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Appl. Sci. 2016, 6(8), 231; doi:10.3390/app6080231

Structural Behavior of a Long-Span Partially Earth-Anchored Cable-Stayed Bridge during Installation of a Key Segment by Thermal Prestressing

1
School of Civil and Environmental Engineering, Yonsei University, 50 Yonsei-ro Seodaemun-gu, Seoul 03722, Korea
2
Department of Safety Engineering, Chungbuk National University, Chungdae-ro 1, Seowon-Gu, Cheongju, Chungbuk 28644, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Lacidogna
Received: 4 July 2016 / Revised: 1 August 2016 / Accepted: 10 August 2016 / Published: 17 August 2016

Abstract

This study investigated structural behavior of long-span partially earth-anchored cable-stayed bridges with a main span length of 810 m that use a new key segment closing method based on a thermal prestressing technique. A detailed construction sequence analysis matched with the free cantilever method (FCM) was performed using a three-dimensional finite element (FE) model of a partially earth-anchored cable-stayed bridge. The new method offers an effective way of connecting key segments by avoiding large movements resulting from the removal of the longitudinal restraint owing to the asymmetry of axial forces in the girders near the pylons. The new method develops new member forces through the process of heating the cantilever system before installing the key segment and cooling the system continuously after installing key segments. The resulting forces developed by the thermal process enhance the structural behavior of partially earth-anchored cable-stayed bridges owing to decreased axial forces in the girders. View Full-Text
Keywords: structural behavior; partially earth-anchored cable-stayed bridge; key segment; thermal prestressing; FCM structural behavior; partially earth-anchored cable-stayed bridge; key segment; thermal prestressing; FCM
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kim, S.-H.; Won, J.-H. Structural Behavior of a Long-Span Partially Earth-Anchored Cable-Stayed Bridge during Installation of a Key Segment by Thermal Prestressing. Appl. Sci. 2016, 6, 231.

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