栓钉用量对大长宽比型钢混凝土短柱抗震性能影响研究

Study on the stud amount impact on the seismic performance of steel-reinforced concrete short column with large length-width ratio

为研究栓钉用量对大长宽比型钢混凝土短柱抗震性能的影响,对不同栓钉用量的3个型钢混凝土短柱进行抗震性能试验研究。研究结果表明:增加栓钉的用量对型钢混凝土短柱的水平承载力影响不大,但可增加型钢与混凝土之间的摩擦耗能面积,提高构件的耗能能力;此外,不论栓钉设置与否,型钢混凝土短柱均具有良好的延性和塑性变形能力,但栓钉用量的增加会加剧构件裂缝发展,降低构件延性。因此,建议型钢混凝土短柱设计时,可适当放宽栓钉用量,间距100mm以上为宜。

In order to study the stud amount impact on the seismic performance of steel-reinforced concrete short column（ SRC short columns） with large length-width ratio,seismic performance experiments on three SRC short columns with different stud amounts were carried out. The results show that stud amount has little impact on the horizontal bearing capacity of SRC short columns,but can increase the friction contact area to enhance its energy-dissipating capacity. With or without studs,all the SRC short columns have good ductility and plastic deformation capacity,but the increase of studs can accelerate column crack development and decrease its ductility. So,it is suggested that the studs should be set in the SRC short columns in moderate amount,with 100 mm distance above.