Seismic Performance Of Coal Gangue Concrete Medium And High Shear Walls

Coal gangue is a kind of black-gray rock with complex chemical composition produced in the process of coal mining,which is regarded as industrial waste.With the increase of coal output,the output of coal gangue,which is associated with coal,also increases exponentially.However,coal gangue has adverse effects on the ecological environment and human health.It is used as concrete coarse aggregate to make building materials,which can improve the utilization efficiency of coal gangue and promote the development of coal gangue components.In this paper,the seismic performance of coal gangue concrete medium-high shear wall is studied by ABAQUS finite element simulation method.The main research work and results are as follows:1.A piece of coal gangue concrete shear wall and a piece of ordinary concrete shear wall with a shear-span ratio of 2.0 are subjected to horizontal low-cycle reciprocating load tests,and their seismic performances such as hysteresis curves,skeleton curves,ductility,and stiffness are compared and analyzed.The test shows that the seismic performance of the coal gangue concrete shear wall is good,and there is no obvious difference with the ordinary concrete shear wall.2.On the basis of the existing tests,the finite element software ABAQUS is used to carry out numerical simulation analysis of the test specimens.Based on the hysteresis curve and skeleton curve obtained from the test,the results are compared with the simulation results.The results show that the finite element model can correctly reflect the results.The failure mechanism of the specimen proves the rationality of the finite element model.3.Optimize the design of the shear wall model based on the test,establish the numerical model of the coal gangue concrete shear wall specimen with different shear-span ratios,analyze its hysteretic characteristics,and establish a The specimen model of coal gangue concrete medium-high shear wall influenced by the reinforcement ratio of reinforcement and the longitudinal reinforcement ratio of edge members is used to analyze the seismic performance of coal gangue concrete medium-high shear wall.The results show that:(1)The bearing capacity of coal gangue concrete medium-high shear wall specimens decreases with the increase of shearspan ratio,the envelope area of hysteresis loop also increases gradually,the energy dissipation capacity is better,and the limit displacement also increases with the shear-span ratio.The span ratio increases and increases,the deformation capacity and ductility performance are improved,and it has better seismic performance.(2)The increase of the axial compression ratio can increase the stiffness and peak load of the high shear wall in coal gangue concrete,while the peak displacement decreases.The area of the obtained hysteresis curve decreases continuously,and the energy dissipation capacity of the specimen decreases continuously.(3)The increase of the longitudinal reinforcement ratio of the web plate has an effect on the ductility performance of the high shear wall in the coal gangue concrete to a certain extent,and has an effect on the ductility of the shear wall with the shear span ratio of 2.0 and 2.5.It reduces the ductility of the shear wall with a shear-span ratio of 3.0.When the shear-span ratio is large,the flexural bearing capacity of the shear wall decreases,and the height of the intercepted compression zone increases when the shear-span ratio is large,resulting in a decrease in the ductility of the shear wall.When the shear-span ratio is 3.0,the influence of the change of the longitudinal reinforcement ratio of the web of the specimen on the energy dissipation coefficient after yielding is basically negligible.(4)The increase of longitudinal reinforcement ratio of edge members has little effect on the failure form of gangue concrete medium-high shear wall.The coal gangue concrete medium and high shear wall can meet the seismic capacity requirements of the current building seismic design code after reasonable design,and can be used in practical projects.