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进行了以长细比和偏心率为参数的共22根波形钢板钢管混凝土柱的试验。对试件的荷载-挠度曲线、极限承载力、柱肢钢管和波形钢板的应变等进行了分析。试验结果表明,波形钢板钢管混凝土柱的受力性能与钢管混凝土格构柱相近,随着长细比与偏心率的增大,波形钢板钢管混凝土柱的极限承载力显著降低,而长细比和偏心率对其极限承载力的影响基本上是相互独立的,可采用双系数乘积公式计算。波形钢板钢管混凝土柱应考虑剪切变形对极限承载力及挠曲变形的影响,但由于波形钢板抗剪刚度要大于钢管混凝土格构柱的缀管,因而其剪切变形所引起的附加挠度对极限承载力的降低影响较钢管混凝土格构柱小。在实腹式截面杆件稳定荷载计算的基础上,提出了考虑剪切变形影响的波形钢板钢管混凝土柱稳定系数的计算方法。
A total of 22 corrugated steel tubular concrete columns with slenderness ratio and eccentricity as parameters were tested. The load-deflection curve, ultimate bearing capacity, strain of column-and-column steel pipe and corrugated steel plate were analyzed. The experimental results show that the ultimate bearing capacity of CFST column with corrugated steel is significantly reduced with the increase of slenderness ratio and eccentricity, while the slenderness ratio and The influence of eccentricity on its ultimate bearing capacity is basically independent of each other and can be calculated by the double coefficient product formula. The effect of shear deformation on the ultimate bearing capacity and deflection should be taken into account in the concrete filled steel tubular columns with corrugated steel plates. However, due to the fact that the shear stiffness of the corrugated steel plate is larger than that of the concrete filled steel tubular columns, the additional deflection caused by shear deformation The effect of the decrease of ultimate bearing capacity is smaller than that of steel tube concrete lattice. On the basis of the calculation of the steady load of the web with solid abdominal section, the calculation method of the stability coefficient of the concrete filled steel tubular column with corrugated steel plate considering the influence of shear deformation is proposed.