南京工业大学学报（自然科学版）2016，Vol.38Issue(5)：87-93,7.DOI:10.3969/j.issn.1671-7627.2016.05.014
意杨旋切板胶合木柱的蠕变性能
Creep properties of poplar laminated veneer lumber column
摘要
Abstract
This paper studies the creep properties of full-scale poplar laminated veneer lumber column under the long term loading.The test specimens were divided into three groups,and all specimens were of the same size,which was 1 50 mm wide,1 50 mm high,and 2400 mm long.The axial compressive load of each group was determined by the previous column axial compression test.During the experimental process,the environmental changes were recorded by the temperature and humidity recorders;the deformation of the middle part of the specimen was measured by the displacement sensor;the viscoelastic mechanics theory was used to establish the creep constitutive equations;the coefficients of the equation were fitted by Origin software combined with the test data.The experiment proved that the poplar laminated veneer lumber creep deformation was composed of elastic,viscous,and viscoelastic deformations.The influence of humidity and temperature on creep deformation was much greater.Based on the Burger model, the three parameter model,and the empirical model,the constitutive equation of creep was established.The Burger model and the three parameter model could fit the test curve well,while the constitutive equation established by the three parameter model could be better applied in practical engineering.关键词
意杨旋切板胶合木/蠕变/黏弹性/本构方程Key words
poplar laminated veneer lumber/creep/viscoelasticity/constitutive equations分类
建筑与水利引用本文复制引用
刘雁,盛向前,缪晓春,宋亚磊,丁佩蓉..意杨旋切板胶合木柱的蠕变性能[J].南京工业大学学报（自然科学版）,2016,38(5):87-93,7.基金项目
住建部2015年科学技术项目 （）
