Research on the Direct Design Method for Semi-Rigid Connected Steel Frame-Braced Structures
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摘要: 为了进一步降低建筑行业碳排放,利用半刚性连接在减少建筑结构材料用量方面的潜力,提出了半刚性连接钢框架-支撑结构体系及其直接设计方法。作为一种介于刚性连接和铰接连接之间的结构形式,半刚性连接允许在梁与柱之间存在一定的弯矩和转角,从而提高结构的整体承载效率。基于现有规范和设计软件,阐述了直接设计方法的步骤及建模方法。基于某实际厂房的数值算例,验证了所提出设计方法的有效性和结构体系的优越性。数值算例结果表明:采用半刚性连接钢框架相比传统刚接钢框架可在同等力学性能下节省超20%的用钢量。Abstract: To further reduce carbon emissions in the construction industry, this paper proposes a semi-rigid connected steel frame-braced structural system and its direct design method to mitigate the use of construction materials. Positioned between fully-rigid and pinned connections, semi-rigid connections allow for certain levels of bending moment and rotation between beams and columns, thereby enhancing the overall structural load-carrying efficiency. The step-by-step procedure and modeling techniques of the direct design method were elaborated based on existing codes and design software. The effectiveness of the proposed design method and the superiority of the structural system were validated through numerical examples based on an actual factory building. The numerical results demonstrated that employing semi-rigidly connected steel frames could save over 20% of steel consumption compared to traditional rigidly connected steel frames while maintaining equivalent structural performance.
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Key words:
- semi-rigid connection /
- steel frame /
- structural design /
- material usage /
- carbon emission /
- nonlinear analysis
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