| In recent years,the country has vigorously promoted the assembled structure,and the steel plate combination shear wall has been widely used in practical engineering due to the advantages of convenient construction and good seismic performance.In order to reduce the common cold bridge effect of the steel plate combination shear wall,a company proposed a new type of assembled thin steel plate combination shear wall structure.At present,the team has completed the test and numerical simulation analysis of shear wall components and shear wall-steel coupling beam composite layer,confirming that the shear wall has superior deformation capability and energy dissipation ability.This paper mainly studies the mechanical properties and seismic responses of the new thin steel plate combined shear wall structure,and the contrast analysis of the seismic performance of the steel tube bundle structure,providing theoretical foundation for the promotion and engineering application of the new steel plate combination shear wall structure.The main research content and conclusions of this paper are as follows:(1)The ABAQUS finite element software is used to establish a thin steel plate combination shear wall model on the basis of a suitable constitutive relationship and the correct boundary conditions.The finite element simulation results are compared from the test results from the lag,the skeleton curve,extreme bearing capacity and damage mode,and the two are good,verify the reliability and accuracy of finite element models..(2)Taking the layer high and coupled ratio CR as the study variable,9 thin steel plate lipples combined with shear wall structural examples were designed and established.The analysis results show that all structures meet the mechanism of "two-seismic defense lines of steel" and wall limbs,and the maximum interlayer displacement angle under the earthquake is basically satisfied with the limit requirements,verify the rationality of structural design.(3)The seismic performance of nine thin steel plate coupled composite shear wall structural models was analyzed by the combination of static elastic-plastic analysis and dynamic elastic-plastic time-history analysis.The pushover curve in static analysis,the overall yield state,the development law of internal force of wall limb,the development law of CR,and the maximum interlayer displacement angle and damage in dynamic time history analysis were studied.CR has a certain influence on the seismic performance of the steel coupling beam yield ratio,overall deformation capacity and yield mechanism of the new steel plate coupled shear wall structure,but the sensitivity of the structure with different storey heights to the change of coupling ratio is different.With the increase of CR,the damage degree of wall limb increases.However,for the 16-20-story structure,smaller CR is easy to cause the bottom of the wall limb to yield more easily and the yield range is large.Considering the deformation capacity and yield condition,it is suggested that 40 % CR is recommended for the 12-layer structure,and larger coupling ratio is recommended for the 16-20-layer structure(CR > 50 %).(4)In this paper,there is a comparison of three different limb shear wall structures and C-16-50 example structures for seismic performance.The results show that all structures meet the yield mechanism of "double seismic fortification".A more reinforced concrete shear wall structure,three steel slabs have higher bearing capacity and ductile wall structure,and even the beam consumption capacity.The C-16-50 structural seismic performance is slightly weak in the steel tube bundle structure,but the utilization rate of the steel joint beam is high,so the overall seismic performance of the thin steel plate combination shear wall structure is good,and it can be promoted in the actual engineering. |
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