论文部分内容阅读
利用我国竹资源优势,发挥竹材人造板优良的力学性能,提出一种新型的组合结构——冷弯薄壁C型钢-竹胶板组合楼板,即两张竹胶板间按一定间距布置两根冷弯薄壁C型钢,型钢与竹胶板界面用结构黏合剂黏结。结合冷弯薄壁型钢的截面特点,通过型钢与竹板单纯胶结、自攻螺钉约束及抗侧竹板加固等组合构造方式,对6块简支的组合楼板进行抗弯性能试验,探讨组合楼板在受弯条件下的整体工作性能、破坏特征、抗弯刚度及极限承载力等。结果表明,在保证构件制作精度及黏结质量的条件下,有侧板的复合胶结型组合楼板与单纯黏胶及无侧板的复合胶结型的两种楼板相比,刚度、承载力等抗弯性能指标均有大幅提高,整体性能好,组合效应突出;根据组合楼板中钢板及竹板的荷载-应变变化,提出组合楼板刚度及承载力的力学模型及计算方法,据此得到的组合楼板挠度及承载力计算值与试验值吻合较好。
Take advantage of the advantages of bamboo resources in our country, give play to the excellent mechanical properties of bamboo wood-based panels, and propose a new type of composite structure - cold-formed thin-walled C-section steel-bamboo composite panels, that is, two bamboo- Cold-formed thin-walled C steel, steel and bamboo adhesive bonding with structural adhesive. Combined with the cross-section characteristics of cold-formed thin-walled section steel, the flexural performance of six simple-supported composite slabs was tested by the combination of simple cementation of steel plate and bamboo plate, self-tapping screw restraint and anti-side bamboo plate reinforcement, Under the conditions of bending the overall performance, damage characteristics, bending stiffness and ultimate bearing capacity. The results show that under the condition of ensuring the precision and bonding quality of the components, compared with the two kinds of composite floor with the composite adhesive-type composite floor and the simple adhesive and without side panels, the bending resistance, The performance indexes are greatly improved, the overall performance is good, and the combination effect is outstanding. According to the load-strain changes of the steel plates and bamboo plates in the composite floor, the mechanical model and calculation method of the composite floor stiffness and bearing capacity are proposed. And the calculated value of bearing capacity is in good agreement with the experimental value.