摘要
摇摆木构架是中国传统木结构的主要承载体系。对足尺单跨木构架模型施加3级竖向荷载进行拟静力试验,观察试验时木构架的位移和变形特点,得到木构架在低周水平循环加载下的滞回曲线和骨架曲线,探究其在不同竖向荷载和低周水平循环加载下的结构特性。加载过程中,木柱刚体转动行为明显、柱架层变形集中,卸载阶段木构架能自主回到初始位置。试验结果表明:各级滞回环狭长且重叠,结构构件呈现出刚体运动的特征,结构整体具有一定位移恢复能力;残余位移介于0.28~2.53 mm间,两组位移恢复系数均大于87.1%,随控制位移的增加未出现显著降低,木构架的位移恢复能力良好;初始刚度在控制位移超过屈服位移后趋于稳定;柱架层变形是斗拱层变形的2.95~86.47倍,层间位移集中系数介于1.22~2.03间,且随控制位移的增加先增后降。
Rocking timber frame is the main bearing system of Chinese traditional timber structure.The pseudo static test was carried out on the full-scale single-span timber frame model under three-level vertical load.The displacement and deformation characteristics of the timber frame during the test were observed.The hysteretic curve and skeleton curve of the timber frame under low cycle horizontal cyclic loading were obtained to explore its structural characteristics under different vertical loads and low cycle horizontal cyclic loading.In the loading process,the column rocks and the deformation of the column frame layer are concentrated,and the test object can return to the initial position independently in the unloading stage.The test result shows that the hysteresis loops of each stage are long,narrow and overlap.The equivalent stiffness degrades significantly,and the equivalent viscous damping coefficient is low;the residual displacement is between 0.28 mm and 2.53 mm,and the two displacement recovery coefficients are greater than 87.1%.The two type of displacement recovery coefficient does not decrease significantly with the increase of control displacement,so the displacement recovery ability of timber frame is good;the initial stiffness tends to be stable when the control displacement exceeds the yield displacement;the deformation of column frame layer is 2.95 to 86.47 times that of dougong bucket layer.The concentration coefficient of interlayer displacement is between 1.22 and 2.03,which first increases and then decreases with the increase of control displacement.
作者
曹一凡
万佳
师希望
魏剑伟
李铁英
CAO Yifan;WAN Jia;SHI Xiwang;WEI Jianwei;LI Tieying(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,P.R.China)
出处
《土木与环境工程学报（中英文）》
CSCD
北大核心
2024年第2期129-137,共9页
Journal of Civil and Environmental Engineering
基金
国家自然科学基金(51338001,51278324)
中国博士后科学基金(2019M661064)。
关键词
传统木结构
摇摆木构架
可恢复功能结构
位移恢复系数
层间位移集中系数
traditional timber structure
rocking timber frame
recoverable functional structure
displacement recovery coefficient
concentration coefficient of interlayer displacement
作者简介
曹一凡(1997-),女,主要从事古建筑木结构抗震性能研究,E-mail:cyf316420@163.com;通信作者:李铁英,男,教授,博士生导师,Email:lty680412@163.com。
