木结构古建筑槛窗木构架抗震性能及价值损伤研究
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作者单位:

1.石家庄铁道大学;2.北京工业大学

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基金项目:

北京市自然科学基金-市教委联合资助项目(KZ202010005012),国家重点研发计划课题(2019YFC1520803)


Experimental and value loss study on Kanchuang frame of ancient timber architecture
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Affiliation:

1.Shijiazhuang Tiedao University;2.Beijing University Of Technology

Fund Project:

Beijing Municipal Commission of Education and Natural Science Foundation (No. KZ202010005012); National Key Research and Development Project(No. 2019YFC1520803)

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    摘要:

    为了研究木结构古建筑带内部填充木框架的抗震性能和价值损伤规律,选取清式木结构古建筑中广泛应用的槛窗木构架为研究对象,制作了缩尺比例为1:2的试验模型进行了低周往复试验。分析了槛窗木构架的荷载-位移滞回曲线、骨架曲线、刚度退化规律和耗能能力。试验结果表明:槛窗木构架滞回曲线有明显的“捏缩效应”,随着加载位移的增大和加载循环次数的增多这种效应就越明显;试验过程中墙体首先发生破坏,而后随着加载的进行墙体破坏逐渐加剧,木构件出现拔榫,棂条劈裂等破坏。墙体对木构架的刚度影响较大。在此基础上结合槛窗木构架可能存在的价值点,建议了基于价值的损伤评价指标,为古建筑的修复、加固和价值损伤评估提供参考。

    Abstract:

    In order to study the seismic performance of timber frame, which are used in ancient timber architecture and infilled with windows and wall, Kanchuang frame is selected as the study object. Kangchuang frames are widely used in Qing official architecture. Low cyclic loading test is carried out on 1:2 reduced-scale models. The load-displacement hysteretic curves, skeleton curves, stiffness degradation laws, deformation and energy dissipation capacity of models were analyzed. Research results show that the load-displacement t hysteretic curves have obvious pinching effect and becomes more obvious as the load and loading times increase. The walls of Kanchuang frame are cracked at first, then the cracks increase while the load increase. The tenon gradually pull out of mortise-tenon joints and the components of widows cracks. Walls contribute great stiffness to the structure. Base on the results, a value-based damage evaluation standard for Kanchuang frame is proposed, which provide good reference for seismic analysis, restoration, and value loss evaluation of ancient timber architecture.

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  • 收稿日期:2020-12-31
  • 最后修改日期:2021-03-19
  • 录用日期:2021-03-25
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