Use of PBridge for analysis and design of single span prestressed concrete bridge subjected to wind and thermal loads

The research introduced "PBridge," a computer program designed for the analysis and design of single span prestressed concrete bridges. These analyses and design were modeled based on the design procedures of Eurocode 1 2003 Part 2, EN 1991 Part 1-4 and Part 1-5. The bridge model is single span design with a main span of 25m length and two side spans of 7.2m carriageway of the proposed bridge consist in each direction of two notional traffic lanes of 3m each. It is expected to span a fresh water river such as River Niger in Onitsha located at Anambra State of Nigeria. The Total initial prestress force of 15330kN, Total prestress force of 21000kN that required 72 Number of strands for the single span prestressed bridge was obtained for both manual and PBridge results. The satisfied prestressed strand of Y1820S7G - 15.2mm diameter, 7 wire drawn strands was adequate for the single span. To further validate the authenticity of the obtained results, the Bending Moment and Share Force results for both the STAAD Pro and PBridge were compared in Table 4.17 for Single span. The percentage difference at 2.5 metre from the end support was 0.0048 for the moment of the single span and that of continuous span was 0.0044 at a distance of 5m from the end support. For Share Force, it was 0.075 for Single span at 2.5m. These imply that the developed programme can reliably be used for analysis and design of prestressed concrete bridge.