Study On Design Of Frame-supported Short-leg Shearwall Structure With Haunched Transfer Beam

At present, the research on the seismic behavior of frame-supported short-leg shearwall haunched transfer beam structures are mainly restricted by the experimental study.So this thesis, based on the previous experimental researches, using the finite elementanalysis software ABAQUS to analyze by finite element of seismic behavior undervertical loading or low cyclic loading. By comparing the numerical simulation resultswith experimental results, verify the reliability of ABAQUS in the analysis of theseismic behavior. And use ABAQUS by changing the parameters such as axialcompression ratio, span-depth ratio, ratio of thickness etc. of frame-supported short-legshear wall haunched transfer beam structure to further the study of the influence ofthese parameters on the seismic behavior.This thesis mainly studies the frame-supported short-leg shear wall haunchedtransfer beam structure’s transmission mode,bearing capacity under the vertical loadand structure’s hysteresis curve, skeleton curve, ductility coefficient and bearingcapacity under the interaction of vertical load and horizontal load. Thus when designframe-supported short-leg shear wall structure of the haunched beam type conversion,rational suggestions and construction measures can be put forward.Through finite element analysis results and experiment, the following conclusionscan be drawn:①Under vertical loads, the haunch angle increases and the transfer beamspan-depth ratio reduced will increase the bearing capacity of the structure.②Frame-supported short-leg shear wall haunched transfer beam structure containsreasonable damage mechanism and good seismic performance by rational design. Suchkind of structure has full hysteretic curve, and displacement ductility factor greater than3.0. Whole structural failure mechanism characterized by "strong column and weakbeam, stronger nodes".③With short shear wall is gradually increasing axialcompression ratio, the equivalent yield load, ultimate bearing capacity and failure loadis gradually increased. When the axial compression ratio is0.40~0.55range, thestructural ductility coefficient is high and structure seismic is better.④When the shortleg shear wall thickness ratio increased from5.0to8.0, the equivalent yield load,ultimate bearing capacity, failure load and the initial stiffness were increased graduallyas the ratio of thickness increases. The short leg shear wall thickness ratio within5.5~7.0is reasonable, the structure can satisfy the requirement of structural seismic performance.⑤When the transfer beam span-depth ratio increases from4.7to8.7, theequivalent yield load, ultimate bearing capacity, failure load and the initial stiffness aregradually reduced, the equivalent yield displacement and displacement are diminishing.The transfer beam span-depth ratio values between4.7~7.4is relatively reasonable,displacement ductility is better, and the bearing capacity of decline is not too much, thestructure can satisfies the requirement of structural seismic performance.⑥As thehaunched angle gradually increases, its ultimate bearing capacity and initial stiffnessalso gradually increased. As haunched less haunched, the component displacementductility increased obviously. When the transfer beam haunched angle values in20°to30°, the structure is relatively reasonable and has good seismic performance.