Experimental squash load of concrete-filled thin welded cold formed steel stubs with different welding fillets location

الملخص EN

In the present work, results of tests conducted on thin welded rectangular steel-concrete stubs are presented.

The stub section was made from two U shaped cold formed steel plates welded to form box whose dimensions were : 100 x 70 x 2mm.

The main parameters studied were : stub height (50-500mm), effect of the concrete infill and the weld fillet location.

The tests were carried out 28 days after the date of casting the concrete infill under axial compression up to failure.

A total of 28 stubs were tested, 14 were empty and 14 filled with concrete made with crushed crystallized slag aggregate.

The object of the study was to investigate the failure load of composite sections and the use of crushed slag instead of conventional aggregate.

From test results it was confirmed that the length of stubs had a drastic effect on the failure load and resulted from local buckling.

It appeared that the location of weld fillets had only a slight effect on the failure load for empty steel stubs and was insignificant for composite stubs.