Multi-stepwise thermal prestressing using a cover-plate in steel structures

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

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


This paper introduces an innovative prestressing method for steel structures utilizing a multi-stepwise thermal prestressing method (M-TPSM). The proposed prestressing method is founded on a simple concept of thermal expansion and contraction of steel. A cover-plate, a high strength steel cover-plate used as a post-tensioning member in this method, is heated by electrical heaters before it is attached to the main member. After the cover-plate is attached to the main member by using high tension bolts at several points or by welding, the electromagnetic induction heaters are removed, and the resulting contraction force of the cover-plate induces eccentric axial forces to the main member. In this study, a fundamental investigation involving analytical and experimental study is carried out to evaluate the feasibility of the M-TPSM for steel structures. Also, static loading tests were performed on the rolled beam specimens for assessment of the behavior of the steel beam prestressed with M-TPSM.

Original languageEnglish
Pages (from-to)1464-1479
Number of pages16
JournalJournal of Constructional Steel Research
Issue number7
Publication statusPublished - 2009 Jul

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Metals and Alloys


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