| Great changes have taken place in civil engineering industry in recent years. The research and utilize in recycled aggregate concrete become more and more popular. More research of recycled aggregate concrete is built on statics, and the research about the dynamics are few.Damping as a major component of the physical parameters of dynamical systems, the researchs are also less. In the design of concrete structure, damping is usually select as 5% by the standard, but from domestic and abroad, a large number of experiments have showed that the building under the process of stress, the damping values are not reasonable., so it is important to research the damping values. In this paper, the recycled aggregate concrete has carried on the theoretical analysis and the research on the experiment. This paper intends to study different substitution rate of recycled aggregate concrete constitutive relationship curve, while the use of recycled aggregate concrete phase method different damping force state measure. Summarize damping values changes with strain trends. Then using free vibration attenuation hair trends get recycled aggregate concrete damage and damping Through the above research which aims to promote the recycled aggregate concrete used as a structural material.In this paper, the main research contents are as follows:(1) Described the composition of recycled aggregate concrete materials in detail Research the strength of recycled aggregate concrete under different substitution rate f and constitutive relationship.(2) Through the material dynamic test methods, use the phase method to measure the aggregate concrete specimens damping value in the large state of deformation, and get the trend and expressions.(3) Based on cantilever beam method, free vibration attenuation of recycled aggregate concrete member in the inelastic phase damping ratio measurement. Get the recycled aggregate concrete damage and the relationship between the damping... |
