圆端形钢管混凝土双肢塔柱受力性能试验研究

Analysis of Mechanical Properties of Round-ended Concrete Filled Steel Tubes Coupled Column

采用有限元方法,在不考虑钢管-混凝土相互作用的基础上,对某斜拉桥圆端形钢管混凝土双肢柱在轴心受压和偏心受压两类工况下的受力状况进行数值模拟分析。然后,结合某斜拉桥主塔双肢塔柱应力监测实验数据,与有限元模拟数据进行对比。两者结果吻合良好,表明所采用的有限元模型是合理的。分析结果表明,相比于普通钢管混凝土结构,圆端形钢管混凝土双肢柱具有承受大偏心荷载的性能。

By finite element method, without considering steel tube and concrete interaction, the mechanical performance of round - ended concrete filled steel tubes coupled tower - column was analyzed in axial compression and eccentric compres- sion. Then, the experimental values of a cable stayed bridge were compared with the FEA values by the finite element simula- tion. The results indicated that the experimental values agreed well with the results of finite element method and the finite el- ement model was reasonable. The results showed that compared with general concrete filled steel tube single limb, the round - ended concrete filled steel tubes coupled column could bear large eccentric load. The study played an important role in the de- sign and application of the round- ended concrete filled steel tubes.