Analysis On Mechanical Behavior Of Concrete Short-pier Shear Wall Structures Based On SAP2000 Procedure

Technical specification for concrete structures of tall building(JGJ 3-2002) has given the explicit definition that short-pier shear wall structures' depth-thickNess ratio is about 5-8 and its thickNess is no smaller than 200mm.As a new form of high-rise residential structures,Short pier shear wall based on the original wall draws on the merits of a framework structure,At the same time,in large measure to overcome the shortcomings of the two structural forms.The structure is not only able to meet the large bays,flat and flexible room layout,interior columns or beams are not exposed, etc.,but to meet the application requirements and economic demands.Therefore,in recent years is more prone to favor the owners and occupants.However,research in the theory is still in the exploratory stage,the lack of systematic research.Short pier shear wall at this stage of the study also reflected in the main components of the study,but the overall research is few.In this paper,the large-scale general-purpose structural analysis and design software SAP2000 is used,simulated and analyzed the commonly used short-pier shear wall of reinforced concrete structure model and the general shear walls model under seismic loading,and analyzed the both modes under the earthquake performance of power.Combined the results of nonlinear analysis and used the existing formula calculation to compare,given reasonable proposal modal equations and design requirements.Major ones are as follows:Select 4 kinds of seismic analysis such as El Ccentro seismic waves,earthquake in Tangshan seismic waves in two-component,Lanzhou seismic waves 3,and use the method of FNA for non-linear time history analysis to get the corresponding vibration mode diagram,the deformation maps and the foundation reaction graphs. Plans for the formation,combined with vibration mode shape-based information and the quality of the participation coefficient,based on the existing standards to analyze the reasonableness of the two structures and comparison the deformation of them.Can be know the weak parts of the short-pier shear wall construction is the seismic plane of the corner edge in the wall department.When a reverse effect,it will aggravate the existing warpage to the first wall cracking.Therefore,we should strengthen its anti-seismic structural measures,such as reducing the axial compression ratio, increasing the longitudinal reinforcement and stirrups such as the reinforcement ratio. Plans for the deformation maps,make use of the layer-displacement data and the curve between the two different structures to compare and analysis under the role of seismic waves.Can be know the short pier shear wall structure under the North-South seismic performance of the anti-side is better,the role of seismic waves in the east-west displacement curve between the lower than unreasonable.This requires in the design of the structure of short-pier shear wall system,wall to be a reasonable layout,with particular attention to large bays Department to deal with the wall,increasing the number of vertical shear.At the same time,the largest displacement of nodes is necessary to strengthen or weaken the stiffness of the stiffness of the smallest displacement of the node to reduce the displacement angle in order to meet seismic requirements.Plans for the the foundation reaction graphs,comprehensive the data of the foundation reaction to review the two structures.Can be know the vertical stiffness and quality of the short-pier shear wall change in a more uniform,there are no major mutation,a more reasonable structure.So as to get the strengths and weaknesses of the short-pier shear wall structure comparing to the general wall.And to consider the actual design of strengthening measures to be taken in order to meet seismic requirements,so that short-pier shear wall can better promote the use of in the earthquake zone.