大跨度双向曲线钢桁架屋盖结构日照非均匀温度场研究-《建筑科学与工程学报》

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Title:: Research on non-uniform solar-induced temperature field in large-span bidirectional curved steel truss roof structure

文章编号:: 1673-2049(2026)01-0209-12

作者:: 李建华^1,2，邓强¹，李保罗²，唐国旺¹，樊健生^2,3，刘宇飞^2,3; (1. 北京城建集团有限责任公司，北京100084； 2. 清华大学土木工程系，北京 100084； 3. 清华大学土木工程安全与耐久教育部重点实验室，北京 100084）

Author(s):: LI Jianhua^1,2, DENG Qiang¹, LI Baoluo², TANG Guowang¹, FAN Jiansheng^2,3, LIU Yufei^2,3; （1. Beijing Urban Construction Group Co., Ltd., Beijing 100084, China; 2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 3. Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education, Tsinghua University, Beijing 100084, China）

关键词:: 大跨空间结构; 施工监测; 太阳辐射; 日照阴影; 温度场

Keywords:: large-span spatial structure; construction monitoring; solar radiation; sunlight shadow; temperature field

分类号:: TU393.3

DOI:: 10.19815/j.jace.2024.11075

文献标志码:: A

摘要:: 为提高大跨度双向曲线钢桁架屋盖结构施工阶段温度荷载量化及结构位形预测精度，探究日照非均匀温度场的影响机制及计算方法，依托合肥新桥国际机场航站楼大跨度双向曲线钢桁架屋盖，搭建日照非均匀温度场的数值模拟框架。通过分析导热微分方程及定解条件，建立了第二类和第三类边界条件的数学模型。开发了考虑地理气象要素和杆件遮挡作用的温度场数值模拟方法，建立了气象要素和结构温度监测系统标定导热微分方程的边界条件并验证数值模拟方法的有效性，分析了各种天气类型下结构温度场分布及其时空特性。结果表明：标定太阳辐射吸收率等关键参数后，模拟结果与监测数据吻合较好；在太阳辐射作用下，大跨度双向曲线钢桁架屋盖结构内形成复杂阴影场，杆件遮挡作用显著，不可忽略；屋盖结构温度场的时空效应十分突出，不同天气状况下具有显著差异性；晴天时结构时空效应更为显著，多云时可简化为均匀温度荷载；所提数值模拟方法能准确反映结构施工阶段日照非均匀温度场，为结构拼装合拢、施工方案优化及位形精度控制提供了可靠的指导。

Abstract:: In order to improve the quantification of temperature loads and the accuracy of structural configuration prediction during the construction phase of largespan bidirectional curved steel truss roof structures, and to explore the influence mechanism and calculation method of nonuniform temperature fields caused by sunlight, a numerical simulation framework for nonuniform temperature fields caused by sunlight was constructed based on the largespan bidirectional curved steel truss roof of Hefei Xinqiao International Airport Terminal. By analyzing the differential equation of thermal conductivity and the definite solution conditions, mathematical models for the second and third types of boundary conditions were established. A numerical simulation method for temperature fields that took into account geographical and meteorological elements as well as the shielding effect of structural components was developed. A monitoring system for meteorological elements and structural temperature was established to calibrate the boundary conditions of the heat conduction differential equation, and the effectiveness of the numerical simulation method was verified. The distribution and spatiotemporal characteristics of structural temperature fields under various weather types were also analyzed. The results show that after calibrating key parameters such as solar radiation absorption rate, the simulation results are in good agreement with the monitoring data. Under the influence of solar radiation, a complex shadow field is formed inside the largespan bidirectional curved steel truss roof structure, and the shielding effect of the members is significant and cannot be ignored. The spatiotemporal effect of temperature field in roof structure is very prominent, with significant differences under different weather conditions. The spatiotemporal effect of the structure is more significant on sunny days, and can be simplified as a uniform temperature load on cloudy days. The proposed numerical simulation method can accurately reflect the nonuniform temperature field of sunlight during the structural construction stage, providing reliable guidance for structural assembly and closure, construction scheme optimization, and configuration accuracy control.

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

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