摘要
以磷石膏板替代普通石膏板应用于轻型木结构剪力墙中,是推进磷石膏建材资源化利用的有效途径之一,研究磷石膏面板-墙骨柱钉连接受力性能是磷石膏面板轻型木结构剪力墙可行性研究和整体受力分析的基础。通过对9组36个轻型木结构磷石膏面板-墙骨柱钉连接试件进行单调加载试验和有限元模拟,分别考虑板厚、钉边距和木纹方向的影响,研究其破坏形态、受力性能及主要参数影响规律,对试验数据进行统计分析,推导磷石膏面板-墙骨柱钉节点荷载-位移关系拟合方程,通过有限元模拟,验证钉节点荷载-位移模型的可靠性。研究结果表明,磷石膏面板-墙骨柱钉连接节点有钉孔下劈裂破坏、钉孔处水平断裂破坏及混合破坏3类破坏形态,可根据钉边距与板厚的比值进行判别;钉边距、板厚及磷石膏面板抗拉强度是磷石膏面板-墙骨柱钉连接节点受力性能的主要影响因素,考虑抗拉强度的钉边距与板厚比值参数ω与节点极限承载能力呈正比例关系。本研究建立的考虑关键参数的钉节点统一荷载-位移模型具有一定可靠度,可应用于磷石膏面板轻型木结构的理论研究和数值分析中。
Replacing ordinary gypsum panel with phosphogypsum panel in light wood shear wall is one of the effective ways to promote the utilization of phosphogypsum resource, and the research on mechanical behaviors of phosphogypsum panel-stud nailed joints is the basis of the force analysis and feasibility study of phosphogypsum panel used for light shear walls. Based on the monotonic loading test and finite element simulation of 36 specimens in nine groups of phosphogypsum panel-stud nailed joints, the influence of panel thickness, nail edge distance and wood grain direction were considered, and the failure mode, mechanical behaviors and main parameters were studied. The fitting equation of load-displacement relationship was deduced based on experimental data, and the reliability of the load-displacement model of phosphogypsum panel-stud nailed joints was verified by finite element simulation. The results showed that there were three kinds of failure modes of phosphogypsum panel-stud nailed joints, i.e., splitting failure under nail hole, horizontal fracture failure at nail hole and mixed failure, which could be distinguished according to the ratio of nail edge distance to panel thickness. The nail edge distance, panel thickness and tensile strength of phosphogypsum panels were the main influencing factors on the mechanical behaviors of phosphogypsum panel-stud nailed joints. When the plate thicknesses were the same, the ultimate load, ultimate displacement and initial stiffness of stud connection were increased with the increase of stud edge distance. The effect of stud edge distance on bearing capacity and ductility of phosphogypsum panel-stud nailed joints was the most obvious affecting parameter. The ratio of nail edge distance to panel thickness considering tensile strength was proportional to the ultimate bearing capacity of the nailed joints, and the ultimate bearing capacity increased with this ratio. The load-displacement curve of joint had initial elastic stage, plastic strengthening stage and failure stage. Th
作者
柏洁
文伟
周华
丁俊豪
BAI Jie;WEN Wei;ZHOU Hua;DING Junhao(College of Civil Engineering,Guizhou University,Guiyang 550025,China)
出处
《林业工程学报》
CSCD
北大核心
2023年第1期165-171,共7页
Journal of Forestry Engineering
基金
贵州省科技计划项目(黔科合基础2018[1405])。
关键词
磷石膏面板
墙骨柱
钉连接
力学性能
荷载-位移模型
phosphogypsum panel
stud
nailed joint
mechanical behavior
load-displacement deformation model
