碳纤维钢骨-钢管混凝土柱非线性有限元分析

Nonlinear FEM Analysis on CFRP Steel Reinforced Concrete Filled with Steel Tube Concrete Column

目的为了对实体试验提供理论依据,对碳纤维钢骨—钢管混凝土柱在不同参数下的承载力进行有限元分析.方法借助大型通用有限元分析软件ABAQUS,合理选取材料的本构关系,建立试件模型,确定单元类型,得到不同参数作用下,试件的荷载—位移曲线;根据得到的曲线和数据,对试件承载力进行分析.结果单独增大钢管直径、碳纤维层数或内外混凝土的强度,试件的承载力均得到提高;而增大轴压比,试件的承载力降低;仅提高内混凝土强度等级,试件承载力增大不明显.结论用碳纤维加固与不用碳纤维相比,试件所能承受的最大荷载有了明显地提高,并且碳纤维层数越多,试件所能承受的最大荷载越大.碳纤维钢骨-钢管混凝土柱具有较高的承载力.

In order to provide reference for the experiment, this paper makes the nonlinear finite dement analysis on CFRP steel reinforced concrete filled with steel tube concrete column by using ABAQUS to analyze the load bearing capacity of this column under five different parameters. The load-displacement curves of each specimen under five different parameters are acquired by establishing model, choosing constitutive relationship and making unit types;analyze the influence of different axial force ratio on each specimen. On the basic of these curves,it shows load bearing capacity of the specimen can be enhanced only with the in- creasing of diameter of steel tube or CFRP layer or strength of concrete; however, it will be reduced with the increasing of axial compression ratios;load bearing capacity of the specimen changed little only with the increasing of strength of inside concrete. The bearing capacity of specimen with CFRP is bigger than that without CFRP, and with the increasing of CFRP layers, beating capacity of specimen increases. CFRP steel reinforced concrete filled with steel tube concrete column has bigger bearing capacity.