JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A

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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

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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,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2300143

@article{title="Non-uniform thermal behavior of single-layer spherical reticulated shell structures considering time-variant environmental factors: analysis and design",
author="Wucheng XU, Xiaoqing ZHENG, Xuanhe ZHANG, Zhejie LAI, Yanbin SHEN",
journal="Journal of Zhejiang University Science A",
year="in press",
publisher="Zhejiang University Press & Springer",
doi="https://doi.org/10.1631/jzus.A2300143"
}

%0 Journal Article
%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
%P 223-237
%@ 1673-565X
%D in press
%I Zhejiang University Press & Springer
doi="https://doi.org/10.1631/jzus.A2300143"

TY - JOUR
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
SP - 223
EP - 237
%@ 1673-565X
Y1 - in press
PB - Zhejiang University Press & Springer
ER -
doi="https://doi.org/10.1631/jzus.A2300143"

Abstract
Chinese Summary
Academic Network
Reviewer Comment

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。

关键词组：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

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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

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