Study On Connection Performance Of Shear Wall Thermal Insulation Based On ABAQUS

The thermal insulation system of shear wall is a kind of building heat insulation and wall enclosure,which can realize the same life span of building heat preservation and wall,and accord with the technology of building energy conservation and structural integration.The building energy saving system promotes the wall innovation policy implementation.Among them,the connectors are the key parts of the shear wall insulation system to ensure the internal leaf concrete,the insulation layer,the outer leaf concrete to work together.At the same time,the connectors are also the main components to separate the wall panels under the wind load and earthquake.Therefore,the connectors play an important role in improving the overall performance of the insulation wall.At present,the research on seismic performance of shear wall insulation system is mainly focused on static performance,and the research on connectors is mainly focused on the form,spacing,material and so on.However,there are few examples of shaking table test on connection structure of shear wall insulation system under real seismic action.Therefore,in order to explore the different connection structure forms of the system under seismic action,Based on the research project of building energy conservation and structural integration system in Shandong Province,and the widely used IPS(Insulation Panel in shear wall)insulation system,the influence on the time-history response and seismic performance of the structure is studied in this paper.IPS composite heat preservation system for cast-in-place concrete shear wall and FS(Formwork system)for external formwork is an example.The shaking table test of seismic simulation was carried out.The numerical simulation analysis of the test model was carried out with the finite element software ABAQUS,and the simulation results were compared with the experimental data.The specific contents of this paper are as follows:(1)The shaking table test of IPS self-insulation system and FS composite thermal insulation system is carried out.The variation parameters are the existence or absence of internal connectors of the same structure,two different structural types and three excitation waveforms.Three kinds of acceleration peak values.Three specimen models of 1: 1 in IPS-1(IPS self-insulating system with internal connectors(IPS-2 and IPS)without connectors are made.(2)The test results of different specimens are compared and analyzed.The acceleration time history responses of IPS-1 and IPS-2 specimen models under different seismic waves are compared and analyzed,and the influence of the connectors on the structure is obtained by comparing and analyzing the acceleration time history response of the two specimen models under the action of different seismic waves.The acceleration time-history response and displacement time-history response of IPS-1 and FS models under different seismic waves are compared and analyzed,and the differences of structural responses under different types of thermal insulation structures are obtained.(3)The finite element software ABAQUS is used to calculate and analyze the above test model,and the constitutive relations,the selection of elements and the values of relevant parameters in the process of modeling are analyzed.In the analysis,the IPS-1 model of shear wall insulation system of 1: 1,IPS-2 model are established.The time-history response of the two models is analyzed.In order to provide the basis for the selection of relevant parameters,the simulation results are compared with the experimental results.Through the exploration of the above content,the following conclusions are drawn:(1)during the test,the three specimens of IPS-1,IPS-2,FS have not been destroyed under the action of El Centro wave or Rg wave with a peak acceleration of 0.1g,0.15 g,0.2g,respectively,and the synergistic deformation ability of the specimen is better.These three structures can be used in the case of a basic earthquake with a fortification intensity of 7 degrees and a rare earthquake of 7 degrees and an earthquake of 8 degrees.(2)under the same seismic intensity and different excitation waveforms,there is a large gap between the maximum response of acceleration and displacement time history of the structure,which indicates that the connection form of the insulation layer and the excitation waveform of the specimen have great influence on the response of the specimen.(3)under the action of the same seismic intensity,the acceleration time history response of the specimen is gradually strengthened along the height direction,and the acceleration time history response of the specimen increases gradually when the seismic intensity increases gradually.(4)under the action of the same excitation waveform,the acceleration time-history response of the specimen with the same seismic intensity is larger than that of the IPS-2 specimen,which indicates that the existence of the connectors increases the stiffness and integrity of the specimen.But it also increases the maximum acceleration response of the specimen.(5)the change of acceleration time history response of FS specimen under different excitation waveforms is more complex,but there is no obvious rule of time history response under earthquake action.(6)the relative error of the maximum acceleration response between the finite element model and the test results is within 17%,the trend of the time history curve is consistent,and the results of the finite element model are in good agreement with the test results.