预加载钢管混凝土柱受压有限元分析方法

Finite element analysis method for preload concrete filled steel tube columns under compression

钢管混凝土结构由于其具有良好的工作性能而被广泛地应用,但在其使用过程中,由于施工原因会使得钢管或混凝土提前产生一个初应力的作用,这个初应力会使得钢管混凝土柱的受压性能降低,为了提高钢管混凝土柱的受压性能,可以主动地添加一个组件或施加预荷载,增加其受力性能。因此,为了定量地比较不同预荷载情况下钢管混凝土柱的受力性能,通过对不同预加载情形进行有限元分析,提出在ABAQUS中适合施加预荷载的方式,并验证其可行性。

Steel tube concrete structures are widely used due to their excellent working performance.However,during their use,due to construction reasons,the steel tube or concrete will generate an initial stress in advance,which will reduce the compressive performance of the steel tube concrete column.In order to improve the compressive performance of the steel tube concrete column,a component can be actively added or preload to increase its mechanical performance.Therefore,in order to quantitatively compare the mechanical performance of steel tube concrete columns under different preload conditions,a suitable method for applying preload in ABAQUS was proposed through finite element analysis of different preload conditions,and its feasibility was verified.