Research On Seismic Performance Of Frame-Core Tube High-Rise Building With Local Switch On The Top

With the increasing demand for building function and its appearance,the transformation storey was used by high-rise buildings.In our country,beam transformation storey,slab transformation storey and truss transformation storeys are used widely.And the researches on these fields are complete.But there are few materials which was research on structure that has local transformation storey at the top of building.The local indentation conversion on tops can change the matchbox invariable architectural form therefore it can meet people's requirements of the architectural appearance.Reinforced concrete high-rise building with local indentation conversion on tops,whose rigidity decrease suddenly at the place where the local switch of indentation starts.Its structure form makes irregular on the vertical.So under the action of earthquake,its form has complex features on stress.Fixing up the transformation storey as significant part of structure reasonably,can play a huge important influence on the structural seismic performance.So to ensure the earthquake resistant behavior of high-rise buildings with local indentation conversion on tops,to assess its structure's reliability under strong earthquake and to research the structure's earthquake resistant performance impact by the local transformation storey's location and its amount,are the problems worth our explore extremely.Tis article bases on using JiNan the cape of hope business integrated office building A as engineering background,to set up entity model with PKPM.This paper building A structure as an example to make seismic elastic analysis and elastic time history analysis of small earthquake and adopted the dynamic elastic-plastic analysis methods to calculate stress and deformation of the high-rise structure under the action of earthquake in Hampshire.Then set up other structure schemes with different transition position,discussing the seismic performance on transformation layer position.According to the all discussing about,the main conclusions are drawn:(1)The JiNan the cape of hope business integrated office building A's rational distribution of weight causes less torsional effect.Its structure form makes regular on the vertical,so the structure has no week link.Foraasmuch the building has enough safety reserve energy,and it will not collapse under strong earthquake.(2)The three structure schemes with different transition position and the structure schemes with no transition have less diffident in dynamic characteristics.Through contrastive analysis of four structure schemes we can found that under earthquake their analyze data meet the relevant specification requirements.In consideration of their structural rationality,lateral stiffness and safety reserve energy,the structure schemes with no transition is better than others.(3)Under frequent earthquake,structure schemes with different transition position has less effect on the structure's earthquake resistant performance.But under earthquake in Hampshire,the buildings' lateral stiffness,torsional strength and safety reserve energy decrease with layout conversion layer position down.So the building with local indentation conversion on top whose position lower has worse effect on the structure's earthquake resistant performance.