Recently, advanced transit systems are being constructed to reduce traffic congestions in metropolitan areas. For these\nprojects, curved bridges with various curvatures are required. Many curved bridges in the past were constructed using aesthetically\nunpleasant straight beams with curved slabs or expensive curved steel box girders with curved slabs. Therefore, many recent\nstudies have been performed to develop less expensive and very safe precast prestressed concrete (PSC) curved girder. One method\nof reducing the construction cost of a PSC curved girder is to use a reusable formwork that can easily be adjusted to change the\ncurvature and length of a girder. A reusable and curvature/dimension adjustable formwork called Multi-tasking formwork is\ndeveloped for constructing efficient precast PSC curved girders. With the Multi-tasking formwork, two 40 m precast PSC box\ngirders with different curvatures were constructed to build a two-girder curved bridge for a static flexural test to evaluate its safety\nand serviceability performance. The static flexural test results showed that the initial cracking load was 1400 kN, exceeding the\ndesign cracking load of 450 kN. Also, the code allowed deflection of 50 mm occurred at a load of 1800 kN, verifying the safety\nand serviceability of the precast PSC curved bridge constructed using the multi-tasking formwork.
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