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《Journal of Forestry Engineering》 2018-01
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Experiments of partial compression bearing capacity perpendicular to grain of bamboo scrimber

ZHOU Junw en;HUANG Dongsheng;SHEN Yurong;College of Civil Engineering,Nanjing Forestry University;School of Civil and Architecture Engineering,Changzhou Institute of Technology;  
To investigate the mechanical performance of partial compression perpendicular to grain of bamboo scrimber,and five groups of bamboo scrimber specimens with a total number of 40 were used for the compression tests,and each specimen group has same dimension in direct compression zone. The compression load was applied to the specimen with a velocity of 0. 5 mm/min until failure,and the failure mode and ultimate bearing capacity under the different loads and load-displacement curves of each specimen were reported. The results showed that the ultimate bearing capacity of bamboo scrimber under partial compression perpendicular to grain was stable,the variable coefficients of each specimen group were all lower than 0. 1,and the different loading condition had significant impact on the ultimate bearing capacity and mode. Moreover,the more the quantity of confining pressure face,the higher the bearing capacity can be obtained,and confining pressure also raised the compression stiffness under partial compression loading. Based on the existed calculation equation for bearing capacity of partial compression perpendicular to the grain of timber and the test results,and considered the high hardness of the bamboo scrimber,the stress dispersion length perpendicular to grain and parallel to grain were set to 20 mm,the calculation equation of partial compression perpendicular to grain of the bamboo scrimber was developed. Furthermore,and the calculated results according to advised calculation equation were all lower than the average values of the experimental ultimate bearing capacities of each specimen group,which verified that the calculation equation developed in this study was practicable.
【Fund】: 国家自然科学基金(51378263 51578291);; 建设部科技项目(2014-K2-014);; 江苏省普通高校研究生(博士)科研创新计划项目(CXZZ13-0539);; 常州工学院科研项目(YN1615)
【CateGory Index】: TU531.3
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