United States Department of Transportation
i
Extending Use of Simple for Dead Load and Continuous for Live Load (SDCL) Steel Bridge System to Seismic Areas
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2016-12-01
[PDF-13.57 MB]
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Edition:Final Report
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Abstract:The steel bridge system referred to as Simple for Dead load and Continuous for Live load (SDCL) has gained popularity in non-seismic areas of the country. The main objective of this research was to extend the application of SDCL to seismic areas. This project was Phase I of an envisioned effort that culminated in the development of a set of details and associated design provisions to develop a version of the SDCL steel bridge system, suitable for the seismic application. Phase II of this project is a scale model component test. A complete bridge with all the components will be subjected to a shake table test in Phase III. In this research, an integral SDCL bridge system was considered for further investigation. The structural behavior and force resistance mechanism of the proposed seismic detail considered through analytical study to find the sequence of failure modes. Nonlinear time history analysis indicated that there is a high probability that bottom flange sustains tension forces under seismic events. Finite element results showed that continuity of the bottom flange increased ductility and capacity of the system. When the bottom flange was not continuous, tie bars helped the system increase the ultimate moment capacity. Under longitudinal loading, dowel bars were found to be the most critical elements of the system.
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Content Notes:ABC-UTC Project: Extending Application of SDCL to ABC (Phase I – Conceptual and Analytical)
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