本文是围绕改性速生杨木作为木结构用材的可能性展开研究的。依据《木材物理力学 试验方法》（GB/T1928-37－1991），采用标准无疵小试件，按标准试验方法，规划设计了 五个种类试验，共制作试件 300 余个，对改性速生杨木物理力学性质进行了试验研究，得 到了改性速生杨木的强度极限和弹性模量等力学指标，并对试验数据进行统计分析。 试验研究表明，改性速生杨木的气干密度 0.614g/cm 3 ，体积干缩系数 0.516％。顺 纹抗压强度标准值 29.74 N/mm 2 ，抗弯强度标准值 68.10 N/mm 2 ，抗弯弹性模量标准 值 6216 N/mm 2 。按照《木结构设计规范》（GB50005－2003）的相关计算方法，分析得出 改性速生杨木顺纹抗压强度的容许值为 8.59N/mm 2 ，抗弯强度容许值为 10.01N/mm 2 。 通过对比试验，分别对影响木材物理力学性质的主要因素进行了分析，指出含水率是 影响木材密度的主要因子之一，在一定范围内(8-15%),改性速生杨木的密度与含水率成正 比。改性速生杨木的体积干缩率和体积干缩系数平均值分别为 4.894％和 0.516％,表明改 性速生杨木干燥后尺寸和体积的变化属于中等。抗压强度与密度成正比，呈线性分布，抗 弯强度与密度的成正比，在一定范围内强度与含水率成反比。抗弯弹性模量与抗弯强度成 正比。改性速生杨木顺纹抗压强度和抗弯强度容许值满足木结构用材的要求。 基于改性速生杨木的物理力学性质，对照规范规定，可以确定，改性速生杨木用于园 林工程及建筑工程是可行和可能的，同时，其经济效益和社会效益是明显的。报告对改性 速生杨木适用范围、应用前景及值得继续研究的有关内容做了阐述。 关键词，改性速生杨木，力学性能，木建筑用材，可行性分析3 Feasibility Studies on Modified Fast-growing Wood of Poplar for Timber Structure Abstract The possibility of modified fast-growing poplar applied in timber structure was studied in the paper. According to methods of physical and mechanical tests of wood (GB/T 1928-37-1991), standard small samples without defects should be used, and five kinds of experiments were designed with more than 300 hundred test sample altogether, and physical and mechanical properties of modified fast-growing wood of poplar must be measured. Then ultimate strength and elastic modulus of modified fast-growing wood of poplar should be made sure through analyzing data by statistical methods. Experiments show: air-drying density was 0.614 g/cm 3 , coefficient of cubage shrinkage was 0.516%, compression strength parallel to grain normal value was 29.74 N/mm 2 , bending strength normal value was 68.10 N/mm 2 ,modules of elasticity was 6289 N/mm 2 . According to calculation methods of Timber Structure Design (GB50005-2003), the modified fast-growing poplar’s allowable stress was obtained. So allowable stress of grain compressive strength was 8.59N/ N/mm 2 , the bending strength was 10.01 N/mm 2 . Through the contrast experiment, several kinds of primary factors affecting wood physical and mechanical properties differently should be analyzed. The paper showed that water content was one of the important factors of density and density increased with the water content augment in certain scope. It also indicated that its average of shrinkage rate was 4.894％ and drying shrinkage coefficient was 0.516 ％ , modified fast-growing poplar shrinkage rank belonged to medium. The experiment indicated that Compression strength parallel to grain increased with density and reduced with the water rate in certain scope from 8% to 15%. Similarly, bending strength increased with density and reduced with the water rate from 8% to 15%.At the same time, the relationship between bending strength and bending elasticity modulus was direct proportion. The modified fast-growing poplar’s allowable stress of grain compressive strength and the bending strength was proved to satisfy the requirements of Timber Structure Design. Based on physical and mechanical properties of modified fast-growing wood of poplar,4 that the modified fast-growing poplar uses in the botanical garden project and the architectural engineering is feasible was indicated. Simultaneously, its economy and the social efficiency were proved to be obvious, and the related contents about the applicable scope, the application prospect and the thorough research should be explained. Key word: modified fast-growing poplar； mechanical properties； the wood architecture material； feasibility studies.5 目 录 致谢.........................................................................................................................................1 摘要...........................................................................................................................................2 ABSTRACT ................................................................................................................................. 3 1．概述......................................................................................................................................... 1 1.1 课题研究意义 ..................................................................................................................... 1 1.2 国内外研究现状 ................................................................................................................. 2 1.2.1 国内研究现状............................................................................................................... 2 1.2.2 国外研究现状............................................................................................................... 3 1.3 研究内容 ............................................................................................................................. 3 1.3.1 研究的主要内容........................................................................................................... 3 1.3.2 研究要解决的关键问题............................................................................................... 4 1.3.3 研究的主要技术路线................................................................................................... 4 2．改性速生杨木的实验室制备................................................................................................. 5 2.1 原材选择 ............................................................................................................................. 5 2.2ACQ 木材防腐处理............................................................................................................. 5 2.2.1．ACQ 基本理化性能及防腐性能............................................................................... 5 2.2.2．ACQ 处理工艺........................................................................................................... 6 2.3 强化处理 ............................................................................................................................ 6 2.3.1 浸胶工艺....................................................................................................................... 7 2.3.2 试验设备....................................................................................................................... 7 2.3.3 干燥.............................................................................................................................. 8 2.3.4 刨光砂光....................................................................................................................... 8 3．试验规划................................................................................................................................. 9 3.1 试验选材 ............................................................................................................................. 9 3.2 试验线路与主要仪器 ......................................................................................................... 9 3.3 试件制作 ........................................................................................................................... 10 3.4 试验结果处理方法 ........................................................................................................... 11 3.5 试验方法 ........................................................................................................................... 12 4．试验与数据分析............................................................................