Floor Grid Refinement Division And Podium Floor Stress Analysis Of Multi-tower And Large Podium Structure

Withen land saturated in recent years, the needing performance of the structureis more and more big. In practical engineering super high rise building and complexhigh rise building get more and more applications. The multi-tower and largepodium structure of commercial and residential integration are more and moreusing.The floor is as horizontal component in the structure, bear vertical load andtransfer the wind load in normal use, connect the vertical resist lateral forcecomponentas a whole against earthquakes when the earthquake happened. Accuratejudgement the size and distribution of floor stress is very important for judging theintegrity safety of the structure.This paper choose a frame-corewall structure, using ETABS software andMidas software do response spectrum analys is and elastic time-history analys is forthe structure, analyzing the influence of the floor units classification size on thefloor stress. The analys is results show that floor units classification maximum sizeis1meter can get accurate stress.This paper choose a practicalmulti-tower and large podium structure that aftera simplified, obtaining some Vibration distribution characteristics of multi-towerstructures with big chassissince analyzing the characteristic of structure vibration;get the influence law of tower height ratio change, tower distance change, podiumheight change on the floor stress of the podium floor after response spectrumanalys is.The analysis results show that the vibration mode of the multi-tower andlarge podium structure is very complex, high modes also have higher participate incoefficient, tower’s local vibration and relative vibration in coefficient is small. Thedeformation of he floor with a cross nearby the tower is outside of the p lane, thetower mainly influence the floor nearby the tower with a cross.This paper doing a push-over analys is on a multi-tower and large podiumstructure by using SAP2000software, study the influence of the tower reversemotion that making the podium floor by stretching function and shearing functionon the floor stress of podium floor, including the floor stress distribution, floorstress development rules and the influence on the performance of the wholestructure resist earthquake.The analysis results show that the stress mainlydeveloping very quickly when the tower reverse motion that making the podium floor by stretching function. Floor plastic development and the structural plasticdevelopment is not harmonious, the integral structure of seismic disadvantage.