Experimental study on the dynamic properties of rigid polyurethane foam in stress-controlled cyclic uniaxial tests

被引:24
作者
Koyama, Atsushi [1 ]
Suetsugu, Daisuke [1 ]
Fukubayashi, Yoshinori [1 ]
Mitabe, Hitoshi [2 ]
机构
[1] Univ Miyazaki, Fac Engn, 1-1 Gakuenkibanadai Nishi, Miyazaki 8892192, Japan
[2] INOAC Housing & Construct Mat Co Ltd, 4-9-27 Taiho Atsuta, Nagoya, Aichi 4560062, Japan
关键词
Rigid polyurethane foam; Lightweight embankment; Cyclic uniaxial test; Dynamic properties; EPS GEOFOAM; MECHANICAL-PROPERTIES; BEHAVIOR; MICROSTRUCTURE; EARTHQUAKE; PARAMETERS; DESIGN;
D O I
10.1016/j.conbuildmat.2022.126377
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Frequent major earthquakes in Japan necessitate earthquake-resistant infrastructure. The dynamic deformation characteristics of rigid polyurethane foam, used as a lightweight embankment material, is examined in this study. The effect of the initial static stress on the shear modulus of single-layer samples was small, while the shear modulus of two-layer samples increased with increasing initial static stress. The damping ratio of single-layer samples converged to 4-5%, but decreased with increasing initial static stress up to 30 kPa in two-layer samples before increasing above 40 kPa. Results from cyclic uniaxial and triaxial tests were compared. The dynamic properties depended on restriction conditions and the deformation direction.
引用
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页数:12
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