工艺参数对正交胶合竹木滚动剪切强度的影响  

Effects of Manufacturing Parameters on Rolling Shear Strength of CLBT

作　　者：王新雨 张秀标 覃道春 严彦 赵晨朦 WANG Xinyu;ZHANG Xiubiao;QIN Daochun;YAN Yan;ZHAO Chenmeng(Sanya Research Base of International Center for Bamboo and Rattan,Sanya 572000,Hainan,China;National Bamboo and Rattan Engineering Technology Research Center,Huangshan 245716,Anhui,China)

机构地区：[1]国际竹藤中心三亚研究基地,海南三亚572000 [2]国家竹藤工程技术研究中心,安徽黄山245716

出　　处：《西北林学院学报》2025年第2期220-225,共6页Journal of Northwest Forestry University

基　　金：国家自然科学基金面上项目“竹木原态正交复合成型机制”(32371982)。

摘　　要：准确评估并提高正交胶合竹木(CLBT)的滚动剪切性能,在实际工程应用中尤为重要。本研究以国产杉木和毛竹展平竹为基材制备CLBT,通过三点弯曲试验方法测试CLBT在强轴和弱轴方向上的滚动剪切强度,研究施胶量(200、250 g/m^(2))和压力(0.4、0.6、0.8 MPa)2种工艺参数对CLBT滚动剪切强度的影响。结果表明:1)压力对CLBT强轴方向上的滚动剪切强度有显著影响,对弱轴方向上的滚动剪切强度无显著影响。相比于0.4和0.8 MPa,压力为0.6 MPa时滚动剪切强度最好。2)施胶量对强轴和弱轴方向上的滚动剪切强度无显著影响,相比于200 g/m^(2)的施胶量,250 g/m^(2)时滚动剪切强度更大。3)施胶量和压力的交互效应对CLBT强轴和弱轴方向上的滚动剪切强度均无显著影响。It is very important to accurately evaluate and improve the rolling shear performance of crosslaminated bamboo and timber(CLBT)for its practical engineering application.In this paper,CLBT was prepared using domestic fir and Moso bamboo as the base materials.The rolling shear strength(RSS)of CLBT in the major and minor strength directions was tested through the three-point bending test method.The effects of resin content(200,250 g/m^(2))and pressure(0.4,0.6,0.8 MPa)on the RSS of CLBT were studied.The test results showed that 1)pressure had a significant effect on the RSS in the major strength direction of CLBT,but had no significant effect on the RSS in the minor strength direction.Compared with 0.4 and 0.8 MPa,the rolling shear strength of 0.6 MPa was better.2)The resin content had no significant effect on the RSS in the major and minor strength directions.Compared with the resin content of 200 g/m^(2),the RSS with 250 g/m^(2) was greater.3)The interactive effect of resin content and pressure had no significant impact on the RSS in the major and minor strength directions of CLBT.

关 键 词：正交胶合竹木 滚动剪切强度 强轴方向 弱轴方向 

分 类 号：TU366.3[建筑科学—结构工程]