Performance of prestressed concrete roofs during hurricane Andrew

Wimal Suaris, Mohammed S. Khan

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

The paper presents some examples of prestressed concrete double-Tee (DT) failures caused by Hurricane Andrew. The DT failures were mainly due to the negative moment created by uplift. In some instances a portion of the flange and the stem was torn away; in other cases the DTs collapsed altogether. The DTs were generally subjected to external as well as internal pressure when the overhead doors in these buildings collapsed. Most of the failures occurred in sections with shallower stems. The stress conditions in these DTs subject to hurricane winds are evaluated in the paper using local as well as ASCE design wind loads. In some instances the uplift was large enough for the beams to be airborne, because the anchorage provided was inadequate. Flange failures were also common where DT flanges were used as overhangs with sparse reinforcement. Also, many diaphragm shear connectors pulled out by spalling the small concrete cover provided.

Original languageEnglish (US)
Pages (from-to)16-30
Number of pages15
JournalJournal of Performance of Constructed Facilities
Volume8
Issue number1
DOIs
StatePublished - Feb 1994

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality

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