Recently, advanced transit systems are being constructed to reduce traffic congestions in metropolitan areas. For these projects, curved bridges with various curvatures are required. Many curved bridges in the past were constructed using aesthetically unpleasant straight beams with curved slabs or expensive curved steel box girders with curved slabs. Therefore, many recent studies have been performed to develop less expensive and very safe precast prestressed concrete (PSC) curved girder. One method of reducing the construction cost of a PSC curved girder is to use a reusable formwork that can easily be adjusted to change the curvature and length of a girder. A reusable and curvature/dimension adjustable formwork called Multi-tasking formwork is developed for constructing efficient precast PSC curved girders. With the Multi-tasking formwork, two 40 m precast PSC box girders with different curvatures were constructed to build a two-girder curved bridge for a static flexural test to evaluate its safety and serviceability performance. The static flexural test results showed that the initial cracking load was 1400 kN, exceeding the design cracking load of 450 kN. Also, the code allowed deflection of 50 mm occurred at a load of 1800 kN, verifying the safety and serviceability of the precast PSC curved bridge constructed using the multi-tasking formwork.
|Number of pages||17|
|Journal||International Journal of Concrete Structures and Materials|
|Publication status||Published - 2016 Sep 1|
Bibliographical noteFunding Information:
This work was partially supported by a grant from the National Research Foundation of Korea (NRF) funded by the Korean government (MSIP) (No. 2011-0030040). This work was also partially supported by the R&D Policy Infrastructure Technology Commercialization Project titled “Commercialization Research of Precast curved PSC Beam Constructed using Smart Mold System” by the Ministry of Land, Transport, and Maritime Affairs of the Korean government. The authors wish to express their gratitude for this financial support. The opinions, findings, and conclusions of the paper are those of the authors and do not necessarily reflect the views of the sponsors.
© 2016, The Author(s).
All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Ocean Engineering