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Performance of sand slag concrete hollow thin wall welded pipe

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Document pages: 8 pages

Abstract: This paper introduces the axial bearing capacity of welded rectangular steel short columns filled with concrete sand. Through a series of tests, the mechanical behavior of composite short columns under axial compression load is studied; The cross section size is 100 × seventy × 2   well. A total of 20 short columns were tested as follows: 4 hollow thin welded pipes were subjected to axial and eccentric load compression tests, 4 were filled with ordinary concrete specified by Bo column, 6 were filled with concrete with crystalline sand slag specified by BSI instead of natural sand, 6 of which were stuffed into the concrete, and the natural sand part of the concrete was replaced by a crystalline sand slag called bsii. The main parameters of the study are the sample height (300 mm)   mm – 500 mm   UM), eccentricityty of load and type of filling concrete. Based on test results obtained, it is confirmed that the length of the tubes has a considerable effect on the bearing capacity and the failure mode. In all test tubes, fracture occurred by the convex local buckling of steel section due to the outward thrust of the concrete; it was observed that the sand concrete improves the bearing capacity of tubes compounds compared to those filled with ordinary concrete.

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