Seismic Performance Analysis On Planar Asymmetric Frame Shear Wall Structure

With the wide use of the frame-shear wall structure, forms of structure layout havebeen more diverse to meet the function of the high-rise, and one typical form is L-shapeand rectangular frame-shear wall structures with asymmetric layouts of the transportbox. Due to the effects of seismic torsional component, for transport boxes of these twostructures with asymmetric layouts, non-coincidence of their centers of mass and centersof stiffness results in torque failure. Therefore, such a challenge should be takenseriously during the design of structures. In order to decrease the torque failure of thesetwo structures resulting from seismic activities and meet the requirements ofsymmetrical and uniform layout for shear walls, in this paper, we developed threelayouts of shear walls by changing the position and quantity in PMCAD, and chose tworelatively reasonable of them based on comparison in SATWE analysis. Between thesetwo chosen layouts, the elastic time-history analysis was deployed in PMSAP to selectthe one with better elastic performance, which was finally analyzed for elastic-plasticperformance using PUSH&EPDA.The main content in this paper is as follows:(1) The actual engineering situation and structural design problems under theconstraint of the construction function are stated, and the factors which affect theproblem and methods of structural seismic performance analysis and computationalanalysis software are introduced.(2) In order to realize the seismic security of dual lateral system, the beststructure design scheme was chose to strengthen the the seismic performance of thesecond line defense of the frame shear wall structure (frame structure of beam andcolumn stiffness). SATWE was used to establish two kinds of structure models withdifferent shapes (L, rectangule). On the premise of the overall stiffness distribution, inorder to satisfy the layout principle of the shear wall, the number and length of the shearwall at the bottom edge, the period ratio, displacement ratio and eccentricity ratio ofeach layout scheme were compared by changing the location, the rationality of the shearwall layout is judged, and the suitable layout scheme of the shear wall was chosen. (3) Because of the two structures total height are more than100m, which needselastic time history analysis under severe earthquakes. Four different seismic waveswere selected according to the actual site condition, PMSAP and SATWE are used toelastic dynamic time history analysis for the different kinds of the structure, and theinfluences of the different structures (L, rectangle) under different seismic waves wasanalyzed.(4) PUSH&EPDA is used for elastic-plastic analysis of the scheme of two kinds ofstructures under the severe earthquakes. The weak layer of the structure is analyzed, andthe corresponding measures should be taken to strengthen the structure. This paperprovides a reference for other similar practical engineering design.