Development of Steel and Concrete Composite Columns Objecting for Labor-Saving and Acting Large Structural Performance

通过试验1工作，对钢-混凝土组合柱的结构性能进行了研究。组合柱的截面为混凝土和钢管包裹的外包钢。试验选取了外包钢截面形状、钢管宽厚比和轴压比作为主要试验参数。1)小抗弯强度钢骨组合柱具有较大的轴压比为0.4倍的结构性能。2)大抗弯强度钢骨的组合柱在轴压比为0.6倍的轴压比下表现出稳定的性能。3)薄壁钢管(宽厚比为125)的组合柱表现出较大的抗震性能。4)混凝土的强度由十字形截面和薄壁钢管(宽厚比为125)包裹而成。

Structural performance of steel and concrete composite columns was investigated by carrying out of experimental 1 work. The section of the composite columns is concrete and encased steel covering by steel tube. Shape of cross section of encased steel, width-thickness of steel tube and axial load ratio were selected as the main experimental parameters.From the test results, the following points were made clear;1) The composite columns encased little flexural strength steel shows large structural performance under axial load ratio 0.4 times against the axial compressive strength.2) The composite columns encased large flexural strength steel shows stable behavior under axial load ratio 0.6 times against the axial compressive strength.3) The composite columns covered by a thin steel tube (width-thickness ratio =125) shows large earthquake resistant properties.4) The strength of concrete was made large by an encasing cruciform steel section and covering by a thin steel tube (width-thickness ratio is 125).