古建筑木结构燕尾榫节点弯矩-转角关系理论分析

发布时间：2018-11-18 10:10

【摘要】：基于燕尾榫节点受力机理的分析,对燕尾榫节点的转动弯矩进行了理论分析,推导了燕尾榫节点弯矩-转角理论计算公式,并与试验结果进行了对比分析,理论分析结果与试验结果吻合较好;在计算公式的基础上,对燕尾榫节点转动弯矩的影响参数进行了分析,结果表明:在一定范围内,随着摩擦系数的增大,燕尾榫节点的转动弯矩和初始转动刚度也逐渐增大;当摩擦系数超过0.5时,节点的初始转动刚度增加幅度逐渐减小;榫头长度和榫头的"收乍"角度的增大均能够提高燕尾榫节点的转动弯矩以及初始转动刚度;榫头高度的增大能够一定程度地提高燕尾榫节点的转动弯矩,但对节点的初始转动刚度影响不大。所得结果可为古建筑木结构的受力分析提供依据。
[Abstract]:Based on the analysis of mechanical mechanism of dovetail joint, the rotational moment of dovetail joint is theoretically analyzed, the formula of moment-angle calculation is derived, and the results are compared with the experimental results. The theoretical analysis results are in good agreement with the experimental results. On the basis of the calculation formula, the influence parameters of rotational moment of dovetail joint are analyzed. The results show that: in a certain range, with the increase of friction coefficient, the rotational moment and initial rotational stiffness of dovetail joint also increase gradually; When the friction coefficient is more than 0.5, the initial rotational stiffness of the joint decreases gradually, and the increase of the tenon length and the "closing" angle of the tenon can improve the moment of rotation and the initial rotational stiffness of the joint. The increase of tenon height can improve the moment of joint rotation to some extent, but it has little effect on the initial rotational stiffness of the joint. The results can provide the basis for the mechanical analysis of the ancient building wood structure.
【作者单位】：西安建筑科技大学土木工程学院;上海市建筑科学研究院上海市工程结构安全重点实验室;陕西省建筑科学研究院;
【基金】：国家科技支撑计划课题项目(2013BAK01B03-02) 国家自然科学基金项目(51108373,51278399) 国家文物局文物保护科学和技术研究课题项目(20110123) 陕西省青年科技新星项目(2013KJXX-56) 上海市工程结构安全重点实验室开放课题项目(2014-KF05)
【分类号】：TU366.2

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