型钢混凝土柱在单调荷载作用下的受扭性能试验研究

Experiment study on torsional behavior of steel reinforced concrete columns under unilateral loads

试验共采用3个试件,通过它们在复合受力下的单调受扭试验,得到了型钢混凝土柱在单调荷载下的裂缝形成和发展规律及破坏特征。试验主要通过控制轴压比、扭弯比来分析型钢混凝土构件在压弯剪扭作用下的受扭性能。结果表明,轴压比的增加提高了试件的初始刚度和承载力,扭弯比的增加显著提高了试件初始刚度。

Three specimens were used to conduct the torsion experiment of unilateral loads under the combined force, then the crack formation, development rule and the failure characteristic of steel reinforced concrete columns were obtained. Through the control of axial compression ratio and crankle ratio, the torsional behavior of steel reinforced concrete columns under combined loads was analyzed. The results show that the increase of the axial compression ratio has greatly increased the bearing capacity and initial stiffness of specimens, and the increase of ratio of torque to bending moment has improved the initial stiffness of specimens.