摘要
结构保温板(structural insulated panels,SIP)作为建筑构件具有轻质高强、保温隔声性能好等优点,但因木材资源缺乏,其应用受到限制。为寻求更广泛的原料来源,引入两种竹质板材竹帘胶合板和重组竹,测定以木质定向刨花板、竹帘胶合板和重组竹覆面的SIP板式结构的拉伸黏结强度、抗剪强度及过梁弯曲性能。结果表明:三者的拉伸黏结强度分别为0.157,0.150和0.059MPa,前两者符合JGJ 144—2004中对聚苯乙烯泡沫板现浇混凝土外墙外保温系统现场黏结强度的要求,而重组竹覆面板材低于限定值;抗剪强度分别为0.096,0.078和0.062 MPa,过梁抗弯强度分别为2.87,4.04和0.66 MPa。为提高重组竹的拉伸黏结强度,应注意避免材料制作过程中的热伤害;为提高其过梁抗弯性能,当开设洞口作为过梁使用时,可以考虑改变覆面重组竹的竹束走向,以避免载荷对板材连接强度较弱界面的应力集中。
As a building component, structural insulated panel （SIP） has advantages of light weight, high intensity, excellent thermal and sound insulation, while its application was limited by the shortage of wood resources. In an attempt to seek broad sources for the building material, two types of bamboo-based panels （ bamboo scrimber and bam- boo plywood） were used to evaluate the possibility of SIP in the building application. The tensile bond strength, shear strength and lintel flexural performances of SIP shelled with wooden oriented strand board （OSB）, bamboo plywood and bamboo scrimber were tested according to the ISO 22452：2011 standard. The results showed that the tensile bond strength of SIP shelled with wooden OSB, bamboo plywood and bamboo scrimber were 0. 157, 0. 150 and 0. 059 MPa, respectively. The former two could satisfy the requirements of JGJ 144-2004 standard, in which the tension bond strength requirement of expanded polystyrene was 0.10 MPa, while the tensile bond strength of SIP shelled with bamboo scrimber was lower than the requirement. The shear strengths were 0.096, 0.078 and 0.062 MPa, respectively, and lintel flexural performances were 2.87, 4.04 and 0.66 MPa, respectively. The SIP shelled with bamboo scrimber had lower tension bond strength because bamboo scrimber has a higher heat transfer coefficient than that of wooden OSB and bamboo plywood. In order to improve the tension bond strength, the thermal damage should be avoided in the manufacture process. The SIP shelled with bamboo scrimber also had a lower flexural behavior because the bamboo scrimber was glued together along the loading direction, and therefore it was difficult to make a perfect product. In order to improve the flexural behavior when SIP is used as lintel, the bamboo bundle direction should be adjusted to avoid stress concentration on the weak interface.
出处
《林业工程学报》
北大核心
2017年第3期16-21,共6页
Journal of Forestry Engineering
基金
"十三五"国家重点研发计划(2016YFD0600702)
南京林业大学高层次人才科研启动基金(GXL1023)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
结构保温板
覆面板
拉伸黏结性能
剪切性能
过梁抗弯性能
structural insulated panels
face panel
tensile bond strength
shear strength
lintel flexural performance
