实腹式型钢混凝土异形柱边框架拟静力试验及有限元分析

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。

Quasi-static test and finite element analysis on solid-web steel reinforced concrete exterior frame with special-shaped columns

In order to study the seismic behavior of solid-web steel reinforced concrete exterior frame with special-shaped columns, an experiment of two-bay and three-story frame with 1/2.5 scale under low cyclic reversed loading was conducted. The load-displacement hysteretic loops, inter-story drift, ductility, energy dissipation of the frame were analyzed. The results show that its load-displacement hysteretic loops are in plump-shape, and the frame has excellent seismic behavior. Based on the experimental research, finite element analysis software ABAQUS was used to simulate the properties of specimens. The calculation results agreed with the results of test very well. The maximum deviation of the peak load of the solid-web steel reinforced concrete exterior frame with special-shaped columns and its corresponding displacement were 3.31% and 12.96% respectively. The stiffness was higher than the test result. The factors affecting the P-Δcurve of the frame were analyzed. The results show that: with the increase of the axial compression ratio, the horizontal load-bearing capacity of the frame is reduced, and the ductility is lower. With the limb height-thickness ratio and the yield moment ratio of the beams and columns increasing, the horizontal load-bearing capacity and the initial stiffness of the frame are improved, while the ductility of the frame tends to decrease. With the increase of concrete strength and the yield strength of steel, the horizontal load-bearing capacity of the frame is improved. But the material strength has no significant effect on the ductility.