摘要
采用压杆挠曲线法分析了木节对轴心受压胶合木柱稳定承载力的影响,分析时考虑了初弯曲、初偏心以及木节和木材本构的弹塑性等因素的影响。在考虑木节的影响时,模型中将截面分为木节区、木节影响区和无影响区,3个区域分别采用不同的本构模型,木节区的位置由自编程序随机产生,以模拟实际工程中木节在构件中的随机分布。分别计算了木节率为2%、6%和9%时的稳定系数φ。计算结果表明,木节会在一定程度上降低轴心受压胶合木柱的稳定承载力。数值计算结果和试验数据的对比表明,数值计算结果与试验结果吻合较好。
The effect of knot was analyzed on stability of glulam column under Axial Compressive Loading, using the column deflection curve method （CDC method）. The initial bending, eccentricity, wood knots and elastic-plasticity of wood were considered for analysis. The member in the model was divided into three areas： knot area, knot influence area and no influence area, and three related constitutive relations were adopted in the process of analyzing. The locations of knots were randomly generated by designed program to simulate the randomly distributed knots in practical components. The stability coefficient φ was calculated considering knot at the rate of 2 %, 6 % and 9 %, respectively. The results showed that the knots could reduce the stability capacity of the glulam column in axial compression in some degree. The numerical data was further compared with the test data and they were fit well each other.
出处
《土木建筑与环境工程》
CSCD
北大核心
2017年第3期44-49,共6页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金(51208536)~~
关键词
胶合木柱
压杆挠曲线法
稳定性
木节影响
glulam column
column deflection curve method
stability
effect of knot
