1March, 989, recommended by the college, directly transferred to Ph.D. The topic of this paper is "Study on Constitutive Relation and Failure Criterion of Concrete and Steel Fiber Reinforced Concrete". During my master's degree and doctor's degree, I independently completed the design and development of all test devices in the National Natural Science Foundation project "Study on the Working Principle of Steel Fiber Reinforced Concrete under Bidirectional Stress", and completed most of the test work. Based on the theory of internal variables and irreversible thermodynamics, the intrinsic time constitutive model of steel fiber reinforced concrete is proposed, and the biaxial failure criterion of steel fiber reinforced concrete considering the influence of intermediate principal stress is established based on the strength theory of double shear stress. From June 65438 to September 0992, he received a doctorate in engineering.
From June 65438 to September 0992, I went to the Department of Architectural Engineering of Qingdao Institute of Civil Engineering and Architecture to engage in teaching and scientific research, participated in the National Natural Science Foundation project "Nonlinear Analysis of Reinforced Concrete Composite Loaded Members" (59278343), designed and developed a test device to test the strength and deformation of concrete under shear-compression and shear-tension combined loading conditions, and completed all the tests under shear-compression conditions; 1993 was approved by the State Council Academic Degree Office as the master tutor of structural engineering in Qingdao Institute of Civil Engineering and Architecture.
10, 1993, 165438 was admitted as a postdoctoral fellow in engineering mechanics by China University of Mining and Technology. He studied under Professor Xie Heping, engaged in the study of concrete constitutive relation and failure theory, with his main interests in concrete damage mechanics and fractal mechanics, and participated in some projects of the National Science Fund for Distinguished Young Scholars and the special fund for cross-century talents of the State Education Commission. During this period, the monotonic loading, cyclic loading and corresponding acoustic emission characteristics tests of concrete under uniaxial compression were completed. Using acoustic emission damage energy, modulus attenuation, thermodynamics and plastic mechanics, the damage evolution law of concrete was studied in practice and theory, with emphasis on the influence of different strain rates (1/S) on concrete strength and deformation, and the influence of different confining pressures (s0=0~40MPa) on concrete strength. In addition, according to the fractal geometry theory, the internal damage of concrete, that is, the development of microcracks and the acoustic emission process, is quantitatively described by fractal.
In July, 1995 was admitted as a postdoctoral fellow by China University of Science and Technology, and studied under Professor Fan Weicheng. He is engaged in the research on the behavior of building structures under thermal-mechanical coupling. His main direction is the mechanical properties of concrete at high temperature and its influence on the bearing capacity of structures. Based on plastic hinge theory, various calculation methods of bearing capacity of concrete slab at high temperature are put forward.
1since July 1997, I have returned to Qingdao Institute of Civil Engineering and Architecture to engage in scientific research and teaching. /kloc-0 was approved by the former Ministry of Metallurgy in May 1998 as a doctoral supervisor of structural engineering, and served as deputy director, assistant dean and vice president of the Department of Civil Engineering.
From 20065438 to May 2006, he worked in the Construction Department of Shandong Province, and served as a member of the party group and deputy director of the Construction Department of Shandong Province.
In June 2006, he was transferred to the School of Civil Engineering of Harbin Institute of Technology, and successively presided over or participated in many projects such as the National Natural Science Foundation, the National Key Basic Development Planning Project (973 Project) and the major international cooperation projects of the National Natural Science Foundation. From June 5, 2007 to February 2007, he did short-term scientific research in National Institute of Standards and Technology (NIST).
In 2004, "Research on Fire Resistance of Concrete Floors" won the second prize of Shandong Science and Technology Progress Award; He has published 2 monographs and more than 60 papers, including Nonlinear Mechanics Foundation of Concrete and Fire Protection Design of Concrete Structure.
2065438+transferred to Huaqiao University in February 2002.