Experimental study on eccentric compression behavior of multi cavity T-shaped concrete-filled steel tubular columns
In order to study the mechanical behavior of multi cavity T-shaped concrete-filled steel tubular columns under eccentric load,one ordinary T-shaped concrete-filled steel tubular column and five multi cavity T-shaped concrete-filled steel tubular columns were tested under axial or eccentric compression loading with different eccentricities,and the influence of eccentricity and height-width ratio on the compression behavior of multi cavity T-shaped concrete-filled steel tubular columns were mainly investigated.The test results show that compared with T-shaped concrete-filled steel tubular column with similar steel content,using the multi cavity T-shaped section can better exert the confinement of steel tubes to the core concrete,and has higher bearing capacity and better deformation performance.The ultimate bearing capacity of multi cavity T-shaped concrete-filled steel tubular columns decrease with the increase of eccentricity.When the height of the specimen increases from 720mm to 1 800mm,the ultimate bearing capacity of the multi cavity T-shaped concrete-filled steel tubular column shows a decreasing trend,but the specimen does not exhibit any unstable failure characteristics.
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