重组竹梁抗弯性能试验  

Research on the flexural performance of bamboo scrimber

作　　者：张苏俊[1,2] 赵志高[2] 张文娟[2] 石亚勇[2] 朱南峰[1] 

机构地区：[1]南京林业大学材料与科学工程学院,南京210037 [2]扬州工业职业技术学院,江苏扬州225127

出　　处：《扬州大学学报（自然科学版）》2016年第1期51-54,67,共5页Journal of Yangzhou University：Natural Science Edition

基　　金：国家林业局948资助项目(2015-4-57)

摘　　要：为研究重组竹的抗弯性能,本文制作了6根足尺矩形截面重组竹梁,采用4点弯曲加载方法,测量了不同荷载下重组竹梁的跨中挠度和横截面应变.试验结果表明:重组竹梁的跨中挠度和纵向应变均与荷载成线性关系,且与理论结果一致;指接位置接近支座时,重组竹梁的抗弯性能较好,试验所得最大压应变和最大拉应变分别为-7.855 62×10^(-3)和6.980 27×10^(-3),极限荷载为110kN,最大挠度为28.75mm;指接位置位于跨中时重组竹梁抗弯性能较差,此时重组竹梁的最大压应变和最大拉应变分别为-2.717 44×10^(-3)和3.584 94×10^(-3),极限荷载仅为65.34kN,最大挠度为14.44mm.因此,重组竹梁用作抗弯构件时应避免指接位置位于受拉侧弯矩较大处..This paper describes the bending test of six full-scale parallel bamboo strand lumber beams of rectangular cross-section by adopting the method of four point bending load.The recombinant bamboo beams under different load of midspan deflection and cross-section strain are measured.Experimental results indicate that the deflection and strain of the beam is linear with the load,which is in good agreement with the theoretical formula.It is also found that the finger located near the bamboo beam support restructuring has better performance when bending.The maximum compressive strain and the maximum tensile strain are respectively-7.855 62×10-3 and6.980 27×10-3.The ultimate load is 110 kN,and the maximum deflection is 28.75 mm.And the finger located recombinant bamboo beam span is poor in bending performance.The maximum compressive strain and the maximum tensile strain are respectively-2.717 44×10-3 and 3.584 94×10-3.The ultimate load is 65.34 kN,and the maximum deflection is 14.44 mm.So it is recommended that manufacturers should avoid making finger located at tension side with big moment.

关 键 词：重组竹梁 抗弯性能 静力试验 

分 类 号：TU366.1[建筑科学—结构工程]