摘要
为研究藏式古建木构梁柱连接的转动性能,进行了6个试件的静力试验。考虑了弓木长度、暗销位置对于节点初始转动刚度的影响,以及反复荷载作用下节点刚度退化规律。试验结果分析表明:典型藏式古建木构梁柱节点的弯矩-转角曲线可简化为双线性模型;随弓木长度增加,节点初始转动刚度增大;暗销内移后,节点初始转动刚度变小;相同条件下,弓木-梁间暗销内移引起的变化小于垫木-弓木间暗销内移;反复荷载作用下节点刚度退化明显,且存在跃迁现象。
Static experiment was carried out to study rotation behavior of timber beam-column connection.The influence of length of Gongmu and position of dowel on the initial rotational stiffness of the joint was analyzed.Rules of stiffness degradation under cyclic loading were studied as well.The results show that： the moment-rotation curve of typical timber beam-column connection can be simplified as bilinear model;the initial rotational stiffness of the joint is enhanced with the increase of the length of Gongmu,and it is decreased with the inward movement of dowel;under the same conditions,the influence of the inward movement of Gongmu-beam dowel on the initial rotational stiffness of the joint is smaller than that of Dianmu-Gongmu dowel;and stiffness degrades under cyclic loading and there exists obvious transition phenomenon.
出处
《土木建筑与环境工程》
CSCD
北大核心
2011年第6期112-119,共8页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金资助项目(51178028
50938008)
关键词
藏式古建筑
梁柱连接节点
模型试验
节点转动性能
刚度
ancient Tibetan buildings
beam-column connection
model experiment
rotation behavior of joint
stiffness
