The project Basic Theory on Steel-Concrete Composite Structures under Complex Stress and Key Technologies of High-performance Structure System led by Professor Fan Jiansheng from THU Department of Civil Engineering won the second prize of the 2020 National Science and Technology Progress Awards. The project studied the analytic methodology of the steel-concrete composite structures, concentrated on improving the component performance and system innovation. Applying a precise calculation model, the project members further revealed the stress mechanism considering the materials and interfaces’ multi-dimensional and strong nonlinear course. Multiple high-performance composite components are established for spatial complex stress conditions and sophisticated design methods. The project developed a new high-performance composite structure system for large-scale complex engineering. The design and construction methods have breakthroughs in basic theory, design methods, and construction technology at the levels of materials, interfaces, components, and systems.

Since the beginning of the 21st century, the scale and difficulty level of infrastructure construction in China have continued to increase, and the development needs for large-scale and complex engineering structures have become increasingly prominent, especially in the face of a series of new challenges such as more stringent performance index requirements, more comprehensive functional and quality requirements, and more diverse social environment requirements. In the past 30 years, the steel-concrete composite structure has developed rapidly due to its significant technical and economic advantages. Many results have been achieved in its scientific research and engineering applications. However, traditional composite structures and related analysis theories, design methods, and complete construction technologies still fall behind engineering development needs.

Targeting the key problems facing steel-concrete composite structures, project members revealed the stress mechanism considering the materials and interfaces’ multi-dimensional and strong nonlinear course. The key problems are the analysis and design methods, component performance improvement, and system innovation. The project has been directly applied to more than 30 large and complex buildings and bridge projects, such as Canton East Tower, Wuhan Center, Shenzhen KingKey 100 Tower, Beijing Olympic Tower, Bridge of the Yueyang Dongting Lake, and Chongqing Yongchuan Yangtze River Bridge. With its significant economic and social benefits and broad application prospects, the project has contributed to the industry’s progress.

Main Sci-tech Innovations of the Project

Project Team