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Effect of fibers on the temperature field and radial deformation behavior of self‐compacting concrete pipes under cyclic fire condition
Author(s) -
Liu Genjin,
Ding Yining,
Wang Yuehua,
Zhang Yulin
Publication year - 2021
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.202000038
Subject(s) - materials science , deformation (meteorology) , composite material , radial stress , fiber , structural engineering , engineering
In this paper, the radial deformation of fiber reinforced self‐compacting concrete (SCC) pipes under cyclic fire conditions is studied. A series of experimental study on the temperature fields and radial deformation properties of steel mesh, polypropylene fiber (PP fiber), and macro steel fiber (SF) reinforced SCC pipes subjected to fire is carried out. A novel method for measuring the deformation of pipes under high temperature has been proposed. The results indicate that both micro PP fiber and macro SF are effective in decreasing the temperature difference and reducing the radial deformation in each thermal cycle. A significant positive synergistic effect on decreasing the residual radial deformation can be achieved by combined use of macro SF and micro PP fiber. The elastic theory is used to estimate the elastic portion in the total radial deformation, and the elastic radial deformation is about 22.3% of the maximum radial deformation in the first thermal cycle. Based on the elastic calculation and observed experimental results, a simplified method for estimating the maximum radial deformation in the first thermal cycle is proposed.