摘要
为研究黔东南木结构鼓楼边柱的压扭性能,以典型鼓楼边柱作为研究对象,设计制作了5个缩尺柱模型,研究其在不同轴压比、直径下的压扭性能,并通过低周反复荷载试验对其破坏模式、滞回性能、承载力变化以及刚度退化规律等进行分析。结果表明:在低周反复荷载作用下,木柱的破坏位置各有不同,其破坏方向比较一致,均是沿着顺纹方向发生斜向开裂,这与鼓楼实际倒塌破坏现象吻合;试件的滞回曲线呈较为饱满的圆环形,随加载变形的增加,滞回环逐渐出现捏拢现象,滞回环面积逐渐增加;随着轴压比的增大,试件的滞回曲线饱满程度明显降低,捏拢现象明显,柱刚度、承载力及耗能能力均有所降低;随着试件直径的增大,滞回环面积趋于饱满,且滞回环面积增大,刚度、承载力及耗能能力增加。研究结果以期为鼓楼的营造及加固改造提供参考。
To investigate the compression-torsion performance of the edge columns of the wooden drum towers in Southeast Guizhou,typical edge columns of drum towers were selected as the research subjects.Five scaled column models were designed and fabricated for studying their compression-torsion performance under different axial compression ratios and slenderness ratios.Low-cycle loading tests were conducted thus the corresponding failure modes,hysteretic performance,load-bearing capacity,and stiffness degradation were analyzed.The results indicate that under the action of low-cycle loads,the failure locations of the wooden columns vary,but their failure directions are consistent,all occurring as diagonal cracking along the grain direction,which matches the actual collapse and failure phenomena of drum towers;the hysteretic curves of the specimens exhibit a relatively full circular shape,and as the deformation under load increase,the hysteretic loops gradually show a pinching phenomenon,with the area of the hysteretic loops gradually increasing;with the increase of the axial compression ratio,the fullness of the hysteretic curves of the specimens obviously decrease,the pinching phenomenon become more apparent,and the column stiffness,load-bearing capacity,and energy dissipation capacity all decrease;as the diameter of the specimens increase,the hysteretic loop area tend to be fuller,and the area of the hysteretic loops increase,with an increase in stiffness,load-bearing capacity,and energy dissipation capacity.This study can provide references for the construction and reinforcement modification of drum towers.
作者
车方涛
黄勇
陈波
周理
CHE Fangtao;HUANG Yong;CHEN Bo;ZHOU Li(College of Architecture and Urban Planning,Guizhou University,Guiyang 550025,China)
出处
《贵州大学学报(自然科学版)》
2025年第4期73-79,共7页
Journal of Guizhou University:Natural Sciences
基金
国家自然科学基金资助项目(52068009)。
关键词
木结构鼓楼
轴压比
长细比
压扭性能
低周反复荷载试验
wooden drum tower
axial compression ratio
slenderness ratio
compression-torsion performance
low-cycle loading tests
