A verification of simplified analysis method for thermal prestressing in continuous composite bridge

Sang Hyo Kim, Jun Hwan Kim, Chi Young Jung, Jin Hee Ahn

Research output: Contribution to journalArticle

Abstract

The use of thermal-Prestressing method (TPSM) prevents the occurrence of tensile transverse crack in concrete decks located in negative bending moment regions of continuous composite bridges. An accurate representation of the structural response can be obtained by means of refined analyses using three-dimensional finite element models to carry out both heat transfer and thermo-Elastic calculations. So, a simplified approach was proposed for easily using the TPSM effect in design to reduce the amount of computational work of the refined analysis, but its application to real structure was not confirmed. Therefore, in this study, the verification of a simplified analysis approach has been performed to explain TPSM effects in the analysis of continuous composite bridges. For this purpose, experimental results on 2-Span thermal prestressed continuous composite bridge specimens were compared with simplified analysis and refined analysis results as well as analytical approach on 2-Span and 3-span continuous composite bridges. From the verification results, the proposed simplified TPSM analysis methodology shows the good predictions of the thermal prestressing effect to apply design of TPSM applied continuous composite bridges.

Original languageEnglish
Pages (from-to)427-443
Number of pages17
JournalInternational Journal of Steel Structures
Volume11
Issue number4
DOIs
Publication statusPublished - 2011 Dec 1

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Composite bridges
Prestressing
Bending moments
Hot Temperature
Concretes
Heat transfer
Cracks

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

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title = "A verification of simplified analysis method for thermal prestressing in continuous composite bridge",
abstract = "The use of thermal-Prestressing method (TPSM) prevents the occurrence of tensile transverse crack in concrete decks located in negative bending moment regions of continuous composite bridges. An accurate representation of the structural response can be obtained by means of refined analyses using three-dimensional finite element models to carry out both heat transfer and thermo-Elastic calculations. So, a simplified approach was proposed for easily using the TPSM effect in design to reduce the amount of computational work of the refined analysis, but its application to real structure was not confirmed. Therefore, in this study, the verification of a simplified analysis approach has been performed to explain TPSM effects in the analysis of continuous composite bridges. For this purpose, experimental results on 2-Span thermal prestressed continuous composite bridge specimens were compared with simplified analysis and refined analysis results as well as analytical approach on 2-Span and 3-span continuous composite bridges. From the verification results, the proposed simplified TPSM analysis methodology shows the good predictions of the thermal prestressing effect to apply design of TPSM applied continuous composite bridges.",
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A verification of simplified analysis method for thermal prestressing in continuous composite bridge. / Kim, Sang Hyo; Kim, Jun Hwan; Jung, Chi Young; Ahn, Jin Hee.

In: International Journal of Steel Structures, Vol. 11, No. 4, 01.12.2011, p. 427-443.

Research output: Contribution to journalArticle

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