Study On Seismic Performance Of Office Building Structures With Different Types Of Columns

For the study of reinforced concrete and steel reinforced concrete column two different types of structure seismic performance influence,this paper takes a 7 layer framework building as the basic model,first by PKPM software modeling,analysis of the vibration mode decomposition response spectrum method,flexible schedules and static push of the structure under seismic performance,results show that the structure of the indicators are conform to the requirements of the specification.Then using PKPM software respectively a group of reinforced concrete column structure model is established and a set of steel reinforced concrete column structure model of reinforced concrete column structure model considering the column size,concrete grade,and the effects of parameters such as axial compression ratio,steel reinforced concrete column model considers the column containing steel ratio,concrete grade,and the effects of parameters such as axial compression ratio,through the vibration mode decomposition response spectrum method,flexible schedules and static cycle,cycle ratio,pushed by analyzed the modal participation factor,the floor displacement,the interlayer displacement Angle,shear ratio,displacement ratio and just weight ratio,floor shear and bending performance indexes such as floor,obtained the following main conclusions:(1)The period and inter-storey displacement Angle of reinforced concrete structure decrease with the increase of column size,while the period ratio,minimum shear weight ratio,stiff-weight ratio and ultimate load increase with the increase of column size.(2)The higher the grade of column concrete,the smaller the period and inter-storey displacement Angle of reinforced concrete structure,and the larger the period ratio,minimum shear weight ratio,stiff-weight ratio and ultimate load of reinforced concrete structure.(3)The larger the axial compression ratio is,the smaller the period,minimum shear/weight ratio,stiffness/weight ratio,inter-storey displacement Angle and ultimate load of the reinforced concrete structure are.(4)The higher the steel content grade of column,the smaller the period,period ratio and inter-storey displacement Angle of SRC structure,and the larger the minimum shear weight ratio,stiff-weight ratio and ultimate load.(5)The higher the grade of column concrete,the smaller the period,inter-storey displacement Angle and ultimate load of SRC structure,and the larger the period ratio,minimum shear weight ratio and stiff-weight ratio.(6)The larger the axial compression ratio,the smaller the minimum shear/weight ratio and stiff-weight ratio,and the larger the period,period ratio,inter-storey displacement Angle and ultimate load of SRC structure.Adopts linear function,exponential function and power function of the reinforced concrete column and steel reinforced concrete column model static push and the ultimate bearing capacity of each parameters fitting,got the optimal fitting equation,equation can forecast the ultimate bearing capacity of the structure,the other conditions and got the following conclusions:(1)Under the same other conditions,including the steel at a rate of 4% of the ultimate bearing capacity of the steel reinforced concrete column model than in accordance with the specification of reinforcement design of reinforced concrete column model is about 8.08% higher than that of ultimate bearing capacity,steel ratio and the same situation,the bearing capacity and displacement of steel reinforced concrete column model,respectively,compared with about 40.61% and 13.84% higher than that of reinforced concrete column model;(2)The bearing capacity of the 8% SRC column model is higher than that of the reinforced concrete column model at all axial compression ratios.With the increase of axial compression ratio,the proportion of the ultimate bearing capacity of SRC column model higher than that of RC column model gradually increases.