十字形型钢混凝土异形柱抗震性能研究

THE STUDY ON SEISMIC BEHAVIOR OF CROSS-SHAPED COLUMNS OF STEEL REINFORCED CONCRETE

通过对8根十字形型钢混凝土异形柱进行低周往复模拟,得到相应的滞回曲线、骨架曲线和刚度退化曲线,分析轴压比、混凝土等级、型钢偏移、荷载施加角度、含钢率等因素对十字形异形柱抗震性能的影响。结果表明:随着混凝土强度以及含钢率增加,强度衰退较慢,耗能增加,抗震性能提高。提高轴压比,试件承载力提高,但是延性及耗能变差,抗震性能下降。工字钢位置距各肢边缘越近,受力时能充分发挥能力,有利于抗震。另外,采用0°加载及采用方钢管均有利于试件抗震。

Eight cross-shaped steel reinforced concrete special-shaped columns were subjected to low-cycle reciprocating simulation to obtain the corresponding hysteretic curve, skeleton curve and stiffness degradation curve, and the axial compression ratio, concrete grade, profile steel deflection, load application angle, steel ratio, etc. were analyzed. Influence of Factors on Seismic Performance of Crossshaped Special-shaped Columns. The results show that as the strength of concrete and the percentage of steel increase, the strength declines slowly, the energy consumption increases, and the seismic performance increases. When the axial compression ratio is increased, the bearing capacity of the specimen increases, but the ductility and energy consumption deteriorate, and the seismic performance decreases.The position of the I-beam is closer to the edge of each limb, and when it is stressed, it can fully exert its ability, which is beneficial to earthquake resistance. In addition, the use of 0 ° loading and the use of square steel pipe are conducive to the seismic test pieces.