Innovative key-segment closing method using thermal prestressing technique for partially earth-anchored cable-stayed bridges

Jeong Hun Won, Kwang I.I. Cho, Ji Hyun Yoon, Sang Hyo Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper proposes an innovative key-segment closing method for partially earth-anchored cable-stayed bridges erected using free cantilever construction method, and examines its feasibility by performing a construction sequence analysis. The proposed method is based on the thermal prestressing technique, which gives an artificial heat to the girder in a cantilever state, in order to introduce the closing force required for connecting the key-segment to the adjacent segment by means of thermal expansion. The new method not only provides a feasible closing method for partially earth-anchored cable-stayed bridges, but also has a significant effect in reducing the axial force in the girders. A construction sequence analysis of an example bridge shows that the axial forces in the girders and the uplift forces at the bearings are reduced by a considerable amount due to application of the thermal prestressing method, whereas the member forces of cables and pylons are slightly changed. Therefore, it is verified from this study that the structural capacities of the girders and the bearings of the partially earth-anchored cable-stayed bridges can be effectively enhanced by application of the proposed method.

Original languageEnglish
Pages (from-to)549-564
Number of pages16
JournalAdvances in Structural Engineering
Volume11
Issue number5
DOIs
Publication statusPublished - 2008 Oct 1

Fingerprint

Cable stayed bridges
Prestressing
Beams and girders
Bearings (structural)
Earth (planet)
Thermal expansion
Cables
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

Cite this

@article{e472796602d147bca19e810a4b188515,
title = "Innovative key-segment closing method using thermal prestressing technique for partially earth-anchored cable-stayed bridges",
abstract = "This paper proposes an innovative key-segment closing method for partially earth-anchored cable-stayed bridges erected using free cantilever construction method, and examines its feasibility by performing a construction sequence analysis. The proposed method is based on the thermal prestressing technique, which gives an artificial heat to the girder in a cantilever state, in order to introduce the closing force required for connecting the key-segment to the adjacent segment by means of thermal expansion. The new method not only provides a feasible closing method for partially earth-anchored cable-stayed bridges, but also has a significant effect in reducing the axial force in the girders. A construction sequence analysis of an example bridge shows that the axial forces in the girders and the uplift forces at the bearings are reduced by a considerable amount due to application of the thermal prestressing method, whereas the member forces of cables and pylons are slightly changed. Therefore, it is verified from this study that the structural capacities of the girders and the bearings of the partially earth-anchored cable-stayed bridges can be effectively enhanced by application of the proposed method.",
author = "Won, {Jeong Hun} and Cho, {Kwang I.I.} and Yoon, {Ji Hyun} and Kim, {Sang Hyo}",
year = "2008",
month = "10",
day = "1",
doi = "10.1260/136943308786412041",
language = "English",
volume = "11",
pages = "549--564",
journal = "Advances in Structural Engineering",
issn = "1369-4332",
publisher = "Multi-Science Publishing Co. Ltd",
number = "5",

}

Innovative key-segment closing method using thermal prestressing technique for partially earth-anchored cable-stayed bridges. / Won, Jeong Hun; Cho, Kwang I.I.; Yoon, Ji Hyun; Kim, Sang Hyo.

In: Advances in Structural Engineering, Vol. 11, No. 5, 01.10.2008, p. 549-564.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Innovative key-segment closing method using thermal prestressing technique for partially earth-anchored cable-stayed bridges

AU - Won, Jeong Hun

AU - Cho, Kwang I.I.

AU - Yoon, Ji Hyun

AU - Kim, Sang Hyo

PY - 2008/10/1

Y1 - 2008/10/1

N2 - This paper proposes an innovative key-segment closing method for partially earth-anchored cable-stayed bridges erected using free cantilever construction method, and examines its feasibility by performing a construction sequence analysis. The proposed method is based on the thermal prestressing technique, which gives an artificial heat to the girder in a cantilever state, in order to introduce the closing force required for connecting the key-segment to the adjacent segment by means of thermal expansion. The new method not only provides a feasible closing method for partially earth-anchored cable-stayed bridges, but also has a significant effect in reducing the axial force in the girders. A construction sequence analysis of an example bridge shows that the axial forces in the girders and the uplift forces at the bearings are reduced by a considerable amount due to application of the thermal prestressing method, whereas the member forces of cables and pylons are slightly changed. Therefore, it is verified from this study that the structural capacities of the girders and the bearings of the partially earth-anchored cable-stayed bridges can be effectively enhanced by application of the proposed method.

AB - This paper proposes an innovative key-segment closing method for partially earth-anchored cable-stayed bridges erected using free cantilever construction method, and examines its feasibility by performing a construction sequence analysis. The proposed method is based on the thermal prestressing technique, which gives an artificial heat to the girder in a cantilever state, in order to introduce the closing force required for connecting the key-segment to the adjacent segment by means of thermal expansion. The new method not only provides a feasible closing method for partially earth-anchored cable-stayed bridges, but also has a significant effect in reducing the axial force in the girders. A construction sequence analysis of an example bridge shows that the axial forces in the girders and the uplift forces at the bearings are reduced by a considerable amount due to application of the thermal prestressing method, whereas the member forces of cables and pylons are slightly changed. Therefore, it is verified from this study that the structural capacities of the girders and the bearings of the partially earth-anchored cable-stayed bridges can be effectively enhanced by application of the proposed method.

UR - http://www.scopus.com/inward/record.url?scp=56349104032&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56349104032&partnerID=8YFLogxK

U2 - 10.1260/136943308786412041

DO - 10.1260/136943308786412041

M3 - Article

AN - SCOPUS:56349104032

VL - 11

SP - 549

EP - 564

JO - Advances in Structural Engineering

JF - Advances in Structural Engineering

SN - 1369-4332

IS - 5

ER -