Influence Of Strengthened Story On The Mechanics Behavior Of Frame-corewall Structure

At present, in the high-rise, super-tall reinforced concrete frame-core tube structure, strengthened story most used real abdomen beam, the reinforced concrete vierendeel truss strengthened story application less, also lack the system the research analysis. This paper takes a typical of the frame-core of39-story structure model as an example.In the14and27, respectively, and39(top story) each decorate a Soil vierendeel truss strengthening, Using three dimension finite element analysis software ETABS program, the model, horizontal load (Including wind load and earthquakes) time history analysis, key research:1、To take different internode decorate a form of arms outstretched vierendeel truss frame-core tube structure. Analyzes the web members to decorate a form arms outstretched vierendeel truss stress their influence on the property of oneself,.Contrast analysis shows that oneself web members among the distance between both sides, such as decorate form distance type stress are uniformity.2、Analyzed the arms outstretched vierendeel truss the strengthened story abdomen pole, chord stiffness on the structural force performance influence.Analysis shows that, vierendeel truss abdomen pole, chord stiffness changes on the frame-core tube structure bottom shear and moment the impact is little,But to structure the displacement of vertex affects obviously.And open-web truss chord stiffness on structure displacement effect than the vertex abdominal stem stiffness.3、Analyzed the arms outstretched vierendeel truss the strengthened story chord change the height of the section on the structural force performance influence.First of all, this paper analyzes the three strengthened story chord section height and the influence of the change at the same time,The results show that chord changes of frame-section height the frame-core tube structure of the vertex displacement, bottom shear and moment impact is bigger; Secondly, this paper analyzes the three strengthened story chord section height change one at a time, the influence of respectively.Results show that different locations of the strengthening chord changes to the structure of the cross section height affect different.When the bottom layer chord section height changes the biggest influence.