再生混凝土作为一种绿色环保材料，符合可持续发展的重要理念。其在工程的应用将对灾后重建，以及资源循环利用做出巨大贡献。国内外虽已对再生混凝土材料及其构件的力学特性进行了研究，但为了工程应用还有很多方面需要进一步深入研究。本项目拟提出一种新型钢管约束再生混凝土框架-混凝土核心筒混合结构体系，以改善工程应用中再生混凝土材料及其构件的力学性能。主要研究内容包括：钢管约束再生混凝土复合材料损伤本构模型研究；新型混合结构体系中两类关键节点的损伤破坏机理、动力性能和滞回智能分析模型研究；新型钢管约束再生混凝土框架-混凝土核心筒混合结构在强震作用下的破坏机理和抗震性能研究。通过本项目的研究，提出一套系统的这种新型混合结构体系在强震作用下的分析计算理论、设计原则和设计方法，项目的研究成果不仅在理论上填补一些空缺，而且为钢管再生混凝土混合结构工程应用打下基础。因此本项目的研究具有重要的理论意义和工程应用价值。

As an environmental material, recycled concrete accords with the concept of sustainable development, it will make a great contribution to the disaster reconstruction and the recycling of resources. Although some research on the mechanical properties of for materials and members were conducted in domestic and foreign, many aspects on the theory analysis and engineering applications for recycled concrete should be further studied in order to improve the mechanical property of material and member of recycled concrete. The main contents including：Research on dynamic damage constitutive model of the steel reinforced recycled concrete-filled steel tube compound material; The damage mechanism,dynamic performance and hysteresis intelligent model of two types key joints in hybrid structures structure of steel reinforced recycled concrete-filled steel tube-concrete core walls; The damage mechanism and seismic performances of mixed structure of steel reinforced recycled concrete-filled steel tube-concrete core walls under severe earthquake. A new analysis theory,design principle and method of recycled concrete filled steel tube-concrete core walls under severe earthquake will be proposed through the project research. The research results of program will not only fill some vacancy in theory to the field of present mix structural of recycled concrete filled steel tube engineering,but also lay a foundation to the application of hybrid structures of recycled concrete-filled steel tube.Therefore,this research program has a crucial significance in theory and a great value on engineering applications.