Research on impact performance of prestressed steel strand

As a common prestressed member, the steel strand has a wide range of applications. Its bearing capacity affects the safety of the whole structure. Once it is damaged, the whole structure will be damaged or even collapsed. As a single tension bearing member, the transverse behavior of steel strand is often ignored. However, in recent years, the impact fracture accidents of steel strand occur frequently, and the research on transverse impact resistance of steel strand is very important. At present, there is no reliable evaluation standard for the mechanical properties of steel strand subjected to impact. The strand is made of several independent wires. Under the action of external load, the stress of each strand is different, and the stress distribution inside the strand is more complex. Under the action of transverse impact, the fracture position and quantity of strands are different, and the failure modes caused by different impact conditions are also different. In order to understand the mechanical performance of steel strand under transverse impact and provide evaluation basis to improve the structural safety, this paper carried out relevant research through test and finite element simulation method.