核心型钢-混凝土组合柱的竖向承载力学性能研究

Research on vertical bearing mechanical properties of CSRC combination column

为探究不同含钢率对核心型钢-混凝土组合柱竖向承载力学性能的影响,本文以核心型钢-混凝土组合柱为研究对象,基于有限元分析软件ABAQUS建立核心型钢-混凝土组合柱的实体有限元模型,以研究不同含钢率对其破坏模式与极限承载力的影响规律。结果表明:1)含钢率对型钢-混凝土组合柱的破坏模式存在显著影响,随着含钢率的增加,破坏区域逐渐沿组合柱中部发展,破坏区域也随之增大;2)含钢率对型钢-混凝土组合柱的力-位移曲线有显著影响,含钢率越大,组合柱承载力增大越显著,其力-位移曲线主要分为弹性段、屈服阶段、下降段、稳定段4个阶段。本文研究成果对核心型钢-混凝土组合构件的设计计算及其相关规范的制定具有一定的指导意义。

In order to investigate the influence of different steel content rates on the vertical bearing mechanical properties of CSRC combination column, in this article, CSRC combination column is taken as the research object, the solid finite element model of CSRC combination column is established based on the finite element analysis software ABAQUS to study the influence rule of different steel content rates on their damage modes and ultimate bearing capacity.The results show that: 1)the steel content rate has a significant influence on the damage mode of the CSRC combination column, with the increase of steel content rate, the damage area gradually develops along the middle of the composition column, and the damage area also increases;2)the steel content rate has a significant influence on the force-displacement curve of the CSRC combination column, the larger the steel content rate, the more significant the increase of the composition column bearing capacity, and the force-displacement curve is mainly divided into elastic section, yielding section, falling section and stabilizing section.The research results have certain guiding significance for the design calculation of CSRC combination column and the formulation of related specifications.