闽浙木拱廊桥榫卯节点受力性能研究. (Chinese)

In order to study the mechanical performance of the mortise-tenon joints of Minzhe timber arch bridge, the finite element model of the bridge joints were established and the rationality of the modeling method was verified in this study. The influence of length, connection angle and beam diameter on the mechanical performance of the joint was investigated. The results showed that with the increase of angle and beam diameter, the ultimate bearing capacity of straight tenon joints became higher, and the ultimate bearing capacity of straight tenon joints increased first and then decreased with the increase of tenon length. The increase of tenon length and beam diameter improved the initial rotational stiffness of straight tenon joints, and the influence of tenon length on the mechanical performance of straight tenon joints was the most significant. The initial rotational stiffness and ultimate bearing capacity of dovetail joints can be improved with the increase of tenon length, angle and beam diameter. [ABSTRACT FROM AUTHOR]

为研究闽浙木拱廊桥榫卯节点受力性能, 本研究建立了廊桥节点有限元模型, 并验证了建模方法合理性。研究 对直榫节点与燕尾榫节点进行分析, 考察了榫头长度、节点连接角度和苗杆直径对节点受力性能的影响。结果表明：随 着连接角度、苗杆直径的增大, 直榫节点的极限承载力变大, 直榫节点的极限承载力随着榫长增加先增大后减小。榫长 与苗杆直径的增大可提高直榫节点的初始转动刚度, 其中榫长对直榫节点受力性能的影响最为显著。榫长、节点连接角 度和苗杆直径增加均能提高燕尾榫节点的初始转动刚度和极限承载力。 [ABSTRACT FROM AUTHOR]

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