With Strengthened Stories Frame-core Wall Structure Stress Performance Analysis

With the development of science and technology and the progress of society, thehigh-rise building has been developing rapidly at home and abroad since the late1990s.The modern high-rise building is not only developing towards to multifunction,multipurpose and beauty, but the height of building is also increasing by degrees, thearchitectural form is becoming more and more novel and the structure stress situationis becoming more complex as well. The complex form brings new challenge tostructural engineers and puts forward higher requirements to structural design. In orderto enhance the integrity of the structure, reduce the structural lateral displacement,balance the axial force of frame column, alleviate the effect of hysteresis phenomenon,the frame-core tube structure with a strengthened layer is applied more and morewidely. However, its shortcoming is also very obvious. For example, the reinforcementstress is complex, the stiffness changes in the position of reinforcement layers, easy toform a weak layer, which must pay enough attention to. Also, the strengthen layerselection needs to be considered carefully.Referring to related literature of theoretical research, this paper uses MidasBuilding to establish a three-dimensional finite element model based on a constructionproject in Hefei, Anhui, comprehensively studying on the mechanical performance ofthe structure. The main work of this paper is shown as follows:1．Introduce the practical application and theoretical research of the frame-coretube structure with strengthened layer at home and abroad, state the forced mechanismof strengthened layer in structure, summarize the concept as well as the advantages anddisadvantages of the strengthened layer.2．Analyze the response spectrum through different models under the frequentearthquake, make comparison of structural circle, displacement and force amongdifferent numbers of strengthened layers, different numbers of strengthened layerswaist truss, different numbers of cantilever truss. Sort out the mechanics index of thestructure of each model under frequent earthquake, make comparison and analyze tofind out the optimum strengthened layer and to explore its causes.3. As the shear lag phenomenon exists generally in frame-tube structure, it needpay more attention on the structure design to mitigate its adverse effects, or there is a big security risk. This paper analyzes effect of different strengthened layer on the sharelay phenomenon of structural corner column, summarizes response spectrum results ofdifferent models, contrasts structural force, and discusses the influence degree ofhysteresis angle shear in different models.4. Optimize the strengthened layer of the frame-core tube according to thestiffness mutation. Summarize the research conclusion and put forward correspondingsuggestions for the structural design of the frame-core tube with strengthened layer.Analyze the shortcomings of this paper and research direction in the further study.This paper analyzes the mechanical performance of different frame-core tubestructures with strengthened layer, summarizes the concept of strengthened layer andits advantages and disadvantages, and provides some theoretical value and referencesuggestions for the design of similar high-rise building.Figure60table36reference52...