Abstract
with the rapid development of high-rise building structure, composite structure given priority to concrete filled steel tube is widely used in high-rise structure construction, the mechanical characteristics of concrete filled steel tubular has made a lot of research at the moment, and in optimization of economic indicators still needs further in-depth. In this article, economic indicators mathematical model of rectangular concrete filled steel tubular axial compression member is built by the MATLAB language, in order to achieve the aim of economic indicators optimization and provide an important reference for the engineering design and theoretical basis, a reasonable set of cross section form with the highest ratio of axial compression components is found through the model analysis of engineering examples.
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