Fire resistance of bi-directionally prestressed concrete under extreme fire loading

Ji Hun Choi, Dal Hun Yang, Seung Jai Choi, Seong Tae Yi, Jang Ho Jay Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Infrastructures such as prestressed concrete containment vessels (PCCVs) and liquid gas storage tanks are constructed as bi-directional prestressed concrete (PSC) structures to ensure outstanding leak-tight storage and shielding performance. However, PSC structures exhibit severe vulnerability to higherature fire due to the high-strength concrete used and the application of prestressing (PS) stresses to increase the strength of the structures. The PCCV of a 1400 MW advanced power reactor was selected as the target for study. A scaled-down model of the PCCV outer wall was fabricated and tested to determine its resistance to a standard fire-loading scenario. Furthermore, different PS forces were applied to the specimens to evaluate the effect of concrete confinement on the fire resistance. Test data of temperature distribution, PS force loss and residual strength capacity were obtained. The experimental data were used for calibration of a commercial finite-element simulation program (Midas FEA) for structural fire analysis of real-scale concrete structure and infrastructure. The simulation and test results showed significant similarity and the result trends were accurate.

Original languageEnglish
Pages (from-to)749-764
Number of pages16
JournalProceedings of the Institution of Civil Engineers: Structures and Buildings
Volume174
Issue number9
DOIs
Publication statusPublished - 2021 Sep 1

Bibliographical note

Funding Information:
This work was supported by National Research Foundation of Korea grants (2016R1A2B3009444 and 2017M2A8A4056624) funded by the Ministry of Science and ICT of the Korean government.

Publisher Copyright:
© 2021 ICE Publishing: All rights reserved.

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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