| Special-shaped concrete-filled steel tube column (T-shaped, L-shaped andcross-shaped) can make the room to avoid sharp edges, improve the roomconstruction area utilization rate, at the same time with ordinary concrete filled steeltubular column high bearing capacity, good seismic performance, the advantages ofconvenient construction, so it has good application prospect. With the rapiddevelopment of construction, the construction process of construction and demolitionof buildings generated a lot of construction waste, of which30%~40%of wasteconcrete, in order to make wider use of the recycled concrete, the paper consider itinto the special-shaped steel tube formed recycled concrete filled steel tube column, toimprove the mechanical properties of recycled concrete and develop mechanicaladvantages of steel tube and of recycled concrete, and provides an important way forthe utilization of waste concrete. The special-shaped (T-shaped and L-shaped), themechanical properties of recycled concrete filled steel tube axial compression shortcolumn and the seismic performance under low reversed cyclic loading are studied.Specific for the following three aspects:1. Using finite element software ABAQUS, the mechanical properties ofrecycled concrete filled special-shaped steel tube column are analyzed, the T-shapedand L-shaped recycled concrete filled steel tube column in the interaction of steel tubeand core concrete is studied; Get by the results, analyze the influence of the sectionsize of the specimens, the steel tube wall thickness and replace rate of recycledaggregates of recycled concrete filled steel tubular short column to the axial pressureand the longitudinal deformation curve.2. Through component’s bearing capacity-deformation curve component ultimatebearing capacity, analyzed the influence of the sectional dimensions,the steel tubewall thickness and the replace rate of s recycled aggregates on the ultimate bearingcapacity; After the research on the stress components and the distortion of the pattern,it is concluded that the most prone to failure.3. Using the finite element software ABAQUS to study the influence degree ofthe seismic performance of concrete-filled steel tube column section size, the steeltube wall thickness and the replace rate of s recycled aggregates to the ultimatebearing capacity and seismic performance, and to explore the influence of factor levelchanges on the index. 4Through the analysis it is concluded that,in the same Other conditions, recycledconcrete components and the corresponding ordinary concrete componentsmechanical properties and deformation properties of similar;Compared with ordinaryconcrete member, recycled concrete component has better ability of deformation. |
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