Seismic Performance Analysis Of Eccentric Compression Laminated Slab Shear Wall

This paper combines two methods of experiment and simulation to carry out seismic analysis of laminated slab shear wall,proposes the parameter setting and operation steps of software simulation,discusses the mechanical characteristics of laminated slab shear wall under eccentric force,and compiles the laminated slab shear wall for subsequent engineers.The relevant seismic codes and provisions of the composite shear wall put forward theoretical support,and the main conclusions are as follows:(1)Taking the experiment of laminated slab shear wall conducted in the laboratory of Hefei University of Technology as the research background,and using ABAQUS finite element software to simulate the experiment,the results show that the nonlinear parameters and material constitutives selected in this paper are accurate,The modeling method and operation steps adopted are feasible,and provide ideas and help for the subsequent engineers to use ABAQUS software to simulate the laminated slab shear wall.(2)Through software simulation of eccentric laminated slab shear wall,it can be found that the laminated slab shear wall under eccentric compression mainly suffers from two types of damage: large eccentric compression damage and small eccentric compression damage.Among them,there are obvious signs of damage to the laminated slab shear wall under large eccentric compression.After the tensile side steel bar yields,the compression side concrete is crushed,and the whole is ductile failure.The failure mode is mainly bending failure;small eccentricity There is no obvious sign for the failure of the laminated slab shear wall under compression.Before the compression side concrete is crushed,the tension side steel bars still have not yielded,and the whole is brittle failure.The failure mode is mainly compression failure.The bearing capacity of the wall under large eccentric compression is lower than that under small eccentric compression,and the bearing capacity is reduced by up to 36.5%,but the ductility,stiffness degradation and energy dissipation capacity of the wall are significantly better than small eccentric compression,and the ductility increases by 6.4%.The stiffness degradation increased by 25.2%,and the energy consumption coefficient increased by 10.1%.In the future seismic design,small eccentric compression damage should be avoided for laminated slab shear walls,and large eccentric compression damage should be selected as far as possible on the premise that the bearing capacity of the wall panels meets the specifications.(3)The axial compression ratio will affect the seismic performance of the laminated slab shear wall under large eccentric compression.It can be found through simulation that as the axial compression ratio increases,the bearing capacity of the laminated slab shear wall under large eccentric compression The capacity gradually increases,but its ductility gradually decreases;the strength of concrete has little effect on the seismic performance of laminated slab shear walls under large eccentric compression.For the laminated slab shear wall under large eccentric compression,the mechanical properties of the wall cannot be improved blindly by reducing the axial compression ratio of the wall or increasing the concrete strength of the wall.It is necessary to choose a reasonable axial compression based on the actual project.Ratio and concrete strength.Figure: [42];Table: [13];Reference: [60]...