| In order to study the impact of grouting sleeve node failure on the seismic performance of the structure,a commonly used standard unit component was first taken for finite element simulation analysis,and the performance changes caused by the failure of the prefabricated shear wall grouting sleeve node were explored,and the relevant parameters were equivalent.Subsequently,the residential building of a residential area was selected as the research object,and the general structural analysis software was used to establish a structural model of the whole building,and the sleeve grouting node of the prefabricated shear wall was equivalent in a cross-sectional and equivalent manner on the basis of the single component research,so as to study the change of the seismic response under the failure of the vertical node of the prefabricated shear wall component,and the main research content and results were as follows:（1）Using finite element simulation software to simulate and analyze the standard element components,this paper uses the plastic damage constitutive（CDP-model）of ABAQUS to simulate the nonlinear behavior of concrete,and the finite element model is established according to the characteristics of the cast-in-place process,and the model of the reinforcement cage and the shear wall is established,and then assembled,and the reinforcement cage is embedded in the concrete by the epimedied method and finally connected to the ground beam to establish a solid model for simulation.In this way,the effect of prefabricated shear wall grouting sleeve node failure on the horizontal stiffness of the overall structure is investigated.Based on the existing theoretical research at home and abroad,this study analyzes whether the simulated components can meet the seismic performance indicators in the elastic and elastoplastic stages under different connection conditions by changing the boundary conditions of the component units.（2）The structural design analysis software is used to establish a model,and an 18-storey standard residential building is selected as the research object,and the impact of the failure of the wall sleeve node is simulated by using the finite element research simulation results to reduce the thickness of the wall.The reference model of standard wall size and the experimental group model obtained by reducing the thickness of the wall model were established,and the seismic performance and timecourse analysis method of the two models under the conditions of small earthquakes were compared with each other,respectively.The calculation results（period,mode shape,structural displacement,etc.）under the two working conditions were compared,and the specific changes in the seismic performance of the prefabricated shear wall under the influence of the connection defects were analyzed.（3）The results show that the elastic analysis of the structure under the simulated defect under the condition of small earthquake,the degree of weakening of seismic response indicators such as period,displacement and bearing capacity is relatively limited,the loss of overall performance is small,and the self-vibration period and the maximum shear bearing capacity of the floor caused by the uneven distribution of the construction stiffness of the shear wall in the experimental model will cause a nonnegligible impact.For the elastoplastic analysis under the earthquake,the above indicators have been greatly reduced,and the degree of damage of the components has been significantly deepened,especially the damage to the underlying construction is the most serious（4）Finally,combined with the simulated seismic performance effects under various working conditions,the article gives suggestions for strengthening the prefabricated concrete shear wall according to the damage effect under the defects.Figure 48;Table 10;See 52 articles... |
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