Study on Mechanical Behavior of Integrated Multi-cell Concrete-filled Steel Tubular Stub Columns Under Concentric Compression

Study on the mechanical behavior of L‐shaped concrete‐filled steel tubular columns under axial compression

“…The results show that because of the irregular cross‐sections, conventional L‐shaped and T‐shaped CFSTs without stiffening ribs cannot generate a uniform confining pressure on the core concrete like circular CFSTs 10,16 . In particular, steel tubes with a large depth‐to‐thickness ratio are prone to local buckling under axial compression, thus leading to a further reduction in the restraining effect on the concrete 17,18 . The restraining effect of the steel plate in the middle section of the column on the core concrete is negligible 19 .…”

“…10,16 In particular, steel tubes with a large depth-to-thickness ratio are prone to local buckling under axial compression, thus leading to a further reduction in the restraining effect on the concrete. 17,18 The restraining effect of the steel plate in the middle section of the column on the core concrete is negligible. 19 Therefore, enhancement of the restraining effect of the steel tube on the core concrete is key to improving the performance of L-shaped CFSTs, and a number of stiffening measures have been proposed.…”

Experimental Investigation of Special-Shaped Concrete-Filled Square Steel Tube Composite Columns with Steel Hoops under Axial Loads

“…A multi-cell CFST composite column is a structural form of several rectangular steel tubes combined by welding seams. Its cross-sectional shapes include I, L, and T. Song [10], Sui [11], Cui [12], and Sun [13] completed a series of tests to study mechanical performance under compression and seismic behavior under low cyclic loading of multi-cell CFST composite columns. The multi-cell CFST composite column enhances the restraining effects of steel on concrete and accentuates the combined performance of both materials.…”