Study Of Seismic Performance Of A Kind Of New Type Steel Frame Structure Assembly Floor

Standardization of building assembly is one of the policies that China is strongly encouraging to implement.Based on the steel frame structure,this paper presents a fully assembled concrete floor form.Compared with the traditional cast-in-place concrete floor,the wet operation condition is greatly reduced and the construction speed is faster.And because the floors are all prefabricated by factory,this form has several advantages such as stable production environment and good quality,the big stiffness and small thickness of the floor itself is conducive to the promotion of the net floor height and so on.However,in the course of hoisting,it is necessary to adopt the method of anchoring steel anchor and pouring in the connection between the floor,the beam,the column and other components so that the weak layer of the component can not be avoided.This kind of weak layer can produce stress redistribution under the effect of seismic horizontal load.In this paper,ABAQUS finite element analysis is used to study the contrast of this kind of all-assembly new floor board and traditional castin-place floor,analyze the mechanical response(top displacement,weak layer stress,beam stress,etc.)and compare with the traditional cast-in-place floor under the same circumstances.This paper mainly carried out the following works and reached the conclusions:1.Access to a large number of domestic and foreign literatures on the steel floor,summarized the status of research of these literatures and made a summary.2.By choosing appropriate finite element modeling parameters through the literature,and through the use of these data for different finite element modeling and analysis of the results of literature in the experiment,compared the results with the references,and demonstrates the feasibility of these parameters.3.Based on the ABAQUS finite element analysis software,three three-layer steel frame structures were constructed and studied numerically.Three different structural models of floor are built individually,and then being analyzed for the mechanical response under seismic load separably through time-history analysis.In the verification process of concrete stress,three models are "fully cast-in-place","fullyassembled",and "semi-assembled".Two other models,"full-assembly non-contact" and "semi-fabricated non-contact," were added when verifying the stress of steel bars.4.According to the results of finite element analysis of the three data comparison,the comparison shows the precast floor slab of relatively conventional cast-in-place floor on integral stiffness slightly difference,but has certain advantages in plate internal stress,etc.Therefore,it is recommended that the designer should pay more attention to the rigidity of the overall structure,so as to ensure the best advantage of this new type of assembly floor.This study preliminarily has a qualitative understanding of a steel structure assembly floor,which has a certain value in the structure direction of the actual project.Finally,based on the finite element analysis experiment,the applicability of further refinement of finite element model is prospected.