Experimental Study On Lateral Performance Of Steel Recycled Concrete Frame With Recycled Aggregate Block Infilled Wall

Recycled concrete is made from recycled aggregate of building waste, this is one important way of resource utilization of building waste. With the rapid development of cities, the building waste becomes more and more, as a result, this will cause a series of problems about natural resources, environmental protection and sustainable development. In order to relive the pressure of building materials and solve the environment problems of building waste, using building waste as an ecological resource is an effective method to response nation call of energy conservation and environmental protection.There is great difference on the physical and mechanical properties between concrete made by recycled aggregate and ordinary concrete. The research results show that the mechanical property and deformation index of recycled concrete is inferior to the ordinary concrete. The strength and stiffness degradation of recycled concrete frame is a bit fast than ordinary concrete frame under low-cyclic reversed loading. In order to make up the deficiency of the recycled concrete materials, profile steel was added to recycled concrete structures which called steel recycled concrete structure(SRRC). It has the advantages of steel structure and concrete structure, and has a broad prospect of development and application. Concrete hollow block or coal ash light weight block was usually used in infilled wall structures, and the infilled wall was connected with frame by flexible connection. Generally, infilled wall is regarded as non-structural component in frame structures, and is not involved the calculation of structural bearing capacity. So, we just discount the period of the structures. While, large quantities of research showed that infilled wall not only enclosure and divide the construction, but also make great contribution to stiffness of the structures, and bear part of horizontal force. Therefore, infilled wall can improve the bearing capacity and enhance deformation capacity by properly design and reliable structural measures. So, infilled wall should be considered to involve in bearing horizontal load. Therefore, this paper presents a new structure called steel recycled concrete frame with infilled recycled concrete hollow block wall structure, and study its lateral performance.According to the above mentioned analysis, this paper adopts the method of experimental study and finite element analysis, mainly including that:1. There were seven1/2.5-scale model specimens of single-span one-story rigid steel recycled concrete frame designed and made in this experiment, and factors of width height ratio, axial compression ratio, structural measures, different infilled materials, degree of filling had been considered.2. Under low-cyclic reserved loading, stress and strain distribution and the relationship between top displacement and bearing capacity had been tested. By contrast analysis of lateral performance on three different degree of infilling frame, the failure mode and deformation features of steel recycled concrete frame with infilled wall was obtained. Research on structural lateral performance of different axial compression ratio and width height ratio, the results showed that axial compression ratio and width height ratio had a great influence on lateral performance. Finally, the mainly influence factors were summarized, and the change trend of bearing capacity and stiffness was obtained.3. Based on ABAQUS finite element analysis software platform, the refinement model of steel recycled concrete frame with infilled recycled concrete hollow block wall was built by contact relationship. From the results of nonlinear finite element analysis value compared to test value, the correctness of model was verified. On the basis of the finite element model, there are much more different factors with different levels researched. Finite element analysis results showed that the model was reliable and the changing trend of lateral stiffness and horizontal bearing capacity can be obtained, and it can be as a reference of structure assessment and theoretical analysis.