Multi-Hazard performance evaluation of the innovative Angular Cylindrical RBS connections using numerical modeling

IF 4 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Journal of Constructional Steel Research Pub Date : 2024-10-01 DOI:10.1016/j.jcsr.2024.109053

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引用次数: 0

Abstract

The connection ductility is crucial for reducing brittle failure in multi-hazard scenarios. This study develops connections, namely angular cylindrical RBS connections, to meet the ductility demand created by a beam subjected to a thermal load or earthquake. Three sections were considered in this research: first, sequentially coupled nonlinear thermal-stress analysis was conducted by using the FE software ABAQUS to examine fire performance. Secondly, the most efficient connections with superior thermal performance were analyzed separately under seismic loads and progressive failure situations. The results were extracted and compared in terms of failure modes, distribution of plastic hinges, axial force diagrams, and hysteresis curves. Based on the results, when the angle assembly is accurately designed, the catenary mechanism is fully developed under fire or the removal of the column in a progressive failure disaster. Furthermore, the angular cylindrical RBS connection reached a total story drift angle of 0.03 rad without lateral-torsional buckling, which exceeds the AISC/FEMA requirements for intermediate moment frames.

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利用数值建模对创新的角圆柱形 RBS 连接进行多重危险性能评估

连接的延展性对于减少多种灾害情况下的脆性破坏至关重要。本研究开发了连接件，即角圆柱形 RBS 连接件，以满足梁在热荷载或地震作用下产生的延性要求。本研究考虑了三个部分：首先，使用 FE 软件 ABAQUS 进行顺序耦合非线性热应力分析，以检查防火性能。其次，在地震荷载和渐进失效情况下分别分析了热性能优越的最高效连接。分析结果包括失效模式、塑性铰链分布、轴向力图和滞后曲线。结果表明，当精确设计角组件时，在火灾或渐进式失效灾难中拆除支柱的情况下，导柱机构会得到充分发展。此外，角形圆柱 RBS 连接在无侧扭屈曲的情况下达到了 0.03 rad 的总层高漂移角，超过了 AISC/FEMA 对中间弯矩框架的要求。

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

Journal of Constructional Steel Research 工程技术-工程：土木

CiteScore

7.90

自引率

19.50%

发文量

550

审稿时长

46 days

期刊介绍： The Journal of Constructional Steel Research provides an international forum for the presentation and discussion of the latest developments in structural steel research and their applications. It is aimed not only at researchers but also at those likely to be most affected by research results, i.e. designers and fabricators. Original papers of a high standard dealing with all aspects of steel research including theoretical and experimental research on elements, assemblages, connection and material properties are considered for publication.