外置钢管补强圆形钢桥墩非线性有限元分析

Nonlinear Finite Element Analysis for Tubular Steel Pier Reinforced with Outer Steel Tube

通过采用MARC有限元程序对外置钢管补强的7个圆柱形试件进行非线性数值分析,得到了在一定垂直荷载和往复水平荷载的作用下非线性荷载与位移的关系曲线,并考察了钢管的径厚比、桥墩柱的长细比对外置钢管补强圆形钢桥墩的延性、承载力和吸收能量的影响。结果表明:数值分析与试验结果较为吻合,外置钢管补强圆形钢桥墩具有良好的抗震性能。

The curve that shows the relation between nonlinear load and displacement under effect of certain vertical load and repeated horizontal load is obtained by doing nonlinear numeric analysis on seven cylindrical specimens reinforced with outer steel tube with MARC, a finite element program. Impact of diameter-thickness ratio of steel tube and slenderness ratio of pier on extension, bearing capacity and energy absorbing of steel pier is studied as well. The result indicates that the results of numeric analysis and test match well, steel pier reinforced with outer steel tube has good seismic performance.