Study On Seismic Performance And Failure Mechanism Of T Shape Superimposed Wall Plane Structure Considering The Effects Eccentric

In recent years,the intensity,speed and scale of urban construction have been accelerated rapidly,and the development of residential construction has been unprecedented.As a new type of structural system,The structure of the composite concrete shear wall structure,with its own significant advantages,Such as low cost,faster construction speed,less environmental pollution,etc.,It is a play an important role for sustainable development of China and to solve the shortage of resources.At the same time,as a high-rise structural components,it is very important to study the seismic performance and failure mechanism of laminated concrete shear wall structures.In this paper,ABAQUS finite element software is used to simulate the seismic performance and failure mechanism of eccentric laminated plate T shear wall.The main contents are as follows:Nonlinear dynamic pushover theoretical analysis and using theoretical calculations.Based on the low-cycle reciprocating load test of T composite plate shear wall in the anhui jianzhu university laboratary,the finite element model was established by ABAQUS,and the crack process and the failure mode of the web of the T shear wall structure were analyzed,Skeleton curve,bearing capacity and so on,compared with the experimental data,the finite element simulation results are verified the effectiveness of the model.Which provides a guarantee for analyzing the seismic performance and failure mechanism of the shear wall under different conditions.According to the difference of eccentricity,which are divided into five different T shear wall models with different meanings and one kind of cast-in-place T shear wall model,the damage behavior,bearing capacity,ductility,hysteresis characteristics,stiffness degradation and energy dissipation of the laminated T shear wall structure are studied by using the ABAQUS finite element method under repeated loading.The results show that under the influence of eccentricity,the initial cracks occur mostly at the horizontal cracks in the flange surface,and the cracks in the web wall gradually develop into diagonal cracks in the wall,and finally the cross cracks are formed.Laminated plate T shear wall in the web pressure when more brittle damage,small eccentric damage.In the non-linear working state,it is concluded that the bearing capacity of the eccentric specimen is smaller than that of the axialcore(TW-2 ultimate bearing capacity is higher than that of TW-5 less 25.8%),with the increase of eccentricity,the stress decreases,the bearing capacity is smaller,the stiffness is more fully degraded.Eccentric compression components energy consumption is slightly greater than the axial pressure and energy consumption.Ductility coefficient contrast,with small eccentric damage,large eccentric damage deformation ability.And the laminated plate T] shear wall is consistent with the failure characteristics of the cast-in-place shear wall.Under the influence of eccentricity,the crack propagation,stress distribution,Hysteresis curve,skeleton curve and bearing capacity of T shear wall with different axial compression ratio and concrete strength can be obtained.With the increase of axial compression ratio,The bearing capacity of the T shear wall is improved,but the extension becomes smaller and the deformation capacity is deteriorated.Improve the strength of concrete,the T shear wall of the laminated plate has little effect,bearing capacity will increase.