APPLICATION THE ACOUSTIC EMISSION TECHNOLOGY FOR SHM SYSTEM OF CONCRETE CABLE-STAYED BRIDGE IN VIETNAM
Keywords:SHM System, Damage, Cracks, Acoustic Emission
Since My Thuan Bridge, the first concrete cable-stayed bridge in Vietnam, had begun construction in 1997 and was put into operation in 2000. After that, another concrete cable-stayed bridge had been constructed like Kien Bridge (2003), Bai Chay Bridge (2006), Rach Mieu Bridge (2009), Phu My Bridge (2009), Can Tho Bridge (2010), and three new bridges will be put into use at the end of 2018 as Cao Lanh Bridge, Vam Cong Bridge, and Bach Dang Bridge. Therefore, the SHM system is gradually being designed and installed for cable-stayed bridges to ensure economic exploitation and safety. The management unit began to pay more attention to the new cable bridges, which have already included the early stages' monitoring system. The existing SHM system installed on the bridges has many mistakes and problems in the SHM systems, which already exist in Vietnam. This paper describes the application an acoustic emission technology for the SHM system of a concrete cable-stayed bridge. The new SHM system with acoustic emission (AE) technology allows monitoring and tracking the processes that occur over a structure's entire volume. The structure is independent of strain and stress and depends mainly on the integrity of the structure that is of utmost importance for the bridge's service life and safe operation.