The project falls within the field of civil engineering technology. The emissions of construction solid waste (also known as 'construction garbage') in Shanghai have been increasing year by year, exceeding 70 million tons in 2018 (since 2016, transportation outside the city has been strictly prohibited). Traditional disposal methods not only waste land resources but also easily lead to ecological problems and even safety accidents. To innovate the resource utilization of construction solid waste and break through the bottleneck in the sustainable development of the Shanghai construction industry, it has become inevitable to develop structural engineering recycled aggregate concrete (referred to as 'structural recycled aggregate concrete') technology. This is not only the core of building a resource utilization industrial system for construction solid waste in Shanghai but also a necessary link to assist in the process of building an ecological civilization with 'green waters and mountains.' The project aims to achieve the safe application of recycled aggregate concrete in structures, and strives to solve the following key problems: (1) Recycled aggregate concrete prepared using traditional processes fails to meet structural performance requirements; (2) Adopting conventional concrete structure design methods is difficult to ensure seismic safety; (3) Using conventional concrete structure acceptance methods is difficult to quantitatively determine the service safety of structures. After more than ten years of joint research and development by industry, academia, and users, the following technological innovations have been achieved: 1. Developed the preparation technology and equipment for structural recycled aggregate concrete. Revealed the performance degradation mechanism of recycled aggregate concrete, proposed a series of performance control technologies, invented crushing processing equipment, and realized the preparation of recycled aggregate according to quality requirements, controlling the fluctuation of recycled aggregate concrete quality. A complete set of technologies for the preparation of structural recycled aggregate concrete has been formed, meeting the performance requirements of structural recycled aggregate concrete. 2. A theoretical and methodological framework for the design of recycled aggregate concrete structures has been established. A stress-strain stochastic constitutive model for recycled aggregate concrete has been created, revealing the mechanism of increased damping, and a design method for components of recycled aggregate concrete based on time-varying reliability has been proposed, breaking through the technical bottleneck that existing structural analysis software cannot carry out seismic design of recycled aggregate concrete structures. 3. Construction technology and safety acceptance monitoring system for recycled aggregate concrete structures have been created. Key technologies for the construction of recycled aggregate concrete structures have been developed, and a health monitoring platform for recycled aggregate concrete structures based on big data technology has been established, achieving full process monitoring from construction to service, and providing a scientific basis for the first time in service safety evaluation of structures. The project has been authorized with 36 national invention patents. Software copyright 4 items, utility model patents 28 items, chief editor of national and industry standards each 1 part, main/co-editor of local standards 8 parts, published academic monographs 1 book, published papers 364 articles, strict citations 6630 times, including SCI papers 127 articles, WOS strict citations 1380 times, EI papers 135 articles, CCD strict citations 3208 times; trained over 50 doctoral and master's students; the first author has been selected as an Elsevier Highly Cited Chinese Scholar for five consecutive years (2014-2018). The technology of this project has been implemented in Shanghai and radiated to Fujian, Shaanxi, Xinjiang, Shanxi, and other places, forming a complete technical system from the preparation of structural recycled aggregate concrete, structural design to construction acceptance; designed and built the first high-rise building with a recycled aggregate concrete structure in China, and its technical achievements have been included in the industry standard "Recycled Concrete Structural Design Standard." The adoption has promoted the introduction of mandatory policies for the application of recycled aggregate in Shanghai. In the past three years, related units have increased sales by 1.916 billion yuan using this technology, with significant economic, social, and ecological benefits. The project's achievements have established a key technical system for recycled aggregate concrete structures, providing scientific and technological support for the sustainable development of the construction industry in the country and Shanghai, which is of great significance and has broad market prospects. The committee chaired by Academician Jiang Huancheng assessed that "the comprehensive technology of the project has reached an international advanced level, among which the time-varying reliability analysis of recycled aggregate concrete structures, seismic performance design, and health monitoring are at the international leading level."