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工程科学与技术:2019,51(2):45-52,70
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冷弯薄壁型钢双层组合墙体抗剪性能试验研究
(1.西南科技大学 土木工程与建筑学院,四川 绵阳 621010;2.兰州理工大学 土木工程学院,甘肃 兰州 730050)
Shearing Experiments of Cold-formed Steel Thin-wall Panels Under Cyclic Load
(1.College of Civil Eng. and Architecture, Southwest Univ. of Sci. and Technol., Mianyang 621010, China;2.College of Civil Eng., Lanzhou Univ. of Technol., Lanzhou 730050, China)
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投稿时间:2018-03-06    修订日期:2018-06-20
中文摘要: 冷弯薄壁型钢结构房屋中组合墙体具有较好的抗剪性能,当应用于双层组合墙体中时其薄弱部位位于楼层连接处,成为往复荷载作用破坏的薄弱部位。考虑不同墙体轴压力、不同抗拔锚栓类型,共对3组9片双层墙体进行抗剪性能试验。研究结果表明:墙体的耗能能力及延性均比单片墙体差,多发生沿楼层连接处的面外失稳或楼层梁的压屈破坏;楼层连接处构造成为此类结构承载的关键,层内拉条对提高双层墙体抗剪承能力作用不明显。楼层连接处发生平面外位移,刚度及承载力会突然陡降,且随轴压力增大试件发生平面外随机性失稳增大,仅通过采用撑杆增加楼层竖向抗压能力,对提高墙体平面外稳定作用不明显;双螺帽抗拔锚栓对提高墙体承载力作用明显,建议此类多层房屋楼层连接处采用此类锚栓,能有效提高墙体抗剪能力。
Abstract:Composite wall in the cold-formed thin-walled steel structure house has a good shear performance. When the double-layer composite wall is applied, the weak part is located at the floor connection, which becomes the failure under reciprocating loads. Considering the axial pressure of different walls and different types of anchor bolts, a total of 9 double-storey wall in three groups were tested for shearing performance. The research results showed that the energy consumption and ductility of the wall are worse than the single wall. The out-of-plane instability of the joints along the floors or buckling failure of the floor beams often occur, and the construction of the floor joints is the key to the bearing of structures. The effect of the inner layer of the strip on the shear capacity of the double wall is not obvious. The out-of-plane displacement occurs at the floor joint, the stiffness and bearing capacity will suddenly drop, and the random out-of-plane instability will increases with the increase of the axial pressure. It is not obvious to improve the out-of-plane stability of the wall only by using struts to increase the vertical compressive capacity of the floor. Double-nuts anti-pulling bolt has obvious effects on improving the bearing capacity of the wall. It was suggested that this kind of anchor bolt could be used at the floor connection of such multi-storey buildings, which can effectively improve the shear resistance of walls.
文章编号:201800234     中图分类号:TU318    文献标志码:
基金项目:国家自然科学基金资助项目(51508482);四川省科技支撑计划项目资助(2016GZ0318)
作者简介:褚云朋(1979-),男,博士生,副教授.研究方向:结构工程.E-mail:chuyunpeng@swast.edu.cn
引用文本:
褚云朋,王秀丽,姚勇.冷弯薄壁型钢双层组合墙体抗剪性能试验研究[J].工程科学与技术,2019,51(2):45-52,70.
CHU Yunpeng,WANG Xiuli,YAO Yong.Shearing Experiments of Cold-formed Steel Thin-wall Panels Under Cyclic Load[J].Advanced Engineering Sciences,2019,51(2):45-52,70.