| Concrete-Filled Steel Tube is a type of composite structure material that the concrete is filled into thin-wall steel circular steel tube. CFST superior carrying load capacity and easier execution of working than other structure, so the study of CFST further becomes a hot study field. Now the construction structure is required have longer span,higher attitude and have the ability to carry over-loading, and column will burden more load .Investigation of project accident shows that the design of the columns that support the structure is the key to prevent collapse, so columns are required to not only have the high ability to carry load, but also possess good duetility to avoid collapse.The paper analysis some behavior in loads of different compression about concrete filled in the steel tube structure. The paper make analysis about Influencing regularities of many factors and give limitation of some factors , and some good conclusions are given. In the paper ,the ultimate load of CFST compression structure was calculated according to china cods about CFST, the calculated results are compared with the test results and each other, some useful conclusion was drawn to carry out the codes in practice. The paper analysis behavior of limit bearing capacity though analysis behaviors under loads of axial compression and part compression based on some conclusions of tests and theoretic .The paper made numerical simulation analysis of the test about the bigger slenderness ratio column under axial compression by finite element software .some behavior in loads of compression and Limit bearing capacity about is given , By comparing theoretical value with experimental results, the former is fit well with latter. It shows that research of CFST by finite element analysis software is correct. the paper make analysis about two type local compression of CFST,method for bearing strength calculation and limitation of the Coefficients—β. |
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