Study on the impact of cable nets on the membrane roof failure of air-supported membrane structures under fire conditions

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-04-01 DOI:10.1016/j.tws.2025.113247

Yaning Zhang , Ying Sun , Bo Liu , Tengfei Wang , Yang Yu , Qiming Zhu , Zhenggang Cao

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Abstract

Few studies have investigated the fire safety of air-supported membrane structures with cable nets. Given the multiple physical fields and scales involved, this study proposes a simplified sequential thermal-mechanical analysis method to study the impact of cable nets on membrane roof failure. Three key issues in the simulation are addressed through tests on heat transfer, cable force measurement and fire damage. Specifically, a two-dimensional heat transfer analysis is applied to determine the fine-scale temperature distribution within cable net, based on the temperature field of membrane roof by large eddy simulation. The cable-membrane interaction under high temperature is comprehensively analyzed using co-nodal and friction-slip models. The Tsai-Hill failure criterion is employed to characterize the failure of the stressed membrane roof. Finally, a parametric analysis is carried out on a full-scale structure, considering different cable net types, fire power, fire growth rates, and fire positions. Results show that when the maximum temperature of the membrane roof is below 70 °C, the influence of non-uniform temperature field on structural mechanical properties is minimal. The cable net reduces membrane roof stress under fire conditions, slightly raising the safe temperature limits of the membrane roof. However, the faster temperature rise rate of the membrane roof during fires leads to less contribution of the cable nets in delaying the failure time. The insights could help the development of fire safety standards for air-supported membrane structures.

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火灾条件下索网对气支膜结构膜顶破坏的影响研究

对带索网的气支膜结构的防火安全性研究较少。考虑到所涉及的多个物理场和尺度，本研究提出了一种简化的顺序热-力分析方法来研究索网对膜状屋面破坏的影响。通过传热测试、电缆测力测试和火灾损伤测试，解决了模拟中的三个关键问题。在大涡模拟膜状顶板温度场的基础上，采用二维传热分析方法确定了电缆网内部的精细尺度温度分布。采用节点模型和摩擦滑移模型对高温下索膜相互作用进行了综合分析。采用Tsai-Hill破坏准则对应力膜顶的破坏进行了表征。最后，对全尺寸结构进行了参数化分析，考虑了不同的电缆网类型、火力、火灾增长率和火灾位置。结果表明：当膜屋盖的最高温度低于70℃时，非均匀温度场对结构力学性能的影响最小；索网降低了膜屋盖在火灾条件下的应力，略微提高了膜屋盖的安全温度极限。而膜屋盖火灾时升温速率越快，索网对延迟失效时间的贡献越小。这些见解可以帮助空气支撑膜结构的消防安全标准的制定。

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

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.