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为研究实腹式型钢混凝土异形柱边框架的抗震性能,对1榀缩尺比为1/2.5的两跨三层框架模型进行低周反复荷载试验,对其滞回曲线、层间位移角、延性及耗能进行了分析,结果表明,该框架滞回曲线饱满,抗震性能好。在试验研究的基础上,利用ABAQUS软件对试件进行了有限元模拟,并将计算结果与试验结果进行对比,结果显示,两者较为符合。实腹式配钢型钢混凝土异形柱边框架极限荷载较试验值偏大3.31%,极限荷载对应的位移较试验值偏小12.96%,刚度较试验值高。对P-Δ曲线的影响因素进行了分析,结果表明:随着轴压比的增大,框架的水平承载力降低,延性降低。增大肢高肢厚比、梁柱屈服弯矩比,能够较大地提高框架的水平承载力和初始阶段的刚度,但框架的延性有减小的趋势。随着混凝土强度、型钢屈服强度的增大,框架的水平承载力提高,但位移延性没有明显变化。
In order to study the seismic behavior of CFRP special-shaped column frame, a low-cycle cyclic loading test was carried out on a two-span three-layer frame model with a 1/2 scale ratio of 1 / 2.5. Hysteresis curves, Ductility and energy consumption were analyzed. The results show that the hysteresis curve of the frame is full and the seismic performance is good. On the basis of the experimental study, the finite element simulation of the specimen was carried out by ABAQUS software, and the calculated results were compared with the test results. The results show that the two are in line with. The ultimate load of the frame with special-shaped steel-filled steel reinforced concrete special-shaped columns was 3.31% larger than the test value. The displacement corresponding to the ultimate load was 12.96% smaller than the test value, and the stiffness was higher than the test value. The influencing factors of P-Δ curve are analyzed. The results show that with the increase of axial compression ratio, the horizontal bearing capacity of the frame decreases and the ductility decreases. Increasing the height-to-thickness ratio of the limbs and the bending moment ratio of the beam and column can greatly increase the horizontal bearing capacity and initial stiffness of the frame, but the ductility of the frame tends to decrease. With the increase of concrete strength and yield strength, the horizontal bearing capacity of the frame increases, but the displacement ductility has no obvious change.