To　analyze　size　effect　of　concrete　columns　under　large　eccentric　loading,　two　groups　reinforced　concrete　columns　were　produced,　the　eccentricity　were　0.6h0　and　0.9h0　respectively,　and　the　specimen　were　200　mm×200　mm,　400　mm×400　mm,　800　mm×800　mm　respectively.　The　authers　studied　damage　characteristics,　ultimate　capacity,　sectional　strain　properties,　deformability　and　curvature　of　reinforced　concrete　columns　with　different　size　under　the　same　eccentricity.　The　results　show　that　the　size　has　less　effect　on　damage　characteristics　and　the　sectional　strain　properties　of　columns,　and　the　size　effect　on　ultimate　capacity　and　deformability　is　obvious.　The　storage　for　capacity　safety　and　the　deformability　of　columns　are　decrease　with　the　dimensions　increasing.　©,　2015,　Beijing　University　of　Technology.　All　right　reserved.