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采用双剪统一强度理论对新型构件纤维增强复合材料(FRP)-混凝土-钢双壁空心管短柱的轴压承载力进行研究,通过考虑中间主应力及相应面上正应力的影响,忽略外层FRP套管对短柱轴力的贡献而只考虑套管对混凝土的套箍作用,提出FRP-混凝土-钢双壁空心管短柱的轴压承载力公式,并对影响因素进行分析。经比较,计算结果与相应文献的试验结果及有限元分析结果吻合较好,表明所推公式具有一定的适用性。
The twin-shear unified strength theory is used to study the axial compressive bearing capacity of FRP-concrete-steel double-walled short tubular hollow columns by neglecting the influence of the middle principal stress and the corresponding normal stress on the surface Layer FRP casing contributes to the axial force of the short column, only the casing effect on the concrete hoop is considered, and the formula for the axial bearing capacity of FRP-concrete-steel double-walled hollow tubular short column is proposed and the influencing factors are analyzed. By comparison, the calculated results are in good agreement with the experimental results and the finite element analysis of the corresponding literature, indicating that the proposed formula has some applicability.