With Steel Reinforced Concrete Beam Transformation Layer Of High-rise Building Structure Seismic Analysis

In recent years,high-rise building structure has become an increasingly popular contemporary architecture structure，with a transition layer of high-rise building structure have also been supported for developers and owners,conversion layer structure to achieve the top and bottom two different functional and structural transition.By PKPM software,this paper respectively studied two 30 layer with steel reinforced concrete transfer beam and the reinforced concrete transfer beam of high-rise building structure,and two examples respectively was carried out the modal analysi to get the natural vibration period and vibration mode space.Based on the modal analysis results on the structural response spectrum analysis,comparison of the two examples under the action of X and Y directions of maximal interlayer displacement and displacement angle,earthquake total shear and moment in the earthquake,and also analyzed the maximum moment and shear of the transfer beam.In addition,on the basis of the modal analysis of structure studied elastic time history analysis,compared the two examples under the action of seismic wave in three groups of maximal interlayer displacement and displacement angle,earthquake total shear and moment.In addition,compared the maximum and average of elastic time history analysis results and the analysis results of response spectrum method.Also studied the two different kinds of the high-rise building structure of the transfer beam static elastoplastic analysis,it is concluded that the performance point of the floor displacement,displacement angle and shear strain,and plastic hinge developments.Analysis conclusion is as follows:(1)The two different conversion beam structure be integral calculated analysis,it is concluded that two examples cycle is basically the same structure,the basic characteristics under seismic action of the response spectrum analysis and elastic time history analysis are the same.In the X and Y direction,the effective mass coefficient of each vibration mode and maximum interlayer displacement angle under seismic loading are accordance with the requirements of the specification.That the first structure is more advantageous than the second earthquake.(2)Time history analysis method should be adopted for the two examples to verify and supplement the response spectrum analysis of calculation results,and the time history analysis results are greater than the response spectrum method analysis of the results obtained,and according to the results of the calculation of the maximum adjustment,with a transition layer of high-rise building structure can be improved security.(3)The two examples respectively using PKPM EPDA/PUSH program in the X and Y direction and studied the Pushover analysis under severe earthquake,find the performance and the corresponding displacement parameters and plastic hinge mechanism.Test case can meet the fortification principles of "three levels".Conclusions are obtained by calculation results:the two largest interlayer displacement angle of the structure,no more than the standard tolerance value;mostly plastic hinge appeared in the shear wall structure,and Will not cause structural collapse,to ensure that the aseismic "three level" fortification requirements.