Achievements of Li Hui's Works

He has presided over the research or completed the National Science Fund for Distinguished Young Scholars 1, the key projects of the National Natural Science Fund (sub-projects) 1, 2 general projects, 2 exploration projects of the National 863 Program, the Cross-century Talents Program of the Ministry of Education 1, the Provincial Science Fund for Distinguished Young Scholars 1, and the Western Construction Science and Technology Plan of the Ministry of Communications 1. Won the first prize 1 item of provincial and ministerial level scientific and technological progress, 2 second prizes (ranking 1 and 2), 2 third prizes and 7 national patents; Published 2 monographs and 50 papers/kloc-0 in domestic and foreign journals, including SCI 10, EI 30, ISTP 25 and international conference reports 3; Invited to give lectures at internationally renowned universities such as California Institute of Technology, University of Southern California, Irvine, University of Houston; Hold important positions in many international conferences.

In the field of structural vibration control, the active and semi-active control systems, experiments, algorithms, design methods and engineering applications of structures are systematically studied. 1997 took the lead in applying passive energy dissipation technology to seismic strengthening of building structures; Since 2000, shape memory alloy intelligent civil engineering structures with earthquake damage self-monitoring and self-control have been systematically developed. In 2003, the unified design method of structural vibration control system was established for the first time at home and abroad in cooperation with Academician Ou. In 2004, he led and cooperated to complete the engineering application of the second set of MR fluid intelligent damping and vibration reduction system in the world, and was one of the three people who discovered and revealed the phenomenon of negative stiffness control in the international civil engineering field.

In the field of structural health monitoring, two kinds of intelligent civil engineering structures based on shape memory alloy and carbon fiber have been developed: damage self-sensing and self-repairing. The design method and implementation technology of bridge structure health monitoring system are studied. Led and cooperated to complete the design and implementation of the world's first long-span bridge structure health monitoring system, using a large number of optical fiber sensors; The first and second generation reference models of health monitoring system for long-span cable-stayed bridges are established. The related achievements of this project have been applied to the National Swimming Center (2008 Olympic Games), Shandong Binzhou Yellow River Highway Bridge, Shandong Dongying Yellow River Highway Bridge, Harbin Songhua River Cable-stayed Bridge and other large structures.

In the direction of intelligent high-performance concrete and structure, nano-smart concrete and its multifunctional characteristics (pressure-sensitive characteristics and its mechanism, mechanical properties and its mechanism, durability and its mechanism) were put forward for the first time at home and abroad and systematically studied. Intelligent concrete sensors are developed and applied to health monitoring of large bridge structures. The unified constitutive relation of confined high strength concrete is established. A new type of high-strength concrete composite structure with concrete-filled steel tubular composite columns as the core is proposed. The seismic performance of this new composite structure is systematically studied, and the corresponding seismic design method is established. The above achievements have been applied to more than 20 high-rise buildings, and the Code for Design of High-strength Concrete Composite Columns has been compiled and the High-strength Concrete and Its Composite Structure has been published.