超薄壁冷弯型钢矩形截面钢管墙架柱-楼层梁连接抗震性能试验研究

发布时间：2018-04-24 04:42

  本文选题：超薄壁冷弯型钢 + 矩形截面墙架柱　； 参考：《建筑结构学报》2016年07期

【摘要】：冷弯薄壁型钢结构的墙架柱与楼层梁连接构成空间受力体系,考虑柱的轴压比和楼层连接处不同构造方式,对3组共6个矩形截面镀锌钢管墙架柱与楼层梁的连接试件进行了低周往复加载试验。研究结果表明:墙架柱的轴压比从0.2增加到0.4时,规程JGJ 227—2011推荐的连接构造试件的屈服、极限和破坏荷载较角钢加强型连接构造试件均降低约20%,但对角钢加强型连接影响较小;所有连接均发生延性破坏,极限状态时墙架柱损伤很小;柱轴压比对延性、耗能能力均有一定的影响,因此将未加强的连接用于多层房屋结构时,要引起足够重视;在角钢加强型连接中,角钢厚度对连接试件的承载力影响显著,故建议对多层冷弯薄壁型钢房屋中的墙架柱与梁连接,采用厚t≥2 mm的角钢,与规程JGJ 227—2011推荐的连接方式相比,其承载力明显提高,累积耗能能力及屈服耗能能力均较强,破坏前试验所经历的荷载循环级数增加。
[Abstract]:The connection between the wall frame column and the floor beam of the cold-formed thin-walled steel structure forms the spatial stress system, considering the axial compression ratio of the column and the different construction mode of the floor connection, The low cycle reciprocating loading tests were carried out on three groups of 6 rectangular section galvanized steel pipe wall columns connected with floor beams. The results show that when the axial compression ratio of the wall column increases from 0. 2 to 0. 4, the yield of the connection specimens recommended by JGJ 227-2011 is obtained. The limit and failure loads are about 20% lower than those of angle steel reinforced joint specimens, but have little effect on angle steel reinforced connections; all connections have ductile failure, and the damage of wall frame columns is very small when the limit state is limited, and the ductility of columns is reduced by axial compression ratio. The energy dissipation capacity has certain influence, so when the unstrengthened connection is used in the multi-story building structure, enough attention should be paid to it, and in the angle steel reinforced connection, the angle steel thickness has a significant effect on the bearing capacity of the connection specimen. Therefore, it is suggested that the angle steel with thickness t 鈮，

本文编号：1795220