一、前言木材具有容重小,易加工,能耗低,可以就地取材,干燥木材的性能相当稳定,这些优点是其他材料所不能比拟的。正因为木材的这些优点,使木材不仅成为古代的主要建筑材料,而且也是现代建筑的重要材料。目前欧美等发达国家中,建筑木材的用量正逐年增大。但木材也有一个显著的缺点即是它容易受恶劣环境的影响而致材质发生变化。 First, the foreword The wood has the small bulk density, is easy to process, the energy consumption is low, can obtain the material on the spot, the dry wood performance is quite stable, these advantages are other materials cannot compare. Because of these advantages of wood, wood has not only become the main building material in ancient times, but also an important material for modern architecture. At present, in Europe and the United States and other developed countries, the amount of construction timber is increasing year by year. However, wood also has a significant drawback: it is vulnerable to harsh environments and changes in texture.