【摘要】 运用统一强度理论,考虑中间主应力及钢管对混凝土的约束作用,在研究轴心受压承载能力的基础上,引入偏心率和长细比对柱承载力的影响,同时用厚边比影响的等效约束折减系数和混凝土强度折减系数对承载力进行折减,在厚壁圆筒统一强度理论解的基础上得出了方钢管-钢骨混凝土柱偏压极限承载力的计算公式。与有关文献试验结果进行了比较,吻合较好,验证了公式的正确性及可行性。结果表明:该公式有较强的适用性,为方钢管-钢骨混凝土柱偏压承载力分析提供了一定的理论依据,对理论研究和工程设计有一定的参考。更多还原

【Abstract】 The eccentric ultimate load calculation formula of square steel tube filled with steel-reinforced concrete columns was derived by the following steps: using the unified strength theory,taking account of the restriction of intermediate principal stress and the steel tube on the concrete,based on the axial compression load and the effect of the eccentricity ratio and slenderness ratio on the bearing capacity was considered,introducing the reduction factor of concrete strength and the equivalent restriction reduction factor,equalizing the confinement of square steel tube towards concrete to that of circular steel tube towards it and based on unified strength theory solutions of thick tube.Whose results were compared and agreed well.With those of the tests by relevant literatures data,which verified the correctness and feasibility of the formula.更多还原