中文摘要：

本文提出了一种在冷弯薄壁型钢骨架区格内放置聚苯乙烯泡沫板,并在型钢骨架一侧喷涂轻质砂浆,另一侧连接硅酸钙板的新型复合式冷弯薄壁型钢墙体。通过对无支撑和有交叉钢带支撑骨架形式的2个复合式冷弯薄壁型钢墙体足尺试件进行低周反复加载试验,分析了墙体的受力过程和破坏模式,并对试件的滞回性能、承载能力、延性、刚度退化以及承载力退化等抗震性能指标进行了研究。试验结果表明：复合式冷弯薄壁型钢墙体的主要破坏模式为硅酸钙板与型钢骨架之间的螺钉连接失效,边立柱底部的局部受压屈曲以及轻质砂浆与型钢骨架之间的黏结滑移。轻质砂浆、硅酸钙板与型钢骨架之间的相互作用使得复合式冷弯薄壁型钢墙体具有较高的承载能力和良好的延性。交叉钢带支撑的设置增加了墙体的受剪承载力,抑制了砂浆层的开裂,但增加了边立柱的轴向压力,结构的延性有所降低。

英文摘要：

This paper presents a new-type of cold-formed thin-wail steel composite wails in which polystyrene boards are placed in the region of the cold-formed thin-wail steel frame and sprayed lightweight mortar and calcium silicate boards are used on each side of steel frames. Through tests of two specimens of cold-formed thin-wail steel composite walls with no braces and X-shaped steel strap braces respectively under low reversed cyclic loading, the failure process and pattern were analyzed. The mechanical characteristics such as hysteretic behavior, bearing ca- pacity, ductility, stiffness degradation and strength degradation were researched. The results indicate that the main damage modes of cold-formed thin-wall steel composite walls are the failure of screw connections to steel frames and calcium silicate boards, local compressive buckling at the bottom of side studs and the slip between the steel frames and lightweight mortar outside the frame of the wall. Cold-formed thin-wall steel composite walls have great bearing capacity and improved ductility owing to the interaction between lightweight mortar, calcium silicate boards and steel frames. The installation of X-shaped steel strap braces leads to the increase of the shear capacity, the inhibi-tion of wall cracking and relatively lower ductility as increasing the axial loading of side studs.