This project belongs to the field of civil engineering technology. The emissions of construction solid waste (also known as ldquo; construction wasterdquo;) in Shanghai City have increased year by year, exceeding 70 million tons in 2018 (external transportation is strictly prohibited since 2016). Traditional consumption methods not only waste land resources, but also easily cause ecological problems and even safety accidents. In order to innovate the resource utilization methods of building solid waste and break through the bottleneck of sustainable development of Shanghai City's construction industry, it has become inevitable to develop recycled aggregate concrete for structural engineering (referred to as ldquo; Structural recycled aggregate concrete rdquo;) technology. This is not only the core of building a solid waste resource industrial system in Shanghai City, but also a necessary link to help the process of ecological civilization construction. The project aims to achieve the safe application of recycled aggregate concrete in structurerdquo; and strives to solve the following key problems: (1) recycled aggregate concrete prepared by traditional processes is difficult to meet structural performance requirements;(2) It is difficult to ensure seismic safety by using ordinary concrete structural design methods;(3) It is difficult to quantitatively determine structural service safety by borrowing ordinary concrete structural acceptance methods. After more than ten years of joint research by industry, academia and research, the following technological innovations have been achieved: 1. Developed preparation technology and equipment for structural recycled aggregate concrete. Revealing the mechanism of performance degradation of recycled aggregate concrete, proposing a series of performance control technologies, inventing crushing processing equipment, realizing the preparation of recycled aggregate according to quality requirements, controlling the quality fluctuations of recycled aggregate concrete, and forming a complete set of technologies for the preparation of structural recycled aggregate concrete. Meet the performance requirements of structural recycled aggregate concrete. 2. The structural design theory and method of recycled aggregate concrete are established. A stochastic stress-strain constitutive model of recycled aggregate concrete was created, its damping increasing mechanism was revealed, and a design method for recycled aggregate concrete components based on time-varying reliability was proposed, which broke through the technical bottleneck of the seismic design of recycled aggregate concrete structures that cannot be carried out by existing structural analysis software. 3. A monitoring system for construction technology and safety acceptance of recycled aggregate concrete structures has been created. Researched and developed key technologies for the construction of recycled aggregate concrete structures, established a recycled aggregate concrete structural health monitoring platform based on big data technology, realized the entire process of monitoring from construction to service, and took the lead in providing a scientific basis for structural service safety evaluation. The project has been authorized to have 36 national invention patents, 4 software copyrights, and 28 utility model patents. It has edited 1 national and industry standards, and 8 local standards. It has published 1 academic monograph and published 364 papers. Strictly cited 6630 times, including 127 SCI papers, 1380 WOS papers, 135 EI papers, and 3208 CCD papers; and trained more than 50 doctoral and master's degrees; The first finisher has been included in the Elsevier China List of Highly Cited Scholars for 5 consecutive years (2014-2018). The project technology has been implemented in Shanghai and radiated to Fujian, Shaanxi, Xinjiang and Shanxi, forming a complete technical system from structural recycled aggregate concrete preparation, structural design to construction acceptance; the first recycled aggregate concrete structure in Shanghai City has been designed and built. The technical achievements of concrete high-rise buildings have been adopted by the industry standard "Design Standards for recycled concrete structures", promoting the introduction of mandatory application policies for recycled aggregate in Shanghai. In the past three years, relevant units have applied this technology to add 1.916 billion yuan in new sales, with significant economic, social and ecological benefits. The key technical system of recycled aggregate concrete structures established by the results of this project provides scientific and technological support for the sustainable development of the country and Shanghai City's construction industry. It is of great significance and has broad market prospects. The committee chaired by Academician Jiang Huancheng identified it as ldquo; The comprehensive technology of the project has reached the international advanced level, among which it ranks internationally leading in time-varying reliability analysis, seismic performance design and health monitoring of recycled aggregate concrete structures rdquo;.