| The structure stainless steel-concrete-steel tubular components is a new combined structure developed on the basis of the traditional concrete filled double-skin steel tubular.This kind of combined structure not only inherits the advantages of high bearing capacity,good toughness,good fire resistance,high bending rigidity and light weight,but also has good corrosion resistance and durability for the reason of stainless steel.And it can be widely used in structures such as cross-sea bridge structures and offshore platforms that require high resistance to corrosion.In this paper,the theory and method for analyzing structural stressing state are used to analyze the combined structure in axial compression,eccentric pressure and pure flexural.The corresponding finite model is established and an attempt is made to construct a structural stressing state mode based on simulated data.Finally,the parameter analysis is carried out and the formulas are formed to predict the failure loads and ultimate loads through fitting the experimental and simulative data.The main research contents are as follows:(1)The axial compression performance of components is analyzed based on the structure stressing state theory.First,the structure stressing state characteristic curve of generalized strain energy density is constructed and the Mann-Kendall criterion is introduced to distinguish the failure load.Then,the finite model is established and the stress nephogram is analyzed.The structural stressing state mode is constructed based on simulated data.Finally,the parameter analysis is carried out and the formulas are formed to predict the failure loads and ultimate loads.(2)The eccentric compression performance of components is analyzed based on the structure stressing state theory.First,the finite model is established and its' rationality is verified by experimental data.Then,the stress nephogram is analyzed and the structural stressing state mode is constructed based on simulated data.Finally,the parameter analysis is carried out and the formulas are formed to predict the failure loads and ultimate loads.(3)The pure bending performance of components is analyzed based on the structure stressing state theory.First,the structure stressing state characteristic curve of generalized strain energy density is constructed and the Mann-Kendall criterion is introduced to distinguish the ultimate bending moment.Then,the finite model is established and its' rationality is verified by experimental data.The stress nephogram is analyzed and the structural stressing state mode is constructed based on simulated data.Finally,the parameter analysis is carried out and the formulas are formed to predict the failure bending moment and ultimate bending moment. |
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