Assembled skewed hollow slab bridge can improve the line shape of the road and adapt to the complex and changing urban street conditions, making the whole route smooth, thus shortening the route and bridge length and improving economic benefits. Assembled skewed bridges are more complicated due to their forces, which leads to more prominent problems in the hinged joints of inclined bridges. When lateral prestressing is applied to the two straight sides of the skewed bridge, it is difficult to achieve the effect of prestressing at the ends. Aiming at this problem, a scheme of reinforcement with transverse prestressed carbon fiber slabs is proposed, and a solid model of fabricated oblique slab bridges is established by ABAQUS finite element software. The results show that the method of transverse prestressing CFRP plate reinforcement is effective for Assembled Skew Hollow Slab Bridge.
Abstract. According to Extension project construction drawing design of Chang pugang Bridge and some related files, we built the mathematical model for calculation. Also, the internal force, stress, and deformation result of the control section has been checked by referring to the current specification, and we get the numbers of loading vehicles, loading position, and loading efficiency. By comparing the effect value under loading and the calculation value based on calculation model, the results showed that the bearing capacity, rigidity and crack width of Chang pugang Bridge meet the specifications.
Project profile
Bridge instructionsChang pugang Bridge is located in Tongcheng County, over Chang pugang River, the new bridge is built in the downstream of the old bridge with the distance of two meters. The new bridge was constructed with prestressed concrete hollow slab, there are 11 spans, the length of each span is 16.8 meters, the abutment of the bridge is columnar with bored pile, also, the stake is columnar with bored pile. The bridge is constructed with 0.75 meters of sidewalk, 7.0 meters of carriageway, 2.5 meters of central median, 7.0 meters of carriageway, 0.75 meters of sidewalk, 18.0 meters in total. The design load is Highway-secondary. The aim of the load test is to check the quality of the bridge and provide information for further maintenance management. The full view of Chang pugang Bridge is showed in Fig. 1.
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