复式钢管混凝土抗震性能有限元分析

Finite Element Analysis of Seismic Performance of Compound Concrete Filled Steel Tube

建立外方内圆带肋中空夹层钢管混凝土在轴向压力及水平往复荷载共同作用下的有限元分析模型,研究构件的抗震性能,发现单调P-Δ曲线能够较好地反应出滞回曲线的骨架曲线的特点,进一步研究发现增设加劲肋提高了构件的抗震性能,其变形及耗能能力均优于普通中空夹层钢管混凝土。

The finite element analysis model of concrete filled double-skin steel tube with outer square and inner circular ribs under the combined action of axial pressure and horizontal reciprocating load is established to study the seismic performance of the members. It is found that the monotonic P-Δ curve can better reflect the characteristics of the skeleton curve of the hysteretic curve. It is further found in the research that the seismic performance of the members is improved by adding stiffening ribs, and their deformation and energy dissipation capacity are all superior to that of ordinary concrete filled double-skin steel tube.