钢骨-方钢管自密实高强混凝土轴压长柱试验研究  

Experimental study of centrally loaded square steel tubular slender columns filled with steel-reinforced self-consolidating high-strength concrete

作　　者：朱美春[1] 王清湘[1] 刘士润 朱耀国[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室

出　　处：《大连理工大学学报》2006年第6期875-879,共5页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50078008)

摘　　要：钢骨-方钢管自密实高强混凝土柱是一种重载柱设计的新模式．为了研究该组合柱的轴压稳定性能，以长细比（A）为主要参数，进行了8根组合长柱的轴心受压试验．试验结果表明：由于内填混凝土和钢骨的存在，组合柱试件具有良好的稳定性能；在研究的长细比范围内（λ=11～43），所有试件都具有较高的承载力和一定的延性，但是其承载能力和延性随长细比的增大明显降低．最后给出了钢骨-方钢管自密实高强混凝土柱的轴压承载力计算公式，公式计算值与试验值吻合良好．A square steel tubular column filled with steel-reinforced self-consolidating high-strength concrete is a new design model of steel-concrete composite columns. The objective of this study is to investigate the stability behavior of this new type of composite columns subjected to axial compressive load. For this purpose, eight specimens with different slenderness ratio （λ ranged from 11 to 43） are tested under axial compression. The experimental results indicate that due to the existence of encased concrete and steel section, the composite long columns show good stability behavior. All the specimens have fairly good bearing-capacity and ductility, but the maximum axial load and its corresponding strain of specimens obviously decrease with the increase of λ. Finally formulas for estimating the axial stability capacity of the composite columns are proposed. The calculation results agree well with the test results.

关 键 词：组合柱 方钢管 长细比 高强混凝土 自密实混凝土 

分 类 号：TU398[建筑科学—结构工程]