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On-line Access: 2024-03-13

Received: 2023-03-18

Revision Accepted: 2023-06-23

Crosschecked: 2024-03-13

Cited: 0

Clicked: 487

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Yan-bin SHEN

https://orcid.org/0000-0002-2148-9138

Wucheng XU

https://orcid.org/0000-0002-3816-9421

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Journal of Zhejiang University SCIENCE A 2024 Vol.25 No.3 P.223-237

http://doi.org/10.1631/jzus.A2300143


Non-uniform thermal behavior of single-layer spherical reticulated shell structures considering time-variant environmental factors: analysis and design


Author(s):  Wucheng XU, Xiaoqing ZHENG, Xuanhe ZHANG, Zhejie LAI, Yanbin SHEN

Affiliation(s):  College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   ybshen@zju.edu.cn

Key Words:  Non-uniform temperature field, Non-uniform thermal load, Non-uniform thermal effect, Single-layer spherical reticulated shell, Time-variant environmental factor


Wucheng XU, Xiaoqing ZHENG, Xuanhe ZHANG, Zhejie LAI, Yanbin SHEN. Non-uniform thermal behavior of single-layer spherical reticulated shell structures considering time-variant environmental factors: analysis and design[J]. Journal of Zhejiang University Science A, 2024, 25(3): 223-237.

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author="Wucheng XU, Xiaoqing ZHENG, Xuanhe ZHANG, Zhejie LAI, Yanbin SHEN",
journal="Journal of Zhejiang University Science A",
volume="25",
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pages="223-237",
year="2024",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300143"
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%T Non-uniform thermal behavior of single-layer spherical reticulated shell structures considering time-variant environmental factors: analysis and design
%A Wucheng XU
%A Xiaoqing ZHENG
%A Xuanhe ZHANG
%A Zhejie LAI
%A Yanbin SHEN
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2300143

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T1 - Non-uniform thermal behavior of single-layer spherical reticulated shell structures considering time-variant environmental factors: analysis and design
A1 - Wucheng XU
A1 - Xiaoqing ZHENG
A1 - Xuanhe ZHANG
A1 - Zhejie LAI
A1 - Yanbin SHEN
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2300143


Abstract: 
Contrary to conventional design methods that assume uniform and slow temperature changes tied to atmospheric conditions, single-layer spherical reticulated shells undergo significant non-uniform and time-variant temperature variations due to dynamic environmental coupling. These differences can affect structural performance and pose safety risks. Here, a systematic numerical method was developed and applied to simulate long-term temperature variations in such a structure under real environmental conditions, revealing its non-uniform distribution characteristics and time-variant regularity. A simplified design method for non-uniform thermal loads, accounting for time-variant environmental factors, was theoretically derived and validated through experiments and simulations. The maximum deviation and mean error rate between calculated and tested results were 6.1 °C and 3.7%, respectively. Calculated temperature fields aligned with simulated ones, with deviations under 6.0 °C. Using the design method, non-uniform thermal effects of the structure are analyzed. Maximum member stress and nodal displacement under non-uniform thermal loads reached 119.3 MPa and 19.7 mm, representing increases of 167.5% and 169.9%, respectively, compared to uniform thermal loads. The impacts of healing construction time on non-uniform thermal effects were evaluated, resulting in construction recommendations. The methodologies and conclusions presented here can serve as valuable references for the thermal design, construction, and control of single-layer spherical reticulated shells or similar structures.

考虑时变环境因素的单层球面网壳结构的非均匀热行为:分析与设计

作者:许武成1,3,4,郑晓清2,张轩赫1,3,4,来哲杰1,沈雁彬1,3,4
机构:1浙江大学,建筑工程学院,中国杭州,310058;2浙江大学,平衡建筑研究中心,中国杭州,310028;3浙江大学,长三角智慧绿洲创新中心,中国嘉兴,314100;4浙江大学,浙江省空间结构重点实验室,中国杭州,310058
目的:由于多环境因素的动态耦合作用,单层球面网壳的温度变化具有强时变性和显著的非均匀特征。然而,传统的设计观念将结构的温度变化等效为气温的均匀升降,这可能导致潜在的安全隐患。通过数值模拟、实验研究和理论推导,本文旨在分析单层球面网壳温度的时变规律和分布模式,研究非均匀热效应及其影响因素,并针对该类结构提供非均匀热荷载的设计方法。
创新点:1. 根据真实热边界条件,模拟单层球面网壳的长期温度变化并剖析其时变规律和分布模式;2. 基于理论推导、数值和实验验证,提出单层球面网壳非均匀热荷载的设计方法;3. 对比结构均匀与非均匀热效应,分析影响热效应的施工因素。
方法:1. 通过仿真计算,运用真实热边界条件模拟单层球面网壳的长期温度变化,分析温度场的时变规律与分布模式;2. 通过理论推导,构建单层球面网壳非均匀热荷载的设计方法,并通过现场试验和数值模拟验证方法的有效性;3. 通过应用热荷载设计方法,研究结构的热效应及其影响因素。
结论:1. 单层球面网壳温度场具有强时变性和非均匀性特征,不均匀程度取决于热边界条件,分布模式取决于太阳与结构之间的位置关系;2. 运用理论推导完成温度场的简化计算,实现非均匀热荷载的设计,并通过实验和模拟对方法的有效性进行验证;3. 单层球面网壳的非均匀热效应显著强于均匀热效应,施工合拢时间是决定结构热效应的关键因素,合理安排合拢时间可以有效降低结构的热应力和变形。

关键词:非均匀温度场;非均匀热荷载;非均匀热效应;单层球面网壳;时变环境因素

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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