【摘要】 目的研究内置钢板冷弯薄壁型钢-纸面稻草板组合墙体的轴压力学性能,弥补填充混凝土等材料造成自重过大以及型钢-纸面稻草板组合墙体抗侧刚度低的缺陷。方法对3面组合墙体进行单调竖向加载轴压试验,得到组合墙体的受力过程、破坏形式、荷载位移-曲线及荷载-应变曲线;组合墙体的破坏模式是冷弯薄壁C型钢立柱局部屈曲破坏、纸面稻草板局部出现褶皱和钢板局部屈曲,通过试验数据分析,得到组合墙体轴心受压承载力、延性系数、刚度。结果结果表明:内置钢板厚度及内置钢板面数对组合墙体的竖向承载力、刚度和延性均有较大的提升;纸面稻草板对钢骨架起到了良好的约束作用。结论冷弯薄壁C型钢、纸面稻草板和钢板协同工作性能良好,可应用于单层或低层建筑工程中。更多还原

【Abstract】 In order to study axial compression mechanical properties of cold-formed thin-walled steel-paper straw board composite wall with built-in steel plate, and make up for the defects of the excessive self-weight caused by filling concrete and low lateral stiffness, monotonic vertical loading axial compression test on three composite wall specimens were conducted.The loading process, failure modes, load-displacement curves and load-strain curves of composite wall were obtained.The failure modes of composite wall are local buckling failure of cold-formed thin-walled C-section steel stud, local wrinkles of paper straw board and local buckling of steel plate.Through the analysis of test data, the axial compression bearing capacity, ductility coefficient and stiffness of composite wall were calculated.The experimental results show that the thickness and number of built-in steel plate have a great improvement on the vertical bearing capacity, stiffness and ductility of composite wall.The paper straw board has a good restraint effect on cold-formed steel frame.In addition, the cold-formed steel frame, straw board and steel plate can work well together, and composite wall can be used in single or low rise building.更多还原