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作者:

Song, T. Y. (Song, T. Y..) | Zhang, J. C. (Zhang, J. C..) | Xiang, K. (Xiang, K..)

收录:

CPCI-S

摘要:

In recent years, concrete-filled steel tube (CFST) structures have been widely used in modern high-rise buildings. Compared with traditional circular and square CFST columns, elliptical concrete-filled steel tube (ECFST) columns show better structural performance such as higher torsion stiffness and flexural stiffness. The structural performance of ECFST columns at ambient temperature and in fire condition have been investigated by previous researchers. However, very limited research on the post-fire performance of ECFST columns has been conducted. In this paper, finite element analysis (FEA) models of ECFST stub columns were established to investigate their post-fire performance. In order to study the influence of section type on the post-fire performance of CFST stub columns, FEA models of circular and square CFST stub columns were also built to compare with the ECFST model. The temperature development in fire exposure stage, axial load versus average axial strain curves, load distribution and steel tube-core concrete interaction during the post-fire loading process were obtained and discussed.

关键词:

Concrete-filled steel tubes Elliptical hollow sections Post-fire Residual bearing capacity Stub columns

作者机构:

  • [ 1 ] [Song, T. Y.]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Zhang, J. C.]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Song, T. Y.]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, J. C.]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Xiang, K.]Minist Publ Secur, Tianjin Fire Res Inst, Tianjin 300381, Peoples R China

通讯作者信息:

  • [Song, T. Y.]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China;;[Song, T. Y.]Beijing Univ Technol, Minist Educ, Key Lab Urban Secur & Disaster Engn, Beijing 100124, Peoples R China

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来源 :

PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE ON STEEL AND ALUMINIUM STRUCTURES (ICSAS19)

年份: 2019

页码: 1459-1469

语种: 英文

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