Lateral Distribution in Kansas DOT Steel Girder Bridge with FRP Deck - Final Report
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2005-08-01
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TRIS Online Accession Number:1011184
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Abstract:The objective of this study is to compare the lateral load distribution (lateral stiffness) characteristics of a 14-girder bridge with corrugated metal decking with asphalt wearing surfaces to the same bridge after the original deck was replaced with a Fiber Reinforced Polymer (FRP) deck (polymer concrete wearing surface). These comparisons were developed by field testing the Crawford County Bridge 031 prior to and after the deck rehabilitation. Simple dynamic allowance tests were also conducted. The bridge 031 used in this experiment is located near Pittsburg Kansas on K126. All fourteen steel girders were instrumented with strain gages at mid-span along the longitudinal centerline of each girder and running diagnostic tests on the strain gages before truck loading. These wires were all connected to the data acquisition system onboard the University of Missouri’s Civil Engineering Bridge Field Test Vehicle. Kansas DOT supplied a loaded truck for each deck test. Two types of tests were performed on the bridge systems: static and dynamic. The data was evaluated to determine when the bridge was experiencing maximum global stress. Lateral distribution of stress was computed, and a summary of maximum values has been provided. The results of the study indicated that the simple dynamic tests are not to be used for decisions or conclusions for dynamic allowance. Testing also indicated very little change in the load distribution between the original deck system and the FRP deck system.
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