Seismic Performance Analysis Of Reinforced Concrete Frame Structure With Transfer Floor

The high-rise building develop to integrate the functions of commercial?catering?amusement and office.Such comprehensive multi-functional buildings with conversion layer reinforced concrete frame structure can be used to design,and the study in such structure mainly focused on low intensity region,more severe earthquake effect,small span analysis of elastic stage,so the seismic performance analysis at a high inte nsity area with conversion layer of large span reinforced concrete(not less than 18 m)frame structure under more severe earthquake action of the transfer layer optimal Settings and analysis of elastic stage under severe earthquake action will be very meaning ful.Using actual engineering as the background,a model M3 in 8 rigion seismic fortifiction of large span reinforced concrete(18m)frame structure with transfer layer is established in this paper by PKPM.Combining with SATWE module,analyzed the static seismic performance of the model.The results shows that the torsional destruction will not occur in Model M3?the interstory drift numerical value mutates around the transfer layer?the value of the shear-weight ratio increases by the increase of the floor;The structure meets the requirement of antidumping and equivalent lateral stiffness ratio,structure arrangement and stiffness design in the vertical direction is reasonable.Discussed he influence of transformation layer height,equivalent stiffness ratio,and transformation beam section size on seismic performance of structure.The results shows that when transformation layer position is a constant value,with the increase of the equivalent stiffness ratio,the structure of the natural vibration period decrease? structure top floor displacement amplitude decrease? the mutation degree of interlayer displacement Angle decrease.By the increase of the depth of the transfer layer,the natural vibration period?the maximum floor base-shear value?the floor shear-weight ratio value has almost no change.By the increase of the width of the transfer layer,the mutation of the interstory drift of the transfer layer become obvious,the maximum interstory drift decreases a little.Choose the transfer layer structure in the third floor and set 1200×2500mm as the transfer beam section size is the most economic and reasona ble model.Modeling the structure by using ANSYS,choose two groups of seismic wave to input on the X direction of the structure for Elastic time history analysis of the structure.The result shows that,each of the seismic time history analysis base shear value and its average can meet the requirements of the relevant specification.Push program is respectively adopted to model M3,M5 static elastoplastic pushover method overall seismic performance analysis.The results shows that,with the increase of conversion layer position,the performance points corresponding to a plastic hinge model performance in reducing,floor maximum interlayer drift decreased and the ability of the model of resisting strong earthquakes is reduced.The plastic hinge occurring order of the structure meets the requirement of "strong shear weak bending".Adopts Epda program to calculate dynamic elastic-plastic analysis for Model M3.The results shows that,the maximal interlayer drift value under the action of 3 earthq uake waves is less than "the rules" limit 1/50,this large span frame beam transfer structure under strong earthquakes will appears obvious plastic deformation,a moderate damage occurs,meet the "strong seismic no fail" requirements for seismic resistance.To a certain extent,the static elastoplastic analysis results and dynamic elastoplastic analysis results can be verified by each other.