Estimating fundamental frequency of masonry arches under elevated temperature: numerical analysis and validation using ambient vibration tests

IF 4.4 3区工程技术 Q1 ENGINEERING, CIVIL

Archives of Civil and Mechanical Engineering Pub Date : 2024-11-10 DOI:10.1007/s43452-024-01085-3

Ahmet Can Altunişik, Muhammed Mustafa Öztürk, Ali Fuat Genç, Ali Kaya, Yunus Emrahan Akbulut, Fezayil Sunca, Murat Günaydin

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Abstract

In this study, the changing of dynamic characteristics of masonry arches at varying geometric parameters and temperature histories was investigated through a combination of experimental and numerical methods. First, the dynamic characteristics of laboratory-built arch models were determined both pre- and post-high-temperature test using ambient vibration testing. Then, the finite element (FE) models of the arches were developed for both, allowing for dynamic characteristics to be assessed numerically. To refine the accuracy of numerical models, FE analyses were adjusted based on experimental data. These updated FE models were used to investigate the dynamic characteristics of arches with different spans, heights, widths, and thicknesses under different temperature history scenarios. Finally, utilizing the data repository obtained, formulation and graphs/charts, providing valuable insights into the dynamic response of masonry arches under fire conditions, were developed and presented for practical application. The experimental study revealed that the natural frequencies of arches decreased by 55% with increasing temperature exposure.

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估算高温下砌体拱的基频：数值分析和环境振动试验验证

本研究通过实验和数值方法相结合的方式，研究了砌体拱在不同几何参数和温度历史条件下的动态特性变化。首先，利用环境振动测试确定了实验室建造的拱门模型在高温测试前后的动态特性。然后，为这两种拱形模型开发了有限元 (FE) 模型，以便对动态特性进行数值评估。为了提高数值模型的准确性，根据实验数据对 FE 分析进行了调整。这些更新的有限元模型用于研究不同跨度、高度、宽度和厚度的拱门在不同温度历史情况下的动态特性。最后，利用所获得的数据储存库，开发并展示了公式和图表，为了解砌体拱在火灾条件下的动态响应提供了宝贵的见解，以供实际应用。实验研究表明，随着温度的升高，拱的自然频率降低了 55%。

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来源期刊

Archives of Civil and Mechanical Engineering 工程技术-材料科学：综合

CiteScore

6.80

自引率

9.10%

发文量

201

审稿时长

4 months

期刊介绍： Archives of Civil and Mechanical Engineering (ACME) publishes both theoretical and experimental original research articles which explore or exploit new ideas and techniques in three main areas: structural engineering, mechanics of materials and materials science. The aim of the journal is to advance science related to structural engineering focusing on structures, machines and mechanical systems. The journal also promotes advancement in the area of mechanics of materials, by publishing most recent findings in elasticity, plasticity, rheology, fatigue and fracture mechanics. The third area the journal is concentrating on is materials science, with emphasis on metals, composites, etc., their structures and properties as well as methods of evaluation. In addition to research papers, the Editorial Board welcomes state-of-the-art reviews on specialized topics. All such articles have to be sent to the Editor-in-Chief before submission for pre-submission review process. Only articles approved by the Editor-in-Chief in pre-submission process can be submitted to the journal for further processing. Approval in pre-submission stage doesn''t guarantee acceptance for publication as all papers are subject to a regular referee procedure.