Design and application of ultra-high performance concrete —— Case review of Changjiang Jiayu Bridge

Ultra-high performance concrete (UHPC), as a new type of cement-based material with ultra-high strength, excellent durability, and good workability, has shown significant application value in bridge engineering in recent years. This paper takes the Jia Yu Bridge on the Yangtze River as an example to explore the design and application of ultra-high performance concrete. The Jia Yu Yangtze River Bridge, a key project of the Wuhan Urban Circle Ring Expressway, adopts a cable-stayed bridge structure. By introducing ultra-high performance concrete, it addresses multiple technical challenges in large-span bridge design. The high strength and durability of ultra-high performance concrete effectively enhance the scour resistance of the bridge foundation, improve seismic performance, and significantly reduce main beam deformation. Additionally, the application of ultra-high performance concrete optimizes construction techniques and reduces maintenance costs throughout its lifecycle. Studies show that ultra-high performance concrete not only meets engineering requirements under complex hydrogeological conditions but also achieves structural lightweighting and aesthetics, providing crucial technical support for modern bridge engineering. The successful practice of the Jia Yu Bridge on the Yangtze River validates the technical advantages and application potential of ultra-high performance concrete in large-scale bridge projects, offering valuable experience and reference for future bridge construction in China.