Ma Niujing

Engaged in long-term research on bridge structure theory and engineering applications, presiding over and participating in multiple longitudinal and transverse projects. In recent years, we have mainly devoted ourselves to theoretical research on steel bridge calculation theory, bridge structural vibration, bridge construction control, force transmission mechanism of bridge structural systems, and maintenance technology for large-span and complex bridges. In the field of engineering practice, presiding over and participating in the construction control and key technical research of several super large bridges, including the Hongqili Highway Railway Bridge of the Shenzhen Yangtze River Railway, the main passage of Ningbo Zhoushan Port, the Hong Kong Zhuhai Macao Bridge, the Shenzhen Zhongshan Passage, the Xiangshan Bridge, and the Humen Bridge maintenance project. Publishing over 30 academic papers as the first/corresponding author in well-known domestic and international journals such as Nonlinear Dynamics, Science China Physics Mechanics&Astronomy, Chinese Journal of Mechanics, Chinese Journal of Vibration Engineering, and Chinese Journal of Highways. As the first inventor, obtaining nearly 20 authorized invention patents both domestically and internationally.

The representative achievements obtained mainly include: (1) In the research of orthotropic steel bridge decks, a detailed analysis of the welding process of orthotropic plates was conducted, and an empirical formula for residual stress distribution in U-rib orthotropic plate welding was fitted using segmented polynomials; A combined plate beam element mechanics calculation model is proposed for commonly used U-ribbed orthotropic plates in engineering, which can significantly improve the efficiency of structural analysis; Derive the nonlinear dynamic equation of orthotropic steel bridge deck considering residual stress effects, and propose the internal resonance phenomenon that exists during the large amplitude vibration process of orthotropic steel bridge deck. The doctoral thesis Research on the Dynamic Behavior of Steel Box girder Stiffening Plates for Large Span Bridges was awarded as an excellent doctoral thesis by South China University of Technology. The research team led the completion of the analysis and engineering application of orthotropic steel bridge deck structures, which won the first prize of Science and Technology from China Transportation Association and China Steel Structure Association, respectively. (2) In terms of identifying the internal forces of cable rods, an incremental cable adjustment method for concrete cable-stayed bridges considering the temperature difference effect between cables and beams is proposed, which can achieve high-precision cable adjustment work under any environmental temperature conditions. The related technical achievements have been authorized for invention patents and have achieved good economic benefits in actual bridge applications, receiving high praise from owners and other participating units. (3) During the construction monitoring process of the Hong Kong Zhuhai Macao Bridge, multiple domestically pioneering technical challenges were overcome, including multi tower mixed multi construction methods, asymmetric loads and structures, temporary anchoring and release of tens of thousands of tons · meters of steel box girder web plates, and construction of super large tonnage offshore aerial swivel hoisting. Significant social and economic benefits were achieved, and the project was highly praised by the owner.