L形无孔钢板连接式方钢管混凝土组合异形柱压弯性能简化模拟研究

对2根偏心距不同的L形无孔钢板连接式方钢管混凝土组合异形柱进行压弯简化模拟研究,并对简化模型及实体模型进行了破坏模态、竖向承载力、侧向位移3方面的对比,结果表明:简化模型基本能够合理有效地模拟L形无孔钢板连接式方钢管混凝土组合异形柱的压弯性能;在简化模型的基础上,对异形柱的压弯性能进行了参数化分析,分析发现提高钢材强度能有效改善柱承载力,提高混凝土强度、连接板厚度对柱承载力及延性没有明显影响,柱承载力会随着偏心距的增加而不断下降,且下降程度不断减小。

Simplified simulation study on compression-bending behavior of L-shaped special-shaped concrete-filled square steel tubular composite columns connected with non-porous steel plates

Simplified simulation study was carried out on compression-bending behavior of two L-shaped special-shaped concrete-filled square steel tubular composite columns connected with non-porous steel plates of different eccentricities. The comparison of failure modes, vertical bearing capacity and lateral displacement between the simplified model and the solid model was made. The results show that the simplified model can reasonably and effectively simulate the compression-bending behavior of special-shaped concrete-filled square steel tubular composite columns with non-porous steel plates. On the basis of simplified model, the parametric analysis of the compression and bending performance of special-shaped columns was carried out to find that increasing steel strength can effectively improve the bearing capacity of columns. The improving concrete strength and the thickness of connection plate has no obvious influence on the bearing capacity and ductility of columns. The bearing capacity of columns decreases with the increase of eccentricity, and the degree of decline decreases.