On May 23, the Xi'an Fengyi Bridge was officially opened and integrated into the city's road network. As a key project under Xi'an's "Four High-Tech Zones" initiative, the bridge is located on Lingyun North Road in the Xi'an International Community. Designed as a three-tower cable-stayed structure, the bridge features a 95-meter main tower, spans 526 meters in length and 57 meters in width, and includes 108 spatially arranged fan-shaped cable stays. It accommodates 10 lanes (five in each direction) with a design speed of 60 km/h.
The main girder of the bridge is a fully welded steel box girder, designed as a fully floating system with elastic restraints. It is the first project in China to use bridge abutments and a combined bearing system as the seismic resistance mechanism, making it the country's widest multi-tower cable-stayed bridge with a fully floating system. The construction encompasses bridges, lighting, traffic systems, landscaping, and aesthetic engineering, balancing urban transportation needs with scenic functionality.
Carbon Fiber's Role in the Project
The Fengyi Bridge's successful completion was supported by carbon fiber technology from Zhongfu Carbon Core. Constructed by China Railway Third Bureau Group Co., Ltd., the bridge employs an innovative fully floating system with elastic restraints, ensuring structural stability and safety while enhancing the city's skyline. The bridge utilizes the world's largest carbon fiber cable stays (7-253), with an anchoring capacity of 2,000 tons. These cables were produced using carbon fiber reinforcement materials supplied by Zhongfu Carbon Core, with OVM Company handling cable fabrication and anchoring. This breakthrough not only highlights China's advanced bridge engineering capabilities but also sets a new global benchmark for cable-stayed bridge design.
The carbon fiber cables are made from Zhongfu Shenying's SYT49S-24K carbon fiber. Leveraging Zhongfu Carbon Core's expertise in pultrusion technology, the production process achieves high-performance conversion from raw carbon fiber to finished products, delivering a tensile strength exceeding 3,200 MPa. With its technical prowess, Zhongfu Carbon Core has demonstrated excellence in bridges, architecture, and wind energy. Its innovations are evident in projects such as the Danjiangkou Reservoir Bridge, Linquan River Bridge, Shanghai Petrochemical Logistics Corridor, and Tsinghua University's Old-New Civil Engineering Pavilion footbridge. Beyond infrastructure, the company's carbon fiber composite panels are widely used in wind turbine blades, enhancing strength, reducing weight, and boosting energy efficiency.
(Source: China Composites Industry Association)
