冷弯薄壁方钢管-稻草板组合墙体轴压性能  

Axial Compression Performance of Cold-formed Thin-walled Square Steel Stud-Straw Board Composite Wall

作　　者：张秀华[1] 张恩源 于灏 兰士承 张华鹏 ZHANG Xiu-hua;ZHANG En-yuan;YU Hao;LAN Shi-cheng;ZHANG Hua-peng(College of Civil Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学土木工程学院,哈尔滨150040

出　　处：《科学技术与工程》2021年第1期283-289,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51878130);国家级大学生创新创业训练计划项目(201910225133)。

摘　　要：为研究冷弯薄壁方钢管与纸面稻草板(稻草板)组成的组合墙体的轴压性能,对三面组合墙体试件进行轴心受压试验,得到组合墙体的轴心受压承载力和破坏模式。试验结果表明,组合墙体的破坏模式是钢管端部屈曲破坏、稻草板局部发生褶皱和弯曲。方钢管和稻草板协同工作性能良好,稻草板对方钢管起到了良好的约束作用,组合墙体承载力较高。采用有限元软件ANSYS对组合墙体进行非线性分析,数值分析结果与试验结果吻合较好。在此基础上,利用有限元模型分析了钢管壁厚、墙体高厚比及自攻螺钉间距对组合墙体承载能力的影响,提出了该组合墙体轴压承载力计算公式。计算结果表明,该公式能很好地计算组合墙体承载能力。In order to observe the axial compressive behavior of the composite walls composed of cold-formed thin-walled square steel studs and paper straw boards(straw board),three specimens were tested under axial compressive loads.Axial compressive bearing capacity and failure mode were investigated.Experimental results show that the failure modes of the walls are local buckling at stud ends and the wrinkling and bending of straw boards.The steel studs and the straw boards work well together.The straw boards play a good role in restraining the steel studs,so that the walls possess a higher bearing capacity.The finite element software ANSYS was used for nonlinear analysis of the walls,and the numerical analysis results were in good agreement with the experimental results.On the basis,the influence of the thickness of the steel studs,the height-to-thickness ratio of the steel studs and the spacing of the self-tapping screws on the bearing capacity of the walls were analyzed by using the finite element model,and the formula were proposed to calculate the axial bearing capacity of the walls.The results show that the formula works well in calculating the bearing capacity of the walls.

关 键 词：冷弯薄壁型钢组合墙体 纸面稻草板 轴心受压试验 承载力 

分 类 号：TU398.9[建筑科学—结构工程]