木节对齿板连接剪切延性统计特性的影响

发布时间：2019-01-01 21:24

【摘要】：通过对比试验研究木节对90°纯剪、30°剪拉和150°剪压3类双剪试件齿板连接延性比的影响。试件选用北美二级SPF规格材及国产齿板制作,并设置有木节试件与无木节试件进行对比,有木节试件规格材连接区域含木节面积为482~2 016 mm~2。以有木节试件与对应的无木节试件延性比的比值为指标,通过正态性检验、方差齐性检验和方差分析研究木节对3类试件延性比比值的影响,并进一步分析延性比比值与木节面积的关系。结果表明:1)3类试件延性比比值的方差和均值无统计学上的显著差异;2)在试验选取的木节面积482~2 016 mm~2内,延性比比值的均值为0.993 4,变异系数为0.133 5,木节对延性比均值总体上影响很小,但延性比比值的离散性较大;3)在实际工程中,可以容许规格材连接区域内有一定面积或一定尺寸的木节存在。对于3类剪切试件,当规格材连接区域内木节面积小于2 016 mm~2(折算直径51 mm)时,可以忽略木节对延性比均值的影响。
[Abstract]:The effects of the joints on the ductility ratio of tooth plate connection of 90 掳pure shear, 30 掳shear tension and 150 掳shear compression were studied through comparative tests. The specimens were made of North American secondary SPF specifications and domestic toothed plates, and compared with the non-wood joints. The connecting area of the specifications of the wood joints was 482n 2 016 mm~2.. Based on the ratio of the ductility ratio of the nodal specimen to the corresponding non-wood nodal specimen as the index, the effects of the node on the ductility ratio of the three types of specimens were studied by normal test, homogeneity test of variance and analysis of variance. Furthermore, the relationship between ductility ratio and nodal area is analyzed. The results showed that: 1) there was no significant difference in variance and mean value of ductility ratio between the three types of specimens; 2) the average ductility ratio was 0.993 4 and the coefficient of variation was 0.133 5 within 482 ~ 2016 mm~2. The average ductility ratio had little effect on the average ductility ratio, but the dispersion of the ductility ratio was larger. 3) in the practical engineering, it is possible to allow the existence of a certain area or a certain size of wood joints in the connection area of the specification material. For the three types of shear specimens, when the nodal area in the connection area of the specifications is less than 2 016 mm~2 (converted diameter 51 mm), the effect of the node on the mean ductility ratio can be neglected.
【作者单位】：四川大学建筑与环境学院;
【基金】：成都市科技局惠民工程项目(2013惠民工程-12)
【分类号】：TU366.2

【相似文献】