Experimental Study On The Behavior Of Partially Encased Composite Short Columns Made With Welded H-section Steel Under Eccentrically Load

H steel partially encased concrete composite(PEC)column is a configuration consisting of welded H-shaped steel section with concrete cast between the flanges. Concrete cast betweenthe flanges can effectively improve the resistance to local buckling. Transverse links between the flanges at the regular intervals tend to provide some confinement to the concrete, thereby to improve the ductility of these columns. In this paper, H steel partially encased concrete composite columns are denominated for PEC columns.In this paper, An experimental result of H steel partially encased concrete composite short columns subjected to bias compression is presented. The experimental program includes 6 composite columns that are designed taking steel ratio,width-to-thickness ratio of the flange and high-thick ratio as the factors. Failure models,failure behavior and bearing capacity of the PECshort columns are explored.The main factors influencing ultimate load capacity of the PEC column are steel ratio and width-to-thickness ratio of the flange. It could be concluded that the bearing capacity of partially encased concrete composite short column for eccentrically load improves with increasing of the steel ratio. But the bearing capacity increases as width-to-thickness ratio ofthe flange decreases. The last,based on the test results,a numerical model for predicting the ultimate load capacity of the PEC column under eccentrically load compression is developed. The calculated results are in good agreement with the test data.