Seismic Performance Access Of Frame-shear Wall Structures Based On Deformation Index Of Components

The deformation-based seismic design method has been applied to the design of somecomplex out-codes engineering. In the seismic design of tall building structures, the checkingcalculation of bearing capacity as well as deformation under small quakes is usually carriedout by using elastic method. Further, details of seismic design plays a major role in reachingthe goal of ’repairable under moderate earthquake and no collapsing under strong quakes’.Since the actual seismic behavior of structures under rare earthquakes can hardly be preciselyquantified, it is helpful for researchers to learn about the actual damage state under greatquakes and to verify the reasonability of seismic codes by referring to the deformation indexlimits. Moreover, it`s also of great practicability to engineering and codes consummating.This paper mainly consists of the following contents:(1) Develop the pre-post-processing program of Perform-3D and embed the componentdeformation index of reinforced concrete beams, columns as well as shear walls inthe post-processing program so that the component deformation index limits can bedetermined according to the parameters such as the predicted failure pattern, shearspan ratio, flexure shear ratio, axial compression ratio and so on, which provides afeasible solution for the evaluation of deformation-based seismic performance.(2) Firstly, according to Chinese codes, design nine frame-shear wall structures andselect20required seismic waves for each structure to carry out the elastic-plastictime-history analysis. Then make a judgment of the reliability towards the model aswell as the results and make an evaluation of the overall seismic performance withstory drift. Finally consider that the deformation of each structure basically meets therequirements of codes.(3) Get the maximum rotation and the corresponding internal force of each component inplastic zone during the elastic-plastic time history analysis, predict the failure modes,determine the deformation index limits and evaluate the performance states.Calculate the proportion of all components for each structure in different performance state. Performance state of most coupling beams reach Level6orShear: large deformation. The predicted failure modes of more than half shearwalls are Shear failure. The damages of shear walls concentrate on the first floor,and performance state of few shear walls reach Level6or Shear: largedeformation. Performance state of most frame beams are Level1or Level2, andPerformance state of most frame columns are Level1. In general, the first defendantline dissipates energy of earthquake commendably, and the second defendant line canprovide sufficient safety stock.