Considering the thermodynamic properties of materials at different temperatures, the method of thermal-elastic-plastic finite element analysis and riks method are used to study the collapse mode and residual ultimate strength of stiffened panel exposed to fire. The residual ultimate strength of the uniaxial compression at different heating-up time is also calculated. The numerical results show that：the whole structure heats up faster and fails earlier when stiffener heated, which is more dangerous. The collapse mode is beam-column type collapse when plate heated. And the collapse mode is a combine of overall collapse mode and local buckling mode of stiffener web when stiffener heated. The ultimate strength of plate heated stiffened panel reduces to 13% of that in normal temperature and the ultimate strength of stiffener heated stiffened panel reduces to 5% when the heating time reaches 140s.
ZHANG Liming,LI Yuanyuan,XUE Hongxiang,TANG Wenyong
. The Analysis of Ultimate Strength of Stiffened Panels Exposed to
Fire Under Temperature Increase Condition[J]. Journal of Shanghai Jiaotong University, 2019
, 53(12)
: 1420
-1427
.
DOI: 10.16183/j.cnki.jsjtu.2019.12.004
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