Tian tian, associate professor, has been engaged in research on the durability and reliability of reinforced concrete structures since 2002. In 2007, he went to the research group of professor li zongjin of Hong Kong university of science and technology for post-doctoral research. In 2009, he began to carry out research work in zhejiang university.As head project presided over the youth fund projects and projects of national natural science fund, the specialized research fund for the doctoral program of higher education project, the basic scientific research in colleges and universities were youth innovation special scientific research projects, the ministry of railways corpus technology research and development plan, the zhejiang province key scientific research, including the sub-project of the innovation team, at the same time as the subject backbone participated in the national high technology research and development program (863 program) corpus, the national key basic research development program (973 program) corpus, and other major international cooperation project of national natural science fund subject of research work.Rich research achievements have been made in polymer modified cement based materials, analysis of concrete multi-field coupling effect under complex environment, and research on rust cracking process of reinforced concrete under harsh environment.So far, more than 50 academic papers have been published in domestic professional academic journals and conferences, and over 20 SCI papers have been published. Among them, 13 SCI papers have been published as the first author or the corresponding author, and 19 papers included in EI have been published as the first author or the corresponding author.The research results were cited by scholars at home and abroad for 356 times, among which SCI cited for 144 times, and each SCI paper was cited for 26 times.It has obtained 3 national invention patents authorization and 1 Shanghai science and technology progress award.Relevant research results have been applied in highway tunnel engineering in zhejiang province.