Experimental Research On A New Type Of Inclined Column Transfer Structure

A series of theoretical and experimental researches on the application of inclined column transfer structure in frame-supported short-leg shear wall structure and frame-supported shear wall structure indicate that the ductility and energy dissipation of inclined column transfer structure are lower than those of the reinforced concrete beam transfer structure,especially the destruction of the transfer beam between the inclined columns is relatively serious and may cause bad effects on the seismic.Therefore,in order to make the inclined column transfer structure can be more widely used in practical engineering,it is a crucial question that how to strengthen the ductility of the conversion beam between the inclined columns.Aiming at this problem,the text proposes a new inclined column transfer structure with section steel and does a specific analysis on its application in frame-supported shear wall structure.Based on previous research,this paper makes an experiment on a new inclined column transfer structure with section steel whose axial compression ratio of shear wall is 0.3 and the angle of the inclined column is 65 degrees.It is found that the deformation of the specimen is compared with the finite element results during the loading process,new type of inclined column transfer structure appeared plastic hinge firstly at the junction position of inclined column and beam,frame pillar and transfer beam and column.When the structure is destroyed,the failure of the transfer beam between the inclined columns is more serious than that of the other parts.Therefore,it is suggested that the inclined columns should not be too strong when designing,so that the beam's hinges can appear uniformly and evenly,then the inclined columns and frame pillars can enter the plastic energy dissipation,so that the whole structure can enter inelastic deformation and orderly distribute in the whole structure.Through the strain analysis of steel and section steel,it is found that the longitudinal steel of the inclined column and section steel of the transfer beam have a serious yield,especially the section steel is basically in the yielding state,this indicates that the new inclined column transfer structure will have greater bearing capacity and better seismic performance than the ordinary concrete inclined column transfer structure due to the existence of the section steel.From the hysteresis curve of the structure,the degradation of bearing capacity,the stiffness degradation,the ductility and the elastoplastic deformation analysis: the hysteretic curve of the structure is full and has good energy dissipation capacity;the bearing capacity and stiffness degradation are slow,and it can still maintain large bearing capacity and lateral stiffness when the structure fails;When the structure is invalid,the ductility coefficient of both positive and reverse loading is greater than 6,and the ductility of the structure is better.Through the above analysis,the new inclined column conversion structure has good seismic performance.