Experimental Study On Bending Behavior Of L-shaped Battened Concrete-Filled Square Tube Composite Column

Compose plate concrete filled steel tube composite column is a new type of column structure,the structure system of "L" shape "?","T" shape columns can be hidden inside the wall,not only can increase the actual usable floor area of housing,but also can give full play to the structure of the composite column concrete filled steel tube structure material with the advantage of cross section..In this paper,the following research is conducted on the bending performance of L-shaped battened concrete-filled square tube composite column:(1)Based on the analysis of calculation theory and numerical simulation of L-shaped battened concrete-filled square tube composite column,a formula suitable for calculating the ultimate bending capacity of L-shaped battened concrete-filled square tube composite column is deduced based on the relevant literature and theoretical analysis.(2)The finite element analysis software ABAQUS was used to conduct numerical simulation analysis of L-shaped battened concrete-filled square tube composite column.By comparing the finite element analysis results with the theoretical calculation results,the feasibility of using superposition theory to calculate the ultimate bearing capacity of L-shaped battened concrete-filled square tube composite column was preliminarily verified.(3)On the basis of theoretical calculation and finite element software simulation analysis,the bending behavior of six groups of l-shaped composite columns of concrete filled steel tube was studied,by changing the batten plate area,mount point Angle and the different positions of batten plate,monotonic static loading test specimens of different variables.Through the monotonic static loading test,the bending mechanical properties of L-shaped battened concrete-filled square tube composite column were studied,and the failure modes and ultimate bearing capacity values of different specimens were analyzed.After the experiment,by observing the experimental value and the simulated value,it suggested that the finite element simulation value of ABAQUS was in good agreement with the experimental value.(4)Through theoretical analysis,experimental study and numerical simulation,it is concluded that the L-shaped battened concrete-filled square tube column has good mechanical properties and stable failure mode,and the experimental results and finite element analysis results are basically consistent with the calculated formula results.