Study On Seismic Behavior Of Modified Recycled Aggregate Concrete Frame Corner Beam-column Joints

With the sharp deterioration in the energy crisis intensifies and the ecological environment,sustainable development of innovative research materials is one of the issues to be explored inbuilding industry. After the waste concrete crushing, grading, cleaning process to produce acertain level of Grading and strength is called recycled concrete. In some extent, recycledconcrete reduce the amount of construction waste emissions and protect the environment;However, the durability of recycled concrete can’t be guaranteed compared with ordinaryconcrete, recycled concrete by adding modifiers to improve its durability has become a reality;Tests show fly ash can improve recycled concrete frost resistance, impermeability, corrosionresistance, resistance to chloride ions, etc. On this basis, this paper discusses the impact ofseismic performance after adding fly ash in recycled concrete.The experiment what two specimens of recycled concrete frame of corner nodes are loadedin low cyclic loading, study their similarities and differences in terms of seismic performance,and through the processing of the experimental data obtained: hysteresis curves, skeletoncurves, stiffness degradation curve, load characteristics and energy capacity, which handsseismic performance curves. Combined with changes in the process of testing the experimentalphenomena and found the seismic performance of modified regeneration concrete increasedslightly. In the same time, modified the effect can be verified and proved that modification ofrecycled concrete can be to replace the ordinary concrete applied to the actual load-bearingstructure.By the experimental results to calculate bearing crack capacity and compare with ordinaryconcrete. The results showed that the bearing crack capacity of modification of recycledconcrete increased slightly; addition, on the basis of ordinary concrete shear capacity formulato infer shear capacity formula of recycled concrete, comparing the calculated andexperimental values found that there are better fit.In conclusion, the article ABAQUS finite element software on two specimens of recycledconcrete frame joints quasi-static tests were carried out simulation and experimental resultswere compared and analyzed, ABAQUS simulation results show that the results can be betteras a practical reference; Since this experiment is to explore the trials, so this proposal to studyfurther in terms of the type modifier content, recycled aggregate substitution rate.