带加强筋的双钢管高强混凝土柱轴压性能研究

Study on Axial Compression Performance of Double Steel Tube High Strength Concrete Column with Reinforcing Bars

将普通螺纹钢置于内外钢管间的空隙制成带加强筋的双钢管高强混凝土柱,借助数值模拟研究该柱与普通双钢管混凝土柱在轴向荷载下的受力差异,以及加强筋平面角度、竖向间距和强度等级等参数对其轴向荷载下力学性能的影响。结果发现:带加强筋的双钢管混凝土柱前期力学性能略高于普通双钢管混凝土柱,后期延性显著高于普通双钢管混凝土柱;不同参数对其轴压性能的影响程度不同,加强筋平面角度显著,竖向间距次之,加强筋强度影响极小。

In this paper,the common rebar was placed in the gap between the inner and outer steel tubes to make a double steel tube high-strength concrete column with reinforced bars.By means of numerical simulation,the force difference between the column and the common double steel tube column under axial load was studied,and the effects of the parameters such as the plane angle of the reinforcing bars,the vertical spacing and the strength grade on the mechanical properties under axial load were studied.It is found that the mechanical properties of double-steel tube concrete columns with stiffeners are slightly higher than those of conventional double-steel tube concrete columns in the early stage,and the ductility in the later stage is significantly higher than that of ordinary columns.Different parameters have different degrees of influence on its axial compression performance,the plane angle of the stiffener is significant,the vertical spacing is second,and the stiffener strength grade has almost no effect.