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Prestressed stayed steel columns (PSSCs) are structural components notable for their exceptional stability and load capacity. However, their behavior under eccentric compression remains poorly understood compared to their performance under axial compression. This study conducted tests and finite element analysis (FEA) to investigate the stability of PSSCs under eccentric compression loading. The study focused on examining the overall stability, buckling modes, and ultimate load capacity of PSSCs under various scenarios. The findings revealed that PSSCs exhibit significantly higher stability and load capacity than conventional columns. However, when subjected to eccentric compression, they experience a substantial decrease in stability. The results of the linear and nonlinear buckling analyses suggest that interactive buckling may occur under certain conditions, thereby influencing the buckling load. These findings clarify the correlation between stability and eccentric compression, offering valuable insights for future research and practical engineering applications.

FASTMast (Folding Articulated Square Truss Mast) deployable structure is the main bracing structure for the flexible solar array of the international space stations. This study investigates the buckling of FASTMast deployable structures. To this end, the buckling modes and the stiffness characteristics of this structure using the flex batten as an elastic bearing member were theoretically analyzed. The analytical results show that (1) the buckling mode of a FASTMast deployable structure is similar to the elbow joint movement failure when the stiffness of the flex batten is below a critical stiffness value. Once this critical stiffness is reached, the buckling mode takes on the form of Euler buckling. (2) The stiffness of the flex batten is proportional to its cross-sectional second moment of area. Furthermore, an experimental study was carried out to validate the accuracy of the theoretical analysis. The results from experimental work agree fairly well with those from theoretical analysis. The research findings herein are expected to be useful for future studies on similar structures.

To provide practical calculation method for analyzing the out-of-plane stability of single tube CFST arch bridge and the out-of-plane elastic stability of typical single tube CFST arch bridge was analyzed by finite element method. Firstly, the basic structural data and statistic parameters of 25 single tube CFST arch bridges were collected and analyzed using statistical approaches. Secondly, on the basis of the existing data, the finite element models of three types of typical single tube CFST arch bridges with span lengths of 50∼59 m, 60∼69 m and 70∼79 m were established and their safety performance were examined. The basic assumption of using elastic stability coefficient to analyze the outof- plane elastic stability of typical arch bridge and the calculation methods for vertical and transverse loads were provided. Different finite element methods were adopted to analyze the out-of-plane stability of typical arch bridges and the finite element calculation methods for out-of-plane stability of typical arch bridges were determined. The results indicate that the finite element model of the typical single tube CFST arch bridge established based on the statistic data is able to reflect the actual condition of the structure, and it is proper to use stability coefficients of dead and live loads to calculate the out-of-plane load bearing capacity and the ultimate load bearing capacity of typical arch bridges.