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http://dx.doi.org/10.21729/ksds.2022.15.3.67

On-Site Construction Method for U-Girder with Pre-tension and Verification of Analytical Performance of Anchoring Block  

Park, Sangki (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Kim, Jaehwan (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Jung, Kyu-San (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Seo, Dong-Woo (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Park, Ki-Tae (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
Jang, Hyun-Ock (J EnC Ltd.)
Publication Information
Journal of Korean Society of Disaster and Security / v.15, no.3, 2022 , pp. 67-77 More about this Journal
Abstract
In South Korea, U-type girder development was attempted as a means to increase the length of I-type girder, but due to the large self-weight according to the post-tension method, the application of rail bridges of 30m or less is typical. There are not many examples of application of pre-tension type girder. This study does not limit the post-tension method, but applies the pre-tension method to induce a reduction in self-weight and materials used due to the reduction of the cross-section. In addition, we intend to apply the on-site pre-tensioning method using the internal reaction arm of the U-type girder. The prestressed concrete U-type girder bridge is composed of a concrete deck slab and a composite section. Compared to the PSC I-type, which is an open cross-section because the cross section is closed, structural performance such as resistance and rigidity is improved, the safety of construction is increased during the manufacturing and erection stage, and the height ratio is reduced due to the reduction of its own weight. Therefore, it is possible to secure the aesthetic scenery and economical of the bridge. As a result, it is expected that efficient construction will be possible with high-quality factory-manufactured members and cast-in-place members. In this paper, the introduction of the pre-tension method on-site and the analytical performance verification of the anchoring block for tension are included.
Keywords
PSC U-type girder; Pre-tension; On-site fabrication; Internal reaction arm; Analytical performance evaluation;
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