Multi-Span Members with Unbonded Tendons: Ultimate Strength Behavior
作者: Marc Maguire William N. Collins Kedar R. Halbe Carin L. Roberts-Wollmann
刊名: Structural Journal, 2016, Vol.113 (2)
来源数据库: American Concrete Institute
关键词: spanstrengthtendons
原始语种摘要: Many researchers have proposed empirical methods to predict the strand stress increase at ultimate, relying heavily on simple span test data with little consideration for continuous members. The research team fabricated four two-span representative slab specimens. Tendon stresses were found to be conservatively predicted by three codified unbonded tendon stress prediction methods, but presented large scatter for the identically designed specimens. Following flexural failure, the measured-to-predicted strand stress increase ratio was found between 1.23 and 3.99 and observed tendon stress increases were between 42.4 and 61.1 ksi (292 and 421 MPa). The Naaman and Alkhairi method results in the most accurate prediction of tendon stress increases. Tendon stress increases were found to be...
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  • tendon 钢筋束
  • stress 应力
  • found 创立
  • predicted 预先计算的
  • prediction 预报
  • conservative 保守
  • unexpected 突然的
  • scatter 
  • fabricated 制造
  • consideration 考虑