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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。
Cold-formed thin-walled steel wall columns and floor beams connected to form a space force system, taking into account the column axial pressure ratio and floor connections at different structures, the three groups of 6 rectangular section of galvanized steel pipe wall column and floor Beam connection specimens were low cycle reciprocating loading test. The results show that the yield stress, ultimate load and failure load of JGJ 227-2011 recommended joint construction specimens are all reduced by about 20% compared with those of the angle steel reinforced connection structure when the axial compression ratio of the wall column is increased from 0.2 to 0.4. But the diagonal steel reinforced connection less affected; all connections are ductile damage, the limit state wall column damage is small; column axial pressure ratio of ductility, energy consumption have a certain impact, so the connection will not be strengthened with In the multi-story building structure, attention should be paid enough; in the case of angle steel reinforced connection, the thickness of the angle steel has a significant influence on the bearing capacity of the connection specimen. Therefore, it is suggested that the wall column and the beam in the multi-story cold- , Using angle steel with thickness≥2 mm, the bearing capacity is obviously improved compared with that recommended by the code JGJ227-2011, the cumulative energy dissipation capacity and yield energy capacity are both strong, and the load cycle experienced before the failure test The series has increased.