For many years, Prof. Jin has taught undergraduate courses and postgraduate courses, such as principle of reinforced concrete structure, design of reinforced concrete structure, high-rise building structure, etc.

   In her career life, Prof. Jin took charge some projects of NSFC, including one Key project, four general projects, two sub-projects of National Program on Key Basic Research Project (973 projects), one Project of International Cooperation and Exchanges and one project of Hong Kong government development fund. As the main participant, she participated in two projects of national high technology research and development programs (863 program), in the National Large-scale Crucial Projects of the 7th and 8th Five-year Periods respectively, in one ministry of construction project, in two ministry of nuclear industry projects, two international cooperation projects and two international cooperation projects. She has more than 200 research articles published in the international famous academic journals, such as ACI Materials journal, ASCE Journal of materials in civil engineering, Materials and Structure, Magazine of concrete research, Computer and concrete, and some journals in China, including Journal of civil engineering, Journal of silicate, Journal of engineering mechanics, Journal of zhejiang university, Journal of architectural structure, etc.

She took a systematic research on the time-varying properties and the cracking mechanism of concrete structures during construction. The formation and evolution process for the microstructure of concrete was revealed and rebuilt in a three dimensional numerical model for cement hydration during construction. A calculation method for elastic modulus of cement paste from nano-, micro- to macro-scales was deduced to provide a scientific evidence of the performance assessment of concrete. The damage and deterioration characteristics for concrete structure during construction period was summarized. And the influence of performance variation to the early-age cracking and mechanical properties was discussed in view of materials, members and structures. Furthermore, the performance characteristics and the key parameters of concrete structures at different construction stages were proposed. The influence temperature, humidity, Cl -, CO2 and stress on hydration process of concrete were demonstrated in the diffusion model, and the inter actions of these factors were also taken account to established a multi-field coupling model for the time-varying performance of concrete structures during construction. The model provided scientific basis for the construction quality control.

A simple and practical prediction method was proposed to accurately analyze the chloride ion diffusion coefficients in cement paste in which the water to cement ratio and hydration degree were taken into consideration quantitatively. The numerical solution of chloride ions diffusion coefficient was innovatively obtained from the interfacial water-to-cement ratio and the hydration gradient to objectively evaluate the influence of interfacial factors on chloride ions diffusion. This research provided a new direction for study on the hydration process of concrete in invasion medium under complicated construction environments. The influence of cracking on the service performance of concrete structure was introduced to establish a diffusion model of chloride ions within cracks under drying-wetting cyclic conditions. Thereafter, the performance degradation of concrete structure under chlorides invasion was clarified during the life-cycle from casting to construction and to service period. The cracked concrete was idealized as anisotropic materials in which the tortuosity, width of cracks, roughness and capillary pores were represented to establish a chloride ion transport model considering the fuzziness and randomness of ions diffusion. The assessment method and design frame were given to analyze the influence of early-age cracking on the durability of reinforced concrete structures.

Based on the mesoscopic mechanics modeling and experiment investigation on the effective performance of cement-based piezoelectric materials, the modified three-dimensional Eshelby tensor and the stress concentration tensor of were given to analyze the interfacial effect of piezoelectric composites. And a software was programmed to calculate the effective performance of piezoelectric composites based on this research. During the analytical analysis, four kinds of methods, including dilute, self-consistent, differential, Mori – Tanaka, could be selectively used according to the ratio of Inclusion components. This investigation improved the intelligent monitoring theory and technology research, enhance the recognition efficiency and sensitivity. It laid a solid foundation for further improvement of intelligent control.