土木与环境工程学报（中英文）2024，Vol.46Issue(3)：144-151,8.DOI:10.11835/j.issn.2096-6717.2021.272
古建筑落叶松木构件自然老化材性变化
Properties change under natural aging of ancient building larch members
摘要
Abstract
In order to explore the change of wood properties of ancient building members under natural aging,a part of larch(Larix principis-rupprechtii Mayr)timber member of ancient building,which is about 350 years old,and a new timber with the same species and similar annual wheel width were used in this study.Small clear specimens were processed to measure the material properties(color,dry density and material mechanics property parameters)and non-destructive testing(NDT)parameters(micro-drill resistance value and velocity of ultrasonic wave).The nondestructive testing,physical and mechanical properties parameters of specimens were compared to analyze the variation and distribution,and then the multiple regression model for the physical and mechanical properties of ancient building timber were established based on the parameters measured in this study.The study results showed that the measured material property parameters and NDT parameters of the natural ageing wood specimens were significantly attenuated.And there is a highly significant difference in the color of natural aging specimens and new timber specimens.It was also found that the coefficients of variation of the parameters of natural aging specimens were all higher than those of new timber specimens,but both of them conformed to a normal distribution.Moreover,the developed model for the evaluation of physical and mechanical property parameters of larch timber members has a good evaluation performance.关键词
古建筑/木构件/故宫养心殿/自然老化/材性/衰减Key words
ancient building/timber members/Yangxin Hall of the Palace Museum/natural aging/property of wood/attenuation分类
建筑与水利引用本文复制引用
张典..古建筑落叶松木构件自然老化材性变化[J].土木与环境工程学报（中英文）,2024,46(3):144-151,8.基金项目
中国博士后科学基金(2018M641225) （2018M641225）
故宫博物院科研项目(201909012) China Postdoctoral Science Foundation(No.2018M641225) （201909012）
Project of the Palace Museum(No.201909012) （No.201909012）
