不同工艺参数对玻璃纤维加固木结构可靠性的影响.docVIP

  不同工艺参数对玻璃纤维加固木结构 可靠性的影响# 朱晓冬，刘玉** 5 10 （东北林业大学材料科学与工程学院，哈尔滨 150040） 摘要：将有限元分析和无损检测方法用于玻璃纤维加固木结构规格材的可靠度研究。建立规 格材的动力有限元分析模型，研究了玻璃纤维厚度、施胶量、贴面尺寸对规格材弹性模量的 影响，根据原材料价格和施工工艺选择最佳贴面参数，在可靠度满足 96%以上的条件下，最 2 件下，最佳贴面参数为贴面厚度 10mm，施胶量 125g/m2，贴面尺寸为 1/2。通过可靠性分析 结果表明素材在 425N 载荷下挠度小于 0.003L 的概率是 9%，而贴玻璃纤维后可靠度平均达 到 53.8%；小于 0.005L 的概率是 71.6%，而贴玻璃纤维后可靠度达到 97.3%。 关键词：木材科学与技术；木结构规格材；振动无损检测；有限元；可靠性；纤维增强材料 中图分类号：S784 15 The Reliability of Wood Structure Lumber Strengthened with GFRP ZHU Xiaodong, LIU Yu (Material science and technology School,Northeast Forstry University, Harbin 150040) 20 25 30 35 40 Abstract: Finite element analysis and vibration non-destructive test method were used to research the reliability of wood structure lumber strengthened with GFRP. The dynamic finite element analysis was established to study the effect of glass fiber thickness, size and quantity of glue on the MOE of Lumber. According to the prices of the raw materials and process, the best parameters were chose , the optimal parameters are as follows: glass fiber thickness 3mm, quantity of glue 125g / m2, veneer size 1/ 2 when reliability satisfies above 96% condition;the glass fiber thickness 10mm, quantity of glue 125g / m2, veneer size 1/ 2 when the reliability satisfies above 97% conditions. The reliability analysis results show that the probability of deflection less than 0.003L is 9% when the material under the 425N load, and reliability reached 53.8% after strengthened with glass fibe; the probability of deflection less than 0.005L is 71.6% when the material under the 425N load, and reliability reached 97.3% after strengthened with glass fiber. Keywords: wood science and technology; wood structure lumber; vibration non-destructive test; finite element; reliability; iber reinforced plastics 0 引言 随着人们生活水平的提高, 人们越来越重视木结构建筑的保护和修缮，并且由于建筑物 使用功能和荷载的改进，也使得木结构需要进行增强和加固[1-2]。传统加固方法可能会破坏 历史建筑的原有风貌，因施工时间过长影响正常使用不能广泛应用于木结构的维修加固中。 新型建筑材料-FRP 的出现，为木结构的加固带来了新的机遇[3-5]。纤维增强复合材料( Fiber Reinforced Plastics，简称 FRP