冷弯薄壁型钢双层组合墙体抗剪性能试验研究
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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。
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.
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.
引文
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[5]Huang Zhiguang,Su Mingzhou,He Baokang,et al.Shaking table test on seismic behaviors of three-story cold-formed thin-wall steel residential buildings[J].China Civil Engineering Journal,2011,44(2):72-81.[黄智光,苏明周,何保康,等.冷弯薄壁型钢三层房屋振动台试验研究[J].土木工程学报,2011,44(2):72-81.]
[6]中国国家标准化管理委员会.金属材料拉伸试验:GB/T228.1-2010[S].北京:中国标准出版社,2010.
[7]Wang Rong,Yao Yong,Chu Yunpeng.Wind-induced response numerical simulation of multilayer cold-formed and thin-walled steel structure under different wind angle[J].Building Science,2015(11):103-108.[王嵘,姚勇,褚云朋.不同风向角下多层冷弯薄壁型钢结构风致响应数值模拟[J].建筑科学,2015(11):103-108.]
[8]EKS.Recommended testing procedure for assessing the behavior of structural steel elements under cyclic loads[R].Brussels:ECCS Publishing,1986.
[9]中国住房和城乡建设部.建筑抗震试验方法规程:JGJ 101.1-1996[S].北京:中国建筑工业出版社,1997.
[2]Chen Wei,Ye Jihong,Xu Yang.Shear experiments of loadbearing cold-formed thin-walled steel wall system lined with sandwich panels[J].Journal of Building Structures,2017,38(7):85-92.[陈伟,叶继红,许阳.夹芯墙板覆面冷弯薄壁型钢承重复合墙体受剪试验[J].建筑结构学报,2017,38(7):85-92.]
[3]Ye Jihong,Zhou Zhiyong.Discussion on light steel construction and development[J].Journal of Harbin Institute of Technology,2016,48(6):1-9.[叶继红,周志勇.多层轻钢房屋建筑结构-轻钢龙骨式复合剪力墙结构体系研究进展[J].哈尔滨工业大学学报,2016,48(6):1-9.]
[4]Li Yuanqi,Liu Fei,Shen Zuyan,et al.Shaking table test on a full-scale model of low-rise high-strength cold-formed thinwalled steel framing buildings[J].Journal of Building Structures,2013,34(1):36-43.[李元齐,刘飞,沈祖炎,等.高强超薄壁冷弯型钢低层住宅足尺模型振动台试验[J].建筑结构学报,2013,34(1):36-43.]
[5]Huang Zhiguang,Su Mingzhou,He Baokang,et al.Shaking table test on seismic behaviors of three-story cold-formed thin-wall steel residential buildings[J].China Civil Engineering Journal,2011,44(2):72-81.[黄智光,苏明周,何保康,等.冷弯薄壁型钢三层房屋振动台试验研究[J].土木工程学报,2011,44(2):72-81.]
[6]中国国家标准化管理委员会.金属材料拉伸试验:GB/T228.1-2010[S].北京:中国标准出版社,2010.
[7]Wang Rong,Yao Yong,Chu Yunpeng.Wind-induced response numerical simulation of multilayer cold-formed and thin-walled steel structure under different wind angle[J].Building Science,2015(11):103-108.[王嵘,姚勇,褚云朋.不同风向角下多层冷弯薄壁型钢结构风致响应数值模拟[J].建筑科学,2015(11):103-108.]
[8]EKS.Recommended testing procedure for assessing the behavior of structural steel elements under cyclic loads[R].Brussels:ECCS Publishing,1986.
[9]中国住房和城乡建设部.建筑抗震试验方法规程:JGJ 101.1-1996[S].北京:中国建筑工业出版社,1997.