Optimization Design Of Frame Structure With Shear Wall Reinforcement

From the current infrastructure of the new phase into a new stage and a new combination of reinforcement,seismic retrofit has become the focus of the present study.Shear reinforcement method can improve the overall seismic performance of the structure,but also to avoid the cumbersome process of the construction of the reinforcement member individually.Therefore reinforcing frame shear wall structure with high practical value.The main contents of this paper are:(1)Learning about the theoretical reinforcement design specification.(2)the use of software to analyze PKPM original frame structure,checking the original seismic performance under the new specification,(3)presented four kinds of shear reinforcement program SAP2000 software using the four models modal response spectrum analysis,research each model shear weight ratio,stiffness ratio,period ratio between the elastic layer displacement angle and other parameters.(3)using four models PKPM to calculate the seismic parameters,combined with SAP2000 finite element analysis results for such reinforcement designed to provide a reference.The main conclusions are as follows:1)The original frame structure maximum interlayer displacement Angle is 1/541.The four kinds of solutions after reinforcement,the structure of the maximum interlayer displacement Angle of 1/1071,1/869,1/1313 and 1/869 respectively,meet the "code for seismic design of buildings GB50011-2010 regulations limit is 1/800.Plan a wall limb area and floor area ratio is 1.43%,2 wall limb area and floor area ratio is 0.93%,visible central scheme ii remove shear wall wall limb,maximum interlayer displacement Angle is the most close to the specification limit,the scheme optimization;Plan three with a wall body area and floor area ratio is the same,the location of shear wall arrangement by offshoring structure internal to the four comers around,visible structure around the corners of shear wall,can significantly reduce the structural maximum displacement Angle between the layers.2)Cycle than the original frame structure is 0.91,beyond the specification limit is 0.9,the period of the structure after reinforcement ratios were 0.79,0.74,0.63,1.05,model four cycles than still does not meet the requirements of shear wall in the middle of the visible impact on the cycle than smaller,around the corners of shear wall of cycle ratio influence;Decorate in the structure around the corners of shear wall,can significantly control the torsion effect of the structure.3)Scheme and scheme 2,a wall body area and floor area ratio is 1.43%.Remove the middle part of the shear wall,wall body area and floor area ratio is 0.93%.Tthe minimum cut weight ratio decreased from 0.0858 to 0.0655.The minimum cut weight lower than 24%,visible change on the structure of shear wall quantity cut weight ratio influence;Plan a and the wall of the three limb area and floor area ratio is 1.43%,the minimum cut weight ratio increased from 0.0858 to 0.0858,the minimum cut 6%heavier than the changed,visible changes on the structure of shear wall position of shear than less affected.4)Compared to SAP2000 finite element analysis results with PKPM analysis,found the PKPM calculation of cut about 16%heavier than partial structure,stiffness ratio of the maximum horizontal displacement,and cycle than about 7%.It can be for reference in engineering design.