足尺宋式摇摆木构架恢复性的拟静力试验研究
CSTR:
作者单位:

太原理工大学

基金项目:

国家自然科学基金重点项目(No.51338001),国家自然科学基金面上项目(No.51278324)


Experimental study on loading quasi-static of a Full-Scale Traditional Chinese Rocking Timber Structure
Author:
Affiliation:

Taiyuan University of Technology

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    摘要:

    摇摆木构架为中国传统木结构的主要承载体系。对足尺单跨木构架模型进行拟静力试验,探究其在不同竖向荷载下的结构特性。加载过程中,木柱摇摆、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、等效刚度退化显著、等效粘滞阻尼系数低;残余位移介于0.28mm至2.53mm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倍至86.47倍,层间位移集中系数介于1.22至2.03间且随控制位移的增加先增后降。本文研究成果能够为木构架摇摆性能的试验探究提供路径,也能够为同类型木构架结构性能评估以及加固修缮提供参考。

    Abstract:

    Rocking timber frame is the main bearing system of Chinese traditional timber structure. The pseudo static test of full-scale single span wood frame model was carried out to explore its structural characteristics under different vertical loads. In the loading process, the column rocks and the deformation of the column frame layer is 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 0.28mm and 2.53mm, and the two displacement recovery coefficients are greater than 87.1%. The two type of displacement recovery coefficient do not decrease significantly with the increase of control displacement, so the displacement recovery ability of wood 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. The results can not only provide a path for the experimental exploration of the rocking performance of traditional Chinese timer frame, but also provide a reference for the performance evaluation, reinforcement and repair of the same type of traditional Chinese timber frame.

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  • 收稿日期:2021-09-06
  • 最后修改日期:2021-11-24
  • 录用日期:2021-12-18
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