A Method for Optimizing Prestressed Tendon Alignment of Simply Supported Steel Box Girder
A technology of prestressed tendons and steel box girders, applied in bridges, bridge materials, bridge construction, etc., can solve problems such as instability, structural cracking, bridge diseases, etc.
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[0051] Embodiment 1: as figure 2 , Figure 5 As shown, the geometric parameters and material parameters of the steel box girder are: t 1 = t 2 = t 3 = 3 mm; t 4 =4mm; b=0.25m; αb=0.25m; H=0.4m; L=5m; E=2.01×10 5 Mpa; G=7.9×10 4 Mpa, and the prestressing force of each prestressing tendon is 50KN, where E 1 ;F 1 ;G 1 and E 2 ;F 2 ;G 2 are stress measurement points or calculation points, respectively. Finally, according to the applied prestressing force and different reinforcement methods, different pre-camber and different flange stress distribution forms can be obtained, and the optimal prestressed tendon layout line can be obtained accordingly.
[0052]The main purpose of the arrangement of prestressed tendons is to make the bridge structure obtain proper pre-camber and pre-stress, so that the structure has good mechanical properties. The steel box girder is a thin-walled structure with unique mechanical properties. effect, the distribution of the normal stress o...
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