CFRP Carbon Fiber Cable Was Successfully Applied for the First Time in Space Structure

On August 18th, Yue Qingrui, Chairman of the China Metallurgical Construction Research Institute and academician of the Chinese Academy of Engineering, visited the Sanya Stadium project to observe and discuss the application effect of the wave anchor CFRP parallel cable developed by the China Metallurgical Construction Research Institute in the cable structure of the Sanya Stadium. . This project is the first large-scale application of CFRP board cables in the actual project of a large-span stadium. It is an international initiative and has an important leading role and milestone significance for the promotion and application of CFRP materials in large-span space structure and even new structures.

The total construction area of Sanya Stadium is more than 88,000 square meters. The roof of the stadium is a spoke-type cable truss structure. The short axis of the plane projection is 224 meters, the long axis is 261.8 meters, the central opening is 134 meters short and the long axis is 171.8 meters. In order to improve the wind resistance of the structure, the roof structure is equipped with inner ring cross cables; in order to reduce the imbalance force caused by the inner ring cross cables to the lock clamp, the project innovatively applies CFRP parallel plate cables with a stronger modulus ratio much higher than ordinary steel cables. , The structural problem is perfectly solved with new materials and new components.

During the inspection and exchanges, Yue Qingrui and his entourage visited the construction progress of the roof cable structure of Sanya Stadium and the application of CFRP parallel slat cables for the wave anchors, and exchanged on-site CFRP cables. At the meeting, Jin Ping, the project manager of Sanya Stadium of MCC South China Company, firstly reported on the construction of the cable structure; Dr. Liu Xiaogang, vice president of the Institute of Science and Technology of China Metallurgical Construction Research Institute, commented on the wave anchor CFRP parallel cable in the Sanya Stadium Technical background and related technologies such as R&D, design and manufacturing applied in the loop cross cable were reported; Zhu Zhongyi, deputy chief engineer of the Beijing Institute of Architectural Design and Research of the design unit, Liu Yue, associate professor of Beijing University of Technology, a member of the R&D team, and Chongqing manufacturing unit Zhuo Jing, general manager of Dali Cable Co., Ltd., Luo Bin, general manager of Dongda Prestress Co., Ltd., the construction unit of cable structure tensioning and lifting, and You Zhiwen, general manager of China Metallurgical Steel Structure, the general contractor of steel structure engineering, had exchanges and speeches.

Yue Qingrui expressed his gratitude to all parties who have contributed to the successful implementation of the project. He said that the successful application of the wave anchor CFRP parallel plate cable in the Sanya Stadium project is the world's first case and a breakthrough in the application of CFRP cable structure in large-span structures. , Has an important milestone, it is accidental and inevitable. It will play an important leading role in the application of CFRP structure in new projects in the future. The national "14th Five-Year Plan" also mentions the need to promote the application of CFRP and its new structure. , I believe that through the demonstration and leadership of the Sanya Stadium project, the application of CFRP in new projects will usher in new vigorous development. Zhang Jinxun, deputy general manager and chief engineer of Beijing Urban Construction Group, said that Sanya Stadium’s first international application of CFRP cable is exciting. The project team has worked meticulously in every link from R&D to manufacturing and installation, and the structural safety is fully guaranteed; the inner ring cross cable uses CFRP cable. Instead of traditional steel cables, it is the rational use of materials and component innovation to optimize the structural performance, and thanks to the team of Academician Yue Qingrui for improving the structural performance of Sanya Stadium through independent innovation.

In 1996, China Metallurgical Construction and Research Institute took the lead in the domestic research on the application of carbon fiber reinforced composite materials in structural reinforcement projects, and took the lead in establishing the first domestic academic exchange platform in this field "China Civil Engineering Society Concrete and Prestressed Concrete Branch Fiber Reinforced Composite Materials (FRP) and Engineering Application Professional Committee" and the first technological innovation alliance "Carbon Fiber and Composite Material Industry Technology Innovation Strategic Alliance"; took the lead in designing and building a carbon fiber reinforced concrete structure lighthouse in the South Island reef, driving The application of CFRP-concrete structure in ocean engineering. The application of CFRP cable structure in Sanya Stadium is also an international initiative, which will play an important leading and leading role in the application of CFRP cable structure in new structures.

At the construction site, a group of people checked the construction of the cable structure, focusing on the installation of carbon fiber cables (CFRP cables), the cross cables between the upper and lower loop cables. Yue Qingrui said that although carbon fiber cables are used for the first time, from the amount of materials to the selection of processing technology, they are sufficient and conservative, and there are many safety reserves, but the lightness of carbon fiber cables is different from steel cables. The effect is very good. Zhang Jinxun said that the selection of cable structure materials is appropriate. The combination of domestically-made high-vanadium closed cables and carbon fiber cables currently used can give full play to their respective characteristics and functions and jointly serve the entire cable structure.

Samples of the materials used in the cable structure were placed on the construction site for those who participated in the survey to understand in detail. These samples are domestic high vanadium closed cables, cast steel welded test pieces, cable clamps, and carbon fiber cable samples. According to research experts, carbon fiber cables are the first to be used in large-span spatial structures in the world. The maximum diameter of high vanadium enclosed cables used in the Sanya Stadium Project has reached 120mm, which is the largest diameter used in the construction of a comprehensive stadium in China. G10MnMoV6-3+ QT2 cast steel cable clamp is also the first time that it has been used in construction in China.

Zhang Wei, General Manager of Sanya Guo'ao Sports Industry Investment Co., Ltd., Han Jiancheng and Li Yunbo, Vice Presidents of Beijing Urban Construction Six Construction Group Co., Ltd., Gao Wenguang, Chief Engineer, Su Honghua, Executive Deputy General Manager of China Metallurgical Steel Structure Co., Ltd., Liu Minglu, Deputy Chief Engineer, Design Institute Dean Luo Xinglong; Assistant General Manager Chang Zhengfei and Technical Director Li Rong of China Metallurgical Construction Research Institute attended the inspection and exchanges.

Source of this article: China Metallurgical Construction Research Institute, Beijing Urban Construction Sixth Construction Group