西南科技大学学报
西南科技大學學報
서남과기대학학보
JOURNAL OF SOUTHWEST CHINA INSTITUTE OF TECHNOLOGY
2011年
3期
9-13
,共5页
高强混凝土%钢管%承载能力%延性
高彊混凝土%鋼管%承載能力%延性
고강혼응토%강관%승재능력%연성
High strength concrete%Steel tube%Load bearing capacity%Ductility
对复式钢管高强混凝土轴压短柱的力学性能进行了研究，结果证明：混凝土强度越高，荷载一纵向应变曲线线性段比例越大，横向应变越小。钢管约束后，试件的延性得以显著改善，外钢管软化后，内钢管仍起套箍约束增强作用，耐火性良好，获得了复式钢管高强混凝土承载能力计算公式，计算值和实测值吻合良好。
對複式鋼管高彊混凝土軸壓短柱的力學性能進行瞭研究，結果證明：混凝土彊度越高，荷載一縱嚮應變麯線線性段比例越大，橫嚮應變越小。鋼管約束後，試件的延性得以顯著改善，外鋼管軟化後，內鋼管仍起套箍約束增彊作用，耐火性良好，穫得瞭複式鋼管高彊混凝土承載能力計算公式，計算值和實測值吻閤良好。
대복식강관고강혼응토축압단주적역학성능진행료연구，결과증명：혼응토강도월고，하재일종향응변곡선선성단비례월대，횡향응변월소。강관약속후，시건적연성득이현저개선，외강관연화후，내강관잉기투고약속증강작용，내화성량호，획득료복식강관고강혼응토승재능력계산공식，계산치화실측치문합량호。
An experiment was undertaken to study ＇the mechanical properties of duplex steel tubular high strength concrete short columns. Test results show that the higher concrete strength is, the higher linear part of load-longitudinal strain and the lower transverse strain is. The ductility of specimens are improved significantly due to the steel tube confinement. After softening of outer steel tube caused by fire, the inner steel tube still works well. Thus this kind of structure has better fireproofing performance. The formula for calculating the load bearing capacity of duplex steel tubular high strength concrete short columns is obtained.
