模块化装配式钢框架组合柱及其抗侧与抗震滞回性能

MODULAR PREFABRICATED STEEL FRAME COMBINATION COLUMN AND ITS LATERAL AND SEISMIC HYSTERETIC PERFORMANCE

模块化装配式钢框架形成模块柱-柱分离的框架结构柱,其竖向承重和水平抗侧不能很好地发挥模块柱共同工作的作用。因此,此类模块化装配式框架结构不能用于中高层建筑,是需要重点研究和发展的方面。该文针对角柱承重式模块化结构中的多柱组合形式,采用外包钢板将相邻模块柱联系起来,即通过外包钢板将模块柱形成组合柱。提出了外包钢板柱-柱组合的连接构造形式并进行了受力机理分析,建立了组合柱的精细化有限元模型,对其进行单向位移、循环往复加载模拟。结果表明:组合柱的水平抗侧刚度、承载力明显提升;提出的将外包钢板开孔后的组合柱改善了组合柱的抗震性能;外包钢板组合柱的滞回曲线更饱满、能量耗散系数更大,承载能力和耗能能力都得到了较好的提升,具有良好的抗震性能,是一种值得推广应用的构造方式。

The modular fabricated steel frame forms a frame-structure column with modular column-column separation, and its vertical bearing capacity and lateral resistance cannot fully play the role of the modular columns working together. Therefore, such modular prefabricated frame structure are unable to be used in the medium-and high-rise buildings, and it is an aspect that needs to be researched and developed. Aiming at the multi-column combination form in the corner column load-bearing modular structure, this paper uses the outer steel plate method to connect the adjacent module columns, named the combination column. The connection structure form of the column-column combination of outer steel plate is proposed and the mechanics property is analyzed. A refined finite element model of the combination column is established, and the unidirectional displacement and cyclic loading simulation are performed on it. The results show that the horizontal lateral stiffness and bearing capacity of the combination column are significantly improved. Furthermore, the proposed combination column with the outer steel plate opening improves its seismic properties. The outer steel combination column has a fuller hysteresis curve and a higher energy dissipation coefficient, and the carrying capacity and energy consumption capacity have been improved. With the good seismic performance, it is a construction method worthy of popularization and application.