离心钢管混凝土构件弯扭试验研究

建立了离心钢管混凝土结构弯扭性能的试验方法 ,介绍了试验过程及装置 ,通过 11根离心钢管混凝土构件的弯扭试验 ,研究分析了不同弯扭加载路径下 ,影响构件受力及变形的主要因素及构件弯扭破坏的机理 ,构件弯扭联合作用下钢管壁应力试验值与Mises屈服准则吻合良好 ,并在试验研究的基础上 ,得出了该结构形式的弯扭承载力相关方程 ,为工程中弯扭联合作用的设计提供了依据。

EXPERIMENTAL STUDY ON CENTRIFUGAL CONCRETE-FILLED STEEL TUBES UNDER BENDING AND TORSION

To study the performance of centrifugal concrete-filled steel tubes under bending and torsion,a real-size experiment on 11 tub es is done.The relevant operating method including equipment,subjects and proces ses is introduced.On different loading paths,the main factors that effect deform ation and stiffness and mechanism of break are studied.The experimental stress a nalysis shows that values of practical critical stress of the steel tube corresp ond well with Mises Yielding Rule.Finally,a correlate equation of bearing capaci ty of this structure under bending and torsion is deduced,which may provide a ba sis for design of such structures.