Research On Seismic Behavior Of Recycled Concrete Shear Walls With Different Shear-to-Slit Ratios

With the acceleration of the modernization process,urbanization has risen rapidly,the construction industry is booming,the exploitation of natural resources is increasing,and natural minerals are continuously decreasing.In order to develop a green,ecological,energy-saving and sustainable development path,our government has implemented relevant The policy attaches great importance to the recycling of resources and actively promotes the recycling and recycling of construction waste.The recycled concrete is recycled and reused after being processed to restore some of the original nature of the material.It becomes a new building material,solves environmental problems,and fully meets the "green" definition proposed by the International Environmental Protection Organization.By consulting literature and books related to the basic materials,mechanics,and work performance of recycled concrete,the constant parameters and constitutive relations applicable to this material have been determined.The ABAQUS finite element analysis software was used to analyze the seismic performance of 3 kinds of shear-span recycled concrete shear walls subjected to low-cycle reciprocating load.The main contents are as follows:The comparison of the mechanical properties of the recycled concrete shear wall under the repeated tensile pressure was performed by the finite element software and the laboratory.The constitutive relationship of the recycled concrete was verified,indicating that the ABAQUS software can simulate the recycled concrete shear wall well.Anti-seismic performance.With the reduction of the shear-span ratio,the bearing capacity of the recycled concrete shear wall is gradually increased.The ultimate load of the recycled concrete shear wall with a shear-span ratio of ? =1.0 is higher than that of the recycled concrete shear wall with a shear-span ratio of ? =1.5.The regenerated concrete shear wall of ? =2.0 increased by 50.4%and 150%,respectiverly Kc?Ky?Ku both show an increasing trend.Recycled concrete shear walls with,a shear-to-span ratio of ?=1.0 are 4.01 times,2.94 times,and 8.29 times higher than those with shear ratio ?=2.0,respectively,and their stiffness reaches the limit in the wall.After the state is significantly reduced,the ductility is getting worse and worse,there is a clear brittle failure,in the field of construction engineering should avoid designing such a wall.Regenerated concrete shear wall with shear span ratio ?=2.0 is better than shear span ratio ?=1.5 for regenerative concrete shear wall,the ability to dissipate energy is stronger than the latter,damage tends to bending failure,and the shear-to-span ratio is equal to 1.0.The shear wall of concrete is the least ductile and its ability to dissipate energy is relatively weak.In summary,the shear wall of ?=2.0 absorbs energy and ductility are more excellent,and has higher application value in practical projects.The small shear span has a weaker ability to consume energy than the shear wall and is prone to brittle failure.The design of such walls should be avoided in the field of actual construction engineering.