不同工况下燕尾榫节点力学性能分析  

Mechanical Performance Analysis of Dovetail Joints Under Different Working Conditions

作　　者：白玉星 张梓巍 龙锐 孙澜曦 BAI Yu-xing;ZHANG Zi-wei;LONG Rui;SUN Lan-xi(School of Civil Engineering,North China University of Technology,Beijing 100144,P.R.China;Beijing Gas Group Company Limited,Beijing 100035,P.R.China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]北京市燃气集团有限责任公司,北京100035

出　　处：《林产工业》2024年第5期39-45,共7页China Forest Products Industry

基　　金：北京市教委科技计划一般项目(No.KM202210009007)。

摘　　要：为探究不同工况对燕尾榫节点力学性能的影响,以清工部《清代工程则例》及《中国古建筑木作营造技术》为权衡标准,以其他学者的木材材性试验结果为参照,基于ABAQUS有限元软件对清代燕尾榫进行了拟静力荷载数值模拟,探究了榫头平面外不同转角、不同材料、不同柱端轴向荷载、不同荷载位置对燕尾榫节点力学性能的影响。结果表明:1)燕尾榫卯的滞回曲线均呈“倒Z型”。2)燕尾榫节点处的最大弯矩在枋体侧向转角为0°、1.41°、2.82°时分别为0.896、0.914、0.979 kN·m。当柱顶的轴向荷载从0增加至50 kN时,燕尾榫节点的双向最大弯矩分别从0.896、0.523 kN·m变为2.680、5.129 kN·m。双向屈服弯矩分别从0.823、0.473 kN·m变为2.366、4.172 kN·m。当柱顶轴向荷载由50 kN增加至100 kN时,双向最大弯矩、屈服弯矩变化值均不超过1%。3)枋侧施加0、25、50 mm水平位移时对应的燕尾榫节点峰值粘滞阻尼系数分别为22.05%、28.50%、29.38%。In order to explore the influence of different working conditions on the mechanical properties of dovetail joints,in this paper,the"Qing Dynasty Engineering Rules"of the Ministry of Qing Dynasty and"Wood Construction Technology of Ancient Chinese Buildings"were used as the weighing standards,using the results of wood properties tests conducted by other scholars as a reference,the numerical simulation of pseudo-static load was carried out on the dovetail joints of Qing Dynasty based on the finite element software ABAQUS.The influence of different angles outside the plane of tenon,different materials,different axial loads,and different load positions on the mechanical properties of dovetail tenon joints was investigated.The results showed that:1)The hysteretic curves of dovetail mortise and tenon are all inverted z-shape.2)The maximum bending moments at dovetail joints were 0.896,0.914 kN·m and 0.979 kN·m when the lateral angles of the Fangs were 0°,1.41°and 2.82°,respectively.When the axial load at the top of the column increases from 0 to 50 kN,the two-way maximum bending moments of dovetail joints change from 0.896 kN·m and 0.523 kN·m to 2.680 kN·m and 5.129 kN·m respectively.The two-way yield moment changed from 0.823 kN·m and 0.473 kN·m to 2.366 kN·m and 4.172 kN·m respectively.When the axial load at the top of the column increases from 50 kN to 100 kN,the changes of the two-way maximum bending moment and yield bending moment do not exceed 1%.3)The peak viscous damping coefficients of dovetail joints corresponding to horizontal displacements of 0,25 mm,and 50 mm applied on the beam side are 22.05%,28.50%,and 29.38%,respectively.

关 键 词：复杂应力 燕尾榫节点 力学性能 拟静力试验 数值模拟 ABAQUS 

分 类 号：TS6[轻工技术与工程] TS396