Steel built-up batten columns are common\ntypes of columns in Iran and some other parts of the world.\nThey are economic and have acceptable performance due\nto gravity loads. Although several researches have been\nconducted on the behavior of the batten columns under\naxial loads, there are few available articles about their\nseismic performance. Experience of the past earthquakes,\nparticularly the 2003 Bam earthquake in Iran, revealed that\nthese structural members are seismically vulnerable. Thus,\ninvestigation on seismic performance of steel batten columns\ndue to seismic loads and providing a method for\nretrofitting them are important task in seismic-prone areas.\nThis study aims to investigate the behavior of concretefilled\nbatten columns due to combined axial and lateral\nloads. To this end, nonlinear static analyses were performed\nusing ANSYS software. Herein, the behaviors of\nthe steel batten columns with and without concrete core\nwere compared. The results of this study showed that\nconcrete-filled steel batten columns, particularly those filled\nwith high-strength concrete, may cause significant\nincreases in energy absorption and capacity of the columns.\nFurthermore, concrete core may improve post-buckling\nbehavior of steel batten columns.
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