摘要
古建筑木结构燕尾榫节点由于其独特的构造特征而具有与其他节点不同的性能,已有的分析模型不能完全适用于燕尾榫节点。在分析燕尾榫节点受力机理的基础上,根据节点的力学平衡和变形协调关系对燕尾榫节点的弯矩-转角关系进行了理论推导,结合已有的燕尾榫节点拟静力试验结果,提出了以屈服点、极限点为特征点的燕尾榫节点弯矩-转角双折线模型,给出了模型特征点参数计算公式。结果表明,用该模型所得弯矩-转角曲线与试验骨架曲线基本吻合。研究成果可为古建筑木结构的修缮加固提供理论依据。
The existing analysis model for a common joint is not suitable for a dovetail mortise-tenon joint due to its unique construction features. The force mechanism of a dovetail mortise-tenon joint was investigated and the moment-rotation relationship was deduced according to the mechanical equilibrium and deformation coordination. A two-linear model defined with a yield point and an ultimate point was proposed based on the results of a low-cyclic reversed loading test, and the calculated method for the characteristic points are recommended. The results obtained by the calculated model agree well with the experimental results. They are usable for the protection and maintenance of ancient timber buildings.
出处
《工程力学》
EI
CSCD
北大核心
2016年第8期39-44,共6页
Engineering Mechanics
基金
国家自然科学基金项目(51278399)
陕西省自然科学基础研究计划重大基础研究项目(2016ZDJC-23)
国机集团科技发展基金资助项目(13科192号)
上海市工程结构新技术重点实验室开放课题项目(2014-KF05)
西安建筑科技大学创新团队资助计划项目
关键词
古建筑木结构
燕尾榫节点
受力机理
弯矩-转角模型
理论分析
ancient timber structure
dovetail mortise-tenon joint
force mechanism
moment-rotation model
theoretical analysis
