Effects of thermal expansion and support restraints on performance of composite floors in fire

  1. (PDF, 368 KB)
DOIResolve DOI: http://doi.org/10.1061/41171(401)37
AuthorSearch for: ; Search for:
ConferenceThe Structures Congress: 14 April 2011, Las Vegas, Nevada
Pages112; # of pages: 12
SubjectComposite floors, World Trade Centre, fire resistance, thermal expansion, support restraint, numerical modeling; Floors
AbstractThis paper presents results of a numerical study on the effects of thermal expansion and support restraint conditions on the performance of composite floors in fire. Previously, two full-scale composite floor specimens were tested to investigate factors, such as the supports restraint conditions, that affected the failure of the World Trade Center buildings? floors. Although higher fire resistance was expected for the restrained floors, the test results showed higher fire resistance rating for the unrestrained floor specimen. The purpose of this research was to understand the rationale behind these results numerically. The structural analysis software SAFIR was employed to evaluate the response of the composite floor specimens in fire, such as strain and stress distributions and floor deflection. The results show that the concrete spalling during the first hour of the test for the restrained specimen would have been due to concrete compression failure caused by the restraint condition and thermal expansion.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number53539
NPARC number20374205
Export citationExport as RIS
Report a correctionReport a correction
Record identifier55e25633-2103-4d82-aafd-9b108bcbaf9d
Record created2012-07-23
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)