太阳辐射下大跨度不锈钢屋顶系统的非均匀温度效应研究

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

Journal of Constructional Steel Research Pub Date : 2024-11-06 DOI:10.1016/j.jcsr.2024.109133

Mingming Wang , Danni Liu , Yichen Lu , Qiang Yang , Danqing Song , Xiaoli Liu

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引用次数: 0

摘要

金属屋顶系统已广泛应用于各种地标性建筑。大跨度金属屋面系统在太阳辐射下的温度影响非常显著。作为最新的屋顶形式，连续焊接不锈钢屋顶（CWSSR）系统在温度作用下表现出许多未知行为。本研究的目的是分析 CWSSR 系统在太阳辐射下的温度场和温度效应，并选择合适的支撑布局来降低 CWSSR 系统的温度效应。首先，对 CWSSR 系统的温度场进行了实验研究。然后对温度场分布进行了有限元分析，并通过对比实验结果验证了有限元方法的有效性。最后，研究了不同支撑布局对 CWSSR 系统温度效应的影响。结果表明，在太阳辐射下，CWSSR 系统的温度场和温度效应存在明显的不均匀分布。屋面板与环境温度的最大温差为 39.4 °C。通过交叉支撑和分段支撑的布置，可有效降低屋面板和支撑的应力，最大降低幅度分别为 14.4 % 和 38.9 %。调查结果对金属屋顶系统的安全设计贡献最大，有望为 CWSSR 系统的未来应用提供指导。

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Investigation into the nonuniform temperature effect of a large-span stainless steel roof system under solar radiation

Metal roof systems have been widely used in various landmark buildings. The effect of the temperature of a large-span metal roof system under solar radiation is significant. As the latest roof form, the continuous welded stainless steel roof (CWSSR) system shows many unknown behaviors under the action of temperature. The purpose of this work is to analyse the temperature field and temperature effect of the CWSSR system under solar radiation and to select the appropriate support layouts to reduce the temperature effect of the CWSSR system. First, an experimental study on the temperature field of the CWSSR system was carried out. Finite element analysis of the temperature field distribution was then performed, and the validity of the finite element method was verified by comparing the experimental results. Finally, the influence of different support layouts on the temperature effect of the CWSSR system was researched. The results show that there is an obvious nonuniform distribution of the temperature field and temperature effect of the CWSSR system under solar radiation. The maximum temperature difference between the roof panel and the ambient temperature is 39.4 °C. By using arrangements of cross-support and segmented support, the stresses of the roof panel and support can be effectively reduced, and the maximum reductions are 14.4 % and 38.9 %, respectively. The investigation results contribute the most to the safe design of metal roof systems and are expected to provide guidelines for future applications of the CWSSR system.

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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.