Experimental Study On Seismic Behavior And Nonlinear Analysis Of Spatial Steel Frame Concrete L-shaped Columns

The load-bearing lightweight steel structure is built by welding the transverse and inclined lace bars on longitudinal chords, which is called the spatial steel frame. The concrete structure with spatial steel frame is gained by substituting.In order to study on the seismic behavior of spatial steel frame concrete L shaped column, including its bearing capacity, deformation capability, ductility as well as failure mechanism, the comparison of the tests of 4 the spatial steel frame concrete L shaped columns and 1 reinforced concrete L shaped column subjected to the low cyclic reversed load are carried out. The results of the tests showed that the shear capacity of the spatial steel frame concrete L shaped column is basically the same as that of the reinforced concrete L shaped column, but the ductility of the spatial steel frame concrete L shaped column is better than that of the reinforced concrete L shaped column, when horizontal load direction is parallel to column limb. The shear capacity of the spatial steel frame concrete L shaped column under different directional cyclic loading is lower than that of the spatial steel frame concrete L shaped column under parallel directional cyclic loading, Besides the oblique cross-section shear capacity is reduced with the load angle increase from 0 degrees to 45 degrees.On the basis of the experiment, the spatial steel frame concrete L-shaped column analyzed by the ABAQUS. The calculation results by computer coincide with the experimental results. It`s demonstrate that the nonlinear finite element analysis of spatial steel frame concrete L-shaped column can simulated by the ABAQUS.The nonlinear analysis of the spatial steel frame concrete L-shaped column is analyzed by ABAQUS finite element. Besides the bearing capacity and deformability of the spatial steel frame concrete L-shaped column are carried out by the effects of the reinforcement form, axial-load ratios and the concrete intensity. The analysis can indicate that adding the spatial steel frame can improve the bearing capability and the ductility. The bearing capability of spatial steel frame concrete L-shaped column is increasing as the reducing of the axial-load ratios. The characteristic number of shear bearing capability is decreasing as the growing of concrete intensity. The shear bearing capability of spatial steel frame concrete L-shaped column is growing as the growing of loading angle.