Structures Congress Proceedings, 1995.
"Measured and Predicted Stress Histories in Bridge Girders Due to Vehicular Loading", 10th ASCE Engineering Mechanics Specialty Conference Proceedings, 1995.
"Seismic Vulnerability of Bascule Bridges", 11th International Bridge Conference Proceedings, 1994.
"Impulse
Effect on Redundancy of A Tied-Arch Bridge"
, ASCE First Congress on
Computing in Civil Engineering Proceedings, 1994.
"Strength of Pre-Post Tensioned Concrete Girder Bridges", ACI Spring Convention, Salt Lake City, Utah, 1994.
"A Program to Define and Evaluate Fracture Critical Bridge Members", ASCE 9th Structures Congress, Indianapolis, Indiana, 1991.
"Manual for Inspecting Bridges for Fatigue Damage Conditions", FHWA-PA-89-022+85-02, 1990.
"Evaluation of Bridge Vibration through Field Measurement of Strains", TRR 1223, Transportation Research Board, 1989.