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Strengthening Of Continuous-Span Composite Bridges Using Post-Tensioning And Superimposed Trusses , Hisham Ahmed El-Arabaty
Strengthening Of Continuous-Span Composite Bridges Using Post-Tensioning And Superimposed Trusses , Hisham Ahmed El-Arabaty
Hisham Ahmed
The need for upgrading understrength bridges in the United States has been well documented in the literature. In this thesis, two methods of strengthening are presented: post-tensioning of the positive moment regions of the bridge stringers and the addition of superimposed trusses at the piers. The use of these two systems is an efficient method of reducing flexural overstresses in undercapacity bridges. The objective of the research described in this thesis was to develop a design methodology to assist bridge engineers with designing a strengthening system to obtain the desired stress reductions. In addition, one such strengthening system was designed …
Thermal And Fatigue Testing Of Fiber Reinforced Polymer Tie Connectors Used In Concrete Sandwich Walls , Anthony William Post
Thermal And Fatigue Testing Of Fiber Reinforced Polymer Tie Connectors Used In Concrete Sandwich Walls , Anthony William Post
Anthony Williams
The purpose of this research program was to determine the strength, strain, fatigue, temperature, and other corresponding behavioral characteristics of concrete sandwich wall panels containing the new Delta TieRTM fiber reinforced polymer (FRP) tie connector produced by Dayton/Richmond, a brand of Dayton Superior. The scope of this program included a matrix of three full-scale 40'-0'' wall panels subjected to a 100°F temperature differential, and a matrix of six elemental specimens, three with the ties oriented in the strong direction (parallel tie orientation) and three with the ties oriented in the weak direction (perpendicular tie orientation), subjected to cyclic load tests …