传统铁箍墩接法加固底部糟朽木柱轴压试验

发布时间：2018-08-18 15:25

【摘要】：铁箍墩接是古建木柱柱根糟朽的一种传统加固方法。为探讨该方法的有效性,以故宫内某古建木柱为例,进行了试验研究。制作了1根完好木柱、3根铁箍墩接法加固木柱,开展了轴压试验,获得了木柱加固前后的承载力-变形曲线,以及延性、应变、刚度等参数,讨论了铁箍墩接法的加固机理。结果表明:传统铁箍法加固底部糟朽木柱后,由于铁箍对木柱的侧向约束作用,木柱的极限承载力可恢复约91.8%,延性性能可恢复约95.2%,水平极限应变恢复率约97.2%,竖向极限应变恢复率约84.1%,且加固木柱的刚度要大于完好木柱。由于铁箍材料与木材强度差别较大,使得加固后木柱的整体性能要低于完好木柱,因而加固效果有限。结果可为古建筑木结构的保护与维修提供理论参考。
[Abstract]:The connection of iron hoop piers is a traditional reinforcement method for the root of ancient wooden columns. In order to investigate the effectiveness of this method, an experimental study was carried out on an ancient wooden column in The Imperial Palace. In this paper, one intact wooden column and three iron hoop piers are made to reinforce the columns. The axial compression tests are carried out. The load-deformation curves, ductility, strain and stiffness of the columns before and after reinforcement are obtained, and the reinforcement mechanism of the hoop piers is discussed. The results show that after the traditional iron hoop method is used to reinforce the rotten wood column at the bottom, the lateral restraint of the iron hoop on the wood column is obtained. The ultimate bearing capacity of the columns can be recovered about 91.8, the ductility of the columns can be recovered about 95.22.The recovery rate of horizontal ultimate strain is about 97.2. the vertical ultimate strain recovery rate is about 84.1, and the stiffness of the strengthened columns is larger than that of the intact columns. Due to the difference between the strength of iron hoop material and wood, the whole performance of the strengthened wood column is lower than that of the intact wood column, so the reinforcement effect is limited. The results can provide a theoretical reference for the protection and maintenance of ancient wooden structures.
【作者单位】：大同大学历史与旅游文化学院;故宫博物院;北京交通大学土木建筑工程学院;北京工业大学工程抗震与结构诊治北京市重点实验室;
【基金】：国家自然科学基金优秀青年项目资助(51422801);国家自然科学基金项目资助(51178028) 北京自然科学基金重点项目资助(8151003) 上海市工程结构安全重点实验室开放课题(2016-KF05)
【分类号】：TU366.2

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