摘要
目的研究不同螺钉直径和钉入角度下竖向拼接木梁的抗弯性能变化规律。方法通过有限元软件ABAQUS建立8个拼接木梁有限元模型,研究不同螺钉直径(8、10、12、16mm)和不同螺钉钉入角度(45°、60°、90°)对拼接木梁极限线荷载及跨中挠度的影响规律。螺钉采用分段均匀分布排列,螺钉与木梁应用梁-实体耦合。结果90°钉入时,拼接木梁采用16mm螺钉比8mm螺钉极限线荷载提高了11.38%,跨中挠度减小17.88%;8mm螺钉下45°与90°钉入相比,拼接木梁极限线荷载提高了11.38%,跨中挠度减小14.60%。结论增加螺钉直径可提高拼接木梁的抗弯性能,但螺钉钉入角度越小,改变螺钉直径对拼接木梁抗弯性能的影响越小;减小螺钉钉入角度可提高拼接木梁的抗弯性能,但螺钉直径越大,通过减小螺钉钉入角度来提升拼接木梁抗弯性能的效果越差。
In order to study the variation of bending behavior of vertically spliced wooden beams under different screw diameters and screw insertion angles.The finite element software ABAQUS was used to establish eight models,studying the effects of different screw diameters(8 mm,10 mm,12 mm,16 mm)and screw insertion angles(45°,60°,90°)on the ultimate line loads and mid-span deflections of the spliced wooden beams.Screws were arranged in piecewise uniform distribution,the screws and wooden beams use beam-to-solid coupling.When insertion angle at 90°,compared with 8 mm screws,the ultimate line load was increased by 11.38%and the mid-span deflection was decreased by 17.88%of splicing wooden beams with 16 mm screws.When diameter is 8 mm,insertion angle at 45°compared with 90°,the ultimate line load was increased by 11.38%and the mid-span deflection was decreased by 14.60%of splicing wooden beams.Increasing the diameter of screws can improve the bending behavior of splicing wooden beams,but the smaller the insertion angle of screws,the smaller the influence of changing the diameter on the bending behavior of spliced wooden beams.Decreasing the insertion angle of screws can improve the bending behavior of spliced wooden beams,but the larger the diameter of screws,the worse the effect of decreasing the insertion angle to improve the bending behavior of spliced wooden beams.
作者
刘永军
李亚雄
LIU Yongjun;LI Yaxiong(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第3期444-451,共8页
Journal of Shenyang Jianzhu University：Natural Science
基金
“十三五”国家重点研发计划项目(2018YFD1100403)。
关键词
拼接木梁
抗弯性能
螺钉直径
螺钉钉入角度
梁-实体耦合
spliced wooden beam
bending behavior
diameter of screw
insertion angle of screw
beam-to-solid coupling
