古建筑木结构修缮加固时木材材料强度取值探讨

Study on calculation method of wood strength for ancient timber structure buildings

古建筑木结构由于木材自身的缺陷以及自然与人为的破坏,都急待修缮加固.木材材料强度的大小是制定修缮加固方案、确定更换构件与否的基础,但目前尚缺乏这方面的研究成果.考虑到古建筑木材材料性能退化,分析了古旧木材历经年限对木材强度的影响和横向裂纹对木材抗弯强度的影响,提出了古建筑木结构修缮加固时木材材料强度的取值方法,可为古建筑木结构的修缮加固提供参考.

It is urgent to maintain and reinforce many ancient timber structure buildings because of disadvantage of wood and destruction by nature and mankind.The strength of wood is the basis to establish repair scheme and determine replace one member whether or not are determined by,but there is a lack of the research achievements.In the paper,the performance degradation regularity of ancient or old wood and the effect of transverse crack to wood bending strength are analyzed,and the calculation methods of strength of wood for ancient timber structure buildings are provided.This may help the maintenance and reinforcement for ancient timber structure buildings.