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- W843353008 abstract "A half-scale model of a precast, post-tensioned, flat-slab bridge system was built and tested under service loading in the Structures Laboratory at the University of Florida. The bridge system has the potential to replace most low, short-span bridges such as those that traverse wetlands and relatively shallow waters. The model was based on an existing multi-span bridge system that has been constructed over the Albemarle Sound south of Edenton, North Carolina. The half-scale model was evaluated for transfer (dead load plus prestress), maximum negative moment, and maximum positive moment load cases. Three lanes of modified standard AASHTO HS20-44 trucks were used for the model live load and were positioned to produce the maximum moments. Analytical models were developed using SAP90, a microcomputer finite element analysis program. First, a prototype structure was analyzed and the results were verified using conventional analytical methods. Next, an analytical model of the half-scale bridge was developed and the results compared to AASHTO Specifications and to experimental results. Construction and erection of the model bridge were accomplished without any major problems. The segments were strong enough to be easily transported and post-tensioned without damage. The model bridge was loaded up to full service load (17.5% above service load for maximum negative moment) and remained in the linear elastic response range throughout its loading history. No cracking developed and the strain gauge data indicated that the bridge remained in compression for all load cases. Comparisons between the analytical and physical models show a very good correlation of results. Based on a comparison between the analytical results and AASHTO Specifications the bridge system satisfies AASHTO requirements. With the apparent cost savings, short erection time, multi-span continuity, and minimal environmental impact of this system it should certainly be considered as a viable alternative to the AASHTO girder system for this application." @default.
- W843353008 created "2016-06-24" @default.
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- W843353008 date "1991-06-01" @default.
- W843353008 modified "2023-09-27" @default.
- W843353008 title "ANALYTICAL AND EXPERIMENTAL EVALUATION OF A PRECAST, POST-TENSIONED, SEGMENTAL FLAT SLAB BRIDGE SYSTEM FOR SERVICE LOADS. FINAL REPORT" @default.
- W843353008 hasPublicationYear "1991" @default.
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