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为保证防屈曲支撑工作性能的稳定性,提出一种新型外围约束机制。通过有限元分析,同时考虑初始缺陷的影响和接触非线性,对防屈曲支撑进行数值模拟,分析其在两种不同形式的加劲布置方式下支撑的力学性能。分析表明,不同的屈曲约束形式对核心构件侧向变形的约束效果不同,从而影响轴向位移的加载幅值和支撑的承载力。基于上述分析,给出防屈曲支撑的外围约束单元的设计建议。
In order to ensure the stability of anti-buckling support work performance, a new type of peripheral constraint mechanism is proposed. Through the finite element analysis, considering the influence of the initial defect and the contact nonlinearity, the buckling brace is numerically simulated and its mechanical properties are analyzed under two different types of stiffened arrangement. The analysis shows that the restraint effect of different buckling restraints on the deformation of core members is different, which affects the loading amplitude of axial displacement and the bearing capacity of support. Based on the above analysis, the design suggestions of the peripheral restraining elements of buckling brace are given.