ABSTRACT
The development and application of structures made of high-performance materials is the necessary to the breakthrough of spans, the extension of service life, and the upgrading of structural systems in bridge engineering. Accurate assessment of the ultimate capacity of structures made of high-performance material is fundamental to its engineering application. Mechanical properties of high-performance materials differ greatly from those of traditional materials in bridge engineering, such as fiber-reinforced polymer (FRP) are orthogonally anisotropic, high strength steel (HSS) has low ductility and its fracture surface varies considerably with steel type, and the performance of 3D printed steel is related to the printing process. Traditional physical experiments’ method of exploring the evolution law of its performance is usually time-consuming and labor-intensive. It is also difficult to reveal the internal evolution mechanism of materials by the single-scale analysis method. Hence, the authors used the multi-scale assisted method to explore the bearing capacity of FRP, high-strength steel, high-strength bolts, and 3D printed steel.
