Mechanical properties of CFST short columns with different void ratios
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CCCC Fourth Highway Engineering Co.Ltd, Beijing 100176, China
Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China
Submission date: 2022-12-16
Final revision date: 2023-05-08
Acceptance date: 2023-06-07
Publication date: 2023-09-18
Archives of Civil Engineering 2023;3(3)
In order to study the mechanical behavior of concrete-filled steel tube(CFST) short column with different void ratios under a certain eccentricity. A fiber model of concrete-filled steel tube section with different void heights was established. Compared with existing model test data, the axial force and flexural moment strength models of concrete-filled steel tube columns with different void ratios were established. The results show that, in the case of different void ratios, the cross-section strength envelope shows an overall contraction tendency with the increase of void ratio, and each line is basically parallel. A model for calculating the coefficient of axial load degradation was established. The Han’s flexural moment strength model of the flexural component was revised, and the strength model of concrete-filled steel tube column under eccentric compression considering void ratio was established, which provides a theoretical basis and method for the safety assessment during the operation of concrete-filled steel tube arch bridges.
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