Since 2000 when the My Thuan Bridge, the first cable-stayed bridge in Vietnam, was put into operation, and now Vietnam has more than 20 types of cable-stayed bridges constructed throughout the country in the last two decades, which is a significant accomplishment for a developing country like Vietnam. Therefore, the SHM system is gradually being designed and installed for cable stayed bridges to ensure economic exploitation and safety. Due to the limited of financing sources, these systems are very limited, and their quality have a lot to be desired. Also, due to the lack of appropriate classification personnel with experience in the SHM system, these systems encountered a lot of problems. In this article author will deeply analyze the mistakes and problems of these SHM systems, which already exist in Vietnam, to find solutions for the future. Therefore, this will open up new prospects, new challenges and possibilities for the development of these systems in Vietnam in the near future.
Abstract. Dragon Bridge -The world's largest dragon-shaped steel bridge, with an installation cost of $85 million USD, features 6 lanes for two separate directions, 666 meters of undulating steel in the shape of a dragon in the Ly Dynasty, the symbol of prosperity in Vietnamese culture. This unique and beautifully lit bridge, which also breathes fire and sprays water. It's the purposeful integration of the lighting hardware articulates the dragon's form, and the fire-breathing dragon head. This project transcends the notion of monumental bridge with dynamic colour-changing lighting, creating an iconic sculpture in the skyline that is both reverent and whimsical. The signature feature of the bridge was the massive undulating support structure resembling a dragon flying over the river. The dragon is prominent in Vietnamese culture as a symbol of power and nobility. Dragon Bridge stands out as a model of innovation. It has received worldwide attention in the design community and from the global media for its unique arch support system. Dragon Bridge serves as an example of how aesthetic quality of a design can serve cultural, economic and functional purposes. The article presents design solutions of the object and the evaluation of the technical condition before putting the facility into service.
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.
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