不同截面冷弯薄壁型钢组合墙受剪性能

doi:10.13229/j.cnki.jdxbgxb.20240875

Abstract

Abstract:

In order to ensure that the structure has sufficient bearing capacity under horizontal forces such as wind loads and earthquakes， the shear performance of cold-formed thin-walled steel composite walls with different cross-sections is studied. Determine the basic parameters of materials for preparing cold-formed thin-walled steel composite walls， prepare three types of cold-formed thin-walled steel composite wall test samples： rectangular section， U-shaped section， and Z-section. Test the displacement and crack changes of each test sample under the loaded shear load， monitor the ultimate load and failure load of the test sample， verify the degradation changes of the bearing capacity of each test sample， and analyze the influence of screw spacing， steel thickness， and spacing on the shear resistance of the sample. The experimental results show that compared to the other two types of sections， the Z-shaped section cold-formed thin-walled steel composite wall has the smallest displacement change under load and shorter crack occurrence. When the screw spacing is 150 mm， the steel thickness is 50 mm， and the spacing is 60 mm， the shear performance of the composite wall is optimal.

Key words: cold-formed thin-wall steel, composite wall, shear performance, U-shaped section, Z-section, rectangular section

CLC Number:

TU391

Li-hong HAN,Yong-guo LIU. Sshear performance of cold-formed thin-wall composite steel walls with different sections[J].Journal of Jilin University(Engineering and Technology Edition), 2025, 55(10): 3221-3227.

Figures/Tables 11

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References 15

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参数	数值
屈服应力/MPa	322.27
弹性模量/GPa	161.28
屈服应变/%	0.19
破坏荷载/MPa	283.56
断裂伸长率/%	23.55

参数	刨花板参数	硅酸钙板参数
剪切弹性模量/MPa	1 459.83	1 448.72
抗压强度/MPa	26.94	16.12

参数内容	数值
规格/mm×mm×mm	42×15×1.5
屈服强度/MPa	330
抗拉强度/MPa	440
厚度/mm	15
断裂伸长率/%	33.92

开裂位置	内容	矩形试样	U型试样	Z型试样
试样底部开裂	位移/mm	37.28	22.46	4.28
	裂缝长度/mm	18.65	12.36	5.27
	裂缝宽度/mm	5.24	3.87	2.15
	刚度特征值	0.846	0.968	1.112
试样竖向开裂	位移/mm	35.94	20.17	5.12
	裂缝长度/mm	22.67	19.72	4.28
	裂缝宽度/mm	7.64	3.48	1.96
	刚度特征值	0.485	0.665	0.957
试样斜向开裂	位移/mm	34.76	21.65	2.67
	裂缝长度/mm	36.25	23.15	4.82
	裂缝宽度/mm	6.15	4.96	1.54
	刚度特征值	0.497	0.578	0.676

测试内容	矩形试样	U型试样	Z型试样
屈服荷载/kN	5.88	4.69	2.81
屈服位移/mm	19.57	7.21	3.51
极限荷载/kN	15.89	7.86	4.87
极限位移/mm	40.83	44.28	21.92
破坏荷载/kN	9.16	7.86	4.87
破坏位移/mm	44.28	41.92	21.83
延性系数	6.23	6.33	2.26
累计耗能能力/（kN·mm）	1 583	1 769	1 002

Sshear performance of cold-formed thin-wall composite steel walls with different sections

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