提高混合火灾试验的稳定性:分析方法和软件实施的进步

IF 4.4 2区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
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引用次数: 0

摘要

在大规模结构耐火试验中,与单个构件耐火试验相比,单个构件与周围结构之间的相互作用会导致行为差异。由于资金和时间的限制,对真实结构进行大规模测试具有挑战性。为了弥补这一差距,出现了 "混合防火测试(HFT)"的概念,即对结构系统的一部分(即物理子结构)进行实验测试,同时对其余结构(即数值子结构)进行数值分析。HFT 面临的主要挑战包括:在测试过程中考虑火灾暴露构件的不同刚度,确保整个分析过程的稳定性;在物理子结构 (PS) 和数值子结构 (NS) 组件之间建立多功能通信平台。本文介绍了一个全面的 HFT 框架,该框架在用户友好的软件界面中实施,可同时促进虚拟和实验测试。该软件采用了一种新方法,通过预测 PS 在测试过程中的刚度来解决稳定性问题,并在有限的迭代次数内实现收敛。此外,该框架还包括一个利用互联网协议(IP)和 COM 端口的通信平台,可快速、方便地连接各种实验控制系统和有限元软件包。通过在模拟环境中对 3 层钢结构进行的高频加速试验中的成功应用,验证了所开发软件的功能。力控制和位移控制方法都证实了该方法对所采用测试程序的适应性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improving stability in hybrid fire testing: Advancements in analysis method and software implementation

In large-scale structural fire resistance tests, the interaction between the individual elements and the surrounding structure causes discrepancies in behaviour compared to single-element fire tests. Large-scale tests of real structures are challenging due to financial and time limitations. To bridge this gap, the concept of “Hybrid Fire Testing (HFT)” emerges, where a portion of the structural system (i.e., physical substructure) is experimentally tested while the remaining structure (i.e., numerical substructure) is analyzed numerically. The primary challenges in HFT involve ensuring stability throughout the analysis by considering the varying stiffness of the fire-exposed element during the test and establishing a versatile communication platform between the physical substructure (PS) and numerical substructure (NS) components. This paper presents a comprehensive HFT framework, implemented within a user-friendly software interface, facilitating both virtual and experimental testing. The software incorporates a new method addressing stability concerns by predicting PS stiffness during the test, achieving convergence within a limited number of iterations. Additionally, the framework includes a communication platform utilizing internet protocols (IP) and COM ports for rapid and easy connection to diverse experimental control systems and finite element software packages. The functionality of the developed software is validated through its successful application in an HFT conducted on a 3-story steel structure within a simulated environment. Both force-controlled and displacement-controlled approaches confirm the method’s adaptivity to the employed test procedures.

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来源期刊
Computers & Structures
Computers & Structures 工程技术-工程:土木
CiteScore
8.80
自引率
6.40%
发文量
122
审稿时长
33 days
期刊介绍: Computers & Structures publishes advances in the development and use of computational methods for the solution of problems in engineering and the sciences. The range of appropriate contributions is wide, and includes papers on establishing appropriate mathematical models and their numerical solution in all areas of mechanics. The journal also includes articles that present a substantial review of a field in the topics of the journal.
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