新疆杨木柱偏心受压试验研究  

Experimental Study on Xinjiang Poplar Column under Eccentric Compression

作　　者：李亮翔 刘清[1] 韩霞[1] 谭鑫宇 殷芳 LI Liangxiang;LIU Qing;HAN Xia;TAN Xinyu;YIN Fang(School of Architecture and Civil Engineering,Xinjiang University,Urumqi Xinjiang 830017,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830017

出　　处：《新疆大学学报（自然科学版）（中英文）》2022年第2期249-256,共8页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：新疆维吾尔自治区自然科学基金(2019D01C048)。

摘　　要：针对12根不同偏心距的新疆杨木柱进行了偏心受压试验,分析了其破坏形态、荷载-位移曲线、荷载-纵向应变曲线及极限承载力.结果表明:轴心受压木柱中部发生局部褶皱和压弯破坏,偏心受压木柱典型的破坏形态以中部压弯破坏为主;随着偏心距的增大,荷载-位移曲线峰值点对应的竖向位移和侧向挠度均增大,但侧向弯曲变形更显著;荷载-应变曲线峰值点对应的受压侧压应变随着偏心距的增大而增大,偏心受压试件的受压侧木材的受压变形能力及强度得到充分发挥;在不同偏压荷载作用下,木柱中部横截面应变沿截面高度的变化规律基本满足平截面假定;随着偏心距的增大,极限承载力降低幅度呈现减小趋势.拟合给出了偏压承载力计算式中的相对偏心率折减系数,计算结果与试验结果吻合较好.The eccentric compression tests of 12 Xinjiang poplar columns with different eccentricity were carried out, and the failure modes, load-displacement curves, load-longitudinal strain curves and ultimate bearing capacity were analyzed. The results show that local folding and bending failure occur in the middle part of the axial compression timber column, and the typical failure mode of the eccentric compression timber column is mainly the bending failure in the middle part. With the increase of eccentricity, the vertical displacement and lateral deflection corresponding to the peak point of load-displacement curve increase, and the lateral bending deformation becomes more obvious. The compressive strain of concave surface corresponding to the peak point of load-strain curve increases with the increase of eccentricity, and the compressive deformation capacity and strength of the wood on the side of the specimen under eccentric compression are fully exerted. Under the action of different bias loads,the variation law of the central section strain along the height of the section basically satisfies the assumption of the plane section. With the increase of eccentricity, the decreasing amplitude of ultimate bearing capacity showed a decreasing trend. Finally, a formula for calculating the bias bearing capacity based on the relative eccentricity reduction coefficient was proposed, and the calculated results were in good agreement with the experimental results.

关 键 词：新疆杨木柱 偏心受压 破坏形态 承载力 

分 类 号：TU366.2[建筑科学—结构工程]