非対称鉄骨を内蔵したSRC柱部材の耐力評価法

抄録

Exterior columns of Steel-Reinforced Concrete (SRC) structures are often composed of non-symmetric steel sections (e.g., tee section) embedded in concrete. However, due to the non-symmetricity, the full plastic moments in the weak-axis bending are not explicitly available for such SRC columns. The current design code (i.e., the AIJ standard for structural calculation of SRC structures) has a provision for weak-axis calculations but, in some cases, may lead to significant underestimation of member strength due to its poor approximation. This paper proposes new approximate design formulas with good accuracy for the weak-axis bending and bi-axial bending full plastic moments for non-symmetric SRC columns. The proposed design formula shows great agreements with high-fidelity numerical solutions.