【摘要】 为研究冷弯薄壁型钢-纸面稻草板组合墙体力学性能,对4面冷弯薄壁型钢-纸面稻草板组合墙体试件进行了单调水平抗剪性能试验。分析了各试件破坏形态和破坏过程,得到组合墙体的屈服荷载、极限荷载及延性系数、抗侧移刚度等性能指标。研究结果表明:冷弯薄壁型钢与纸面稻草板通过自攻螺钉连接组合方式合理,组合效应良好;组合墙体经历弹性、弹塑性、破坏三个阶段,其主要破坏模式为边立柱底部局压屈曲,部分纸面稻草板在螺钉孔处被撕裂;组合墙体具有较大的抗剪承载力,延性系数和抗侧移刚度等指标表现良好;施加上部竖向荷载使组合墙体抗剪承载力降低,带有斜撑的组合墙体能够显著提高抗剪承载力。该组合墙体抗剪承载力和抗侧移刚度对于实际工程具有参考意义。更多还原

【Abstract】 In order to study the mechanical properties of the cold-formed thin-walled steel-straw board composite walls, a monotonic shear performance test was carried out on 4 cold-formed thin-walled steel-straw board composite wall specimens. The failure modes and failure processes of each specimen were analyzed. The performance indexes such as yield load, ultimate load and ductility coefficient, and lateral stiffness of the composite wall were obtained. The results indicated that the combination formation of cold-formed thin-walled steel-straw board with self-tapping screws connecting was reasonable and the combination effect was good. The composite wall underwent three stages of elasticity, elastoplasticity and failure. The main failure mode was local buckling at the bottom of side studs, and the straw board was torn at the screw holes. The composite wall had a large shear capacity, and the ductility coefficient and the anti-lateral stiffness performance were good. Applying the upper vertical load reduced the shear capacity of the wall, and the composite wall with braces can significantly increase the shear capacity. Some suggestions were presented for practical engineering application, including shear bearing capacity and lateral stiffness of the composite wall.更多还原