轻型木结构规格材弹性模量的两种无损法检测与评级  

Non-destructive Testing and Ratings of MOE of SPF Stock Lumbers by the Frequency Method and Sound Velocity Method

作　　者：王正[1] 饶鑫 杨小军 梁星宇 杨静 

机构地区：[1]南京林业大学 [2]不详

出　　处：《林产工业》2013年第5期30-33,共4页China Forest Products Industry

基　　金：2012年江苏省苏北科技发展计划科技型企业技术创新资金项目(BC2012416);2012-2013年江苏高校优势学科建设工程项目资助(PAPD,164020639)

摘　　要：根据动力学测试理论,采用频率法与应力波法,分别测量一批SPF规格材试件的频率和应力波传播速度;并通过自由梁一阶弯曲频率公式与应力波法公式推算得其弹性模量值。结论表明,两种方法得到的弹性模量数值是相同的;82%的SPF规格材试件的弹性模量高于GB50005-2003《木结构设计规范》Ⅱ。级设计要求。笔者提供的测试方法有助于提高我国轻型木结构建筑用材等检测技术水平。According to the dynamic testing theories,and through the frequency method and sound velocity method,the frequencies and stress wave propagation velocities of a batch SPF stock lumber＇ s testing pieces were measured,and the MOE was calculated by the first rank bend frequency formula in the free grider bearing state and stress wave velocity formula.The conclusions indicate that the measured MOE values of the two kinds of methods are the same,and the MOE of 82％ SPF stock lumber＇ s testing piece is higher than Ⅱc design requirement of GB 50005-2003——Code for design of timber structures.The above provided testing methods will help to enhance measuring technical levels of building materials of light frame construction,etc in our country.

关 键 词：轻型木结构 SPF 规格材 弹性模量 频率法 应力波法 

分 类 号：TS643[轻工技术与工程]