Steel Frame-Prefabricated High Ductility Concrete Wall Of Lateral Resistance Structural System

Steel Frame-Prefabricated High Ductility Concrete Wall of Lateral Resistance Structural System(SPHDCW)is a kind of composite structural system,which has improvement seismic behavior by itself than excellent deformation capacity and high energy dissipation capacity.SPHDCW is consistent with the construction industry of the big situation and has broad application prospects.But at home and abroad the study of the SPHDCW structure is rarely enough to provide sufficient basis for the application of SPHDCW structure.Therefore,study on the hysteretic behavior of SPHDCW structure is not only of great theoretical significance,but also a certain engineering value.In this paper,a new method of pre fabrication is presented,and the structure of SPHDCW is studied by means of experimental study and finite element analysis software,and the main findings are summarized in the following:(1)This paper designed 3 pieces of the SPHDCW specimen,and the quasi-static tests were carried out to study the failure mechanism,deformation capacity,energy dissipation capacity,etc..Experimental results indicates that: SPHDCW specimen could effectively make use of tensile strain-hardening behavior with multiple cracking of HDC,and control development of shear incline crack and improve deformation capacity,to achieve the replacement of prefabricated structures,reduce or remove the expensive repair expenses after strong earthquakes.(2)The SPHDCW-1 specimens which are connected with the column,the bearing capacity,lateral stiffness,ductility and energy dissipation capacity are higher than the other two specimens.It can increase the ductility of the structure and improve the safety of the structure when the wall is connected with the column.If the structure height and span unchanged,the height span ratio of the inner filled wall is increased,and the performance of the structure is more close to the pure frame,and the bearing capacity is obviously reduced.This paper suggests that it can be based on the actual engineering needs,Choose the high span ratio of the inner wall and whether the inside wall is connected with the column in order to meet the different requirements of the fortification.(3)In this paper,the Abaqus software is used to simulate the results of this experiment,The simulation results of hysteresis curves,skeleton curves,stiffness degradation and crack development trend are compared with the experimental results,both are in good agreement,which shows that the model can accurately predict the performance of SPHDCW structure under low cyclic loading.(4)On the basis of the model of this paper,6 series of specimens were designed by using the same material damage constitutive relation and the modeling method to study the influence of wall thickness,horizontal distribution of the wall reinforcement ratio,joint bending capacity,frame steel strength,axial compression ratio and the position of the inner wall,and other factors on the performance of SPHDCW.