Reinforced Concrete Column Embedded With Spatial Steel Frame

Reinforced concrete column embedded with spatial steel frame is a kind ofindependent type SRC columns based on lattice type steel reinforced concrete column.Most people usually regard this type as the ordinary to calculate, but in fact the studyof spatial steel frame concrete structure which is proceeded by our research group, wehave found that concrete of core area is constrained strongly by spatial steel frame,which improves the performance of spatial steel frame concrete structure in everyaspect. Based on the study of our research group, it will no longer confined to theassembling reinforcement cage effect, but as the core steel reinforced, and focuses onthe research of embedded spatial steel frame seismic performance of steel reinforcedconcrete column.The subject completed the seismic behavior tests of contrast which contains5steel reinforced concrete columns under cyclic loading of low loop, the types of thesecolumns are3built-in spatial steel frame reinforced concrete columns,1buried steelconcentrated layout (similar to the I-beam) steel reinforced concrete column,1built-in square steel tube filled with steel reinforced concrete column. Failure modesof the specimens, the hysteretic curve, skeleton curves, energy dissipation capacity,displacement ductility, and stiffness degradation of bearing capacity and seismicperformance is analyzed, and it shows that, under the same condition,1.with thedecrease of axial compression ratio, hysteretic curve is full, stiffness and bearingcapacity degenerate slowly, energy dissipation and deformation capacity is good.2.With the increase of steel reinforcement ratio, the hysteresis curve is more full,stiffness and strength degenerate more slowly, and ductility is better.3.the effect ofdifferent forms of steel which are buried in the columns are great,the bearing capacityand ductility of embedded spatial steel frame columns are stronger than steelreinforced concrete columns whose arrangement of angle steel is centralized.the validation of the test were analyzed by ABAQUS finite element software,and do multiple sets of simulation analysis based on the axial compression ratio and the ratio of steel and buried steel form, to make up for the shortcoming of testsamples, as well as the test conditions, test results can not be achieved. the resultshowed that with the increase of axial compression ratio, specimen early rigidityincreased, and the binding effect of high rate steel specimen on the core concrete isbigger, steel reinforced concrete column steel frame embedded space constraint on thecore concrete is stronger than the built-in centralized arrangement angle.