温湿度条件の異なる集成材はりの曲げクリープ特性 : その2 長期載荷を受けた試験体の新たな負荷の影響

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This report is a sequel of study which described the bending creep behavior of Glulam under a constant load and three different environments. Three conditions were: constant-environment (constant temperature and humidity), natural-environment, and high humidity-environment. This report describes the influence of additional loads on the bending creep after a long-term constant load. As a result of the comparison with three environments the following conclusions were found. 1) Creep deformation under constant-environment and natural-environment stabilizes when subjected to a short time load. However, in the case of high humidity-environment, the creep increases rapidly. 2) The creep recovery after removal of the loads was similar in all condition except in high humidity-environment in which the deformation recover more. 3) After the creep test, the braking tests were conducted to get the maximum bending strengths. The strength and elastic modulus of the specimens which are in high humidity-environment were lower than those of other conditions. It was confirmed that long-term load has a negative influence on the mechanical properties of Glulam.
一般社団法人日本建築学会の論文
2004-03-20