Study and design of assembled CFDST column-beam connections considering column wall failure

IF 4 3区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Steel and Composite Structures Pub Date : 2021-01-01 DOI:10.12989/SCS.2021.39.2.201

Lei Guo, Jingfeng Wang, Tony Y. Yang, Wanqian Wang, Binggen Zhan

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引用次数: 0

Abstract

Currently, there is a lack of research in the design approach to avoid column wall failure in the concrete filled double skin steel tubular (CFDST) column-beam connections. In this paper, a finite element model has been developed and verified by available experimental data to analyze the failure mechanism of CFDST column-beam connections. Various finite element models with different column hollow ratios () were established. The simulation result revealed that with increasing  the failure mode gradually changed from yielding of end plate, to local failure of the column wall. Detailed parametric analyses were performed to study the failure mechanism of column wall for the CFDST column-beam connection, in which the strength of sandwiched concrete and steel tube and thickness of steel tube were incorporated. An analytical model was proposed to predict the moment resistance of the assembled connection considering the failure of column wall. The simulation results indicate that the proposed analytical model can provided a conservative prediction of the moment resistance. Finally, an upper bound value of was recommend to avoid column wall failure for CFDST column-beam connections.

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考虑柱墙破坏的组合式CFDST柱-梁连接的研究与设计

目前，对于双层钢管混凝土柱-梁连接中避免柱墙破坏的设计方法研究较少。本文建立了分析CFDST柱-梁连接破坏机理的有限元模型，并通过试验数据进行了验证。建立了不同柱空心比()的有限元模型。仿真结果表明，随着的增加，柱壁破坏模式逐渐由端板屈服转变为局部破坏。对CFDST柱-梁节点柱壁破坏机理进行了详细的参数分析，其中考虑了夹芯混凝土与钢管的强度和钢管的厚度。提出了考虑柱壁破坏的组合节点弯矩抗力的解析模型。仿真结果表明，所提出的分析模型能较好地预测弯矩阻力。最后，为避免CFDST柱-梁连接的柱墙破坏，推荐了一个上限值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Steel and Composite Structures 工程技术-材料科学：复合

CiteScore

8.50

自引率

19.60%

发文量

审稿时长

7.5 months

期刊介绍： Steel & Composite Structures, An International Journal, provides and excellent publication channel which reports the up-to-date research developments in the steel structures and steel-concrete composite structures, and FRP plated structures from the international steel community. The research results reported in this journal address all the aspects of theoretical and experimental research, including Buckling/Stability, Fatigue/Fracture, Fire Performance, Connections, Frames/Bridges, Plates/Shells, Composite Structural Components, Hybrid Structures, Fabrication/Maintenance, Design Codes, Dynamics/Vibrations, Nonferrous Metal Structures, Non-metalic plates, Analytical Methods. The Journal specially wishes to bridge the gap between the theoretical developments and practical applications for the benefits of both academic researchers and practicing engineers. In this light, contributions from the practicing engineers are especially welcome.