Research On Hysteretic Behavior Of Assembled Recycled Concrete Shear Wall

The assembled recycled concrete shear wall structure has high value of popularization and application because it has good ecological and economic benefits and social benefits.Nowadays,the shortage of labor and the shortage of energy are becoming more serious in our country,the natural coarse aggregate is increasingly exhausted,and the demolition of buildings that have reached the service life has resulted in the increase of the waste concrete.Therefore,the development of the construction industry has met a great challenge.The application of recycled concrete to the assembly shear wall can not only accelerate the development of China's construction industrialization,but also make the limited resources of our country circulate and solve some environmental pollution problems.At present,the study of assembled regenerated concrete shear walls is relatively less in our country.In order to clarify the hysteretic behavior of the shear wall structure,this paper uses the ABAQUS finite element software to simulate and analyze the assembled regenerated concrete shear wall structure.The research contents of this paper include the following aspects:1.In order to verify the rationality of using ABAQUS finite element software to research on hysteretic behavior of the assembled regenerated concrete shear wall structure,the experimental shear wall in another literature is selected as the comparison and analysis object.The finite element model which is exactly the same as experimental shear wall is established by the ABAQUS finite element software.The results show that the error between finite element simulation and experiment is small,and the average error is less than 10%.Therefore,it is reasonable and feasible to use ABAQUS to study the hysteretic behavior of assembled concrete shear wall.2.The effect of different kinds of concrete on the hysteretic behavior of the assembled shear wall was analyzed.The quasi-static simulation experiments are carried out on the assembly shear walls using ordinary concrete and recycled concrete respectively.It is found that the failure modes of shear walls with different types of concrete are generally similar,and the bearing capacity,ductility and energy consumption of the assembled regenerated concrete shear walls are slightly worse than the assembly shear walls with ordinary concrete,but it does not affect the use of practical engineering.3.In order to optimize the parameters of assembled regenerated concrete shear wall,the effects of recycled concrete strength,reinforcing bar strength,axial compression ratio,and high thickness ratio on the mechanical behavior of assembled shear walls were analyzed.It is found that the higher the strength of recycled concrete,the bearing capacity of the shear wall will also increase,but the speed of the bearing capacity degradation is accelerated.The bearing capacity of the shear wall increases with the increase of the strength grade of the steel bar,but the strength of the material is not fully brought into play when the strength grade reaches HRB500,the material strength is wasted.With the increase of axial compression ratio,the bearing capacity of shear wall increases,but the ductility decreases and the energydissipation effect is worse.The smaller the thickness ratio,the better the bearing capacity of the shear wall,and little influence on the other properties.