Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation
A finite element thermal analysis was conducted in this study with the aim of evaluating the influence of the geometrical parameters of steel sections on their thermal response under solar radiation. Four W12 and W24 standard steel beams were investigated under the solar irradiation conditions of a...
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MDPI AG
2021-10-01
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| Series: | Applied Sciences |
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| author | Sallal R. Abid Thaar S. Al-Gasham Junqing Xue Yongjian Liu Jiang Liu Bruno Briseghella |
| author_facet | Sallal R. Abid Thaar S. Al-Gasham Junqing Xue Yongjian Liu Jiang Liu Bruno Briseghella |
| author_sort | Sallal R. Abid |
| collection | DOAJ |
| description | A finite element thermal analysis was conducted in this study with the aim of evaluating the influence of the geometrical parameters of steel sections on their thermal response under solar radiation. Four W12 and W24 standard steel beams were investigated under the solar irradiation conditions of a sunny summer day. The finite element analysis was carried out using COMSOL Multiphysics considering the Sun’s movement from sunrise to sunset, reflected radiation from the ground, surface convection of air and long wave radiation as the main boundary thermal loads. The temperature-time variation at different locations in the sections, vertical temperature distributions, temperature gradient distributions and thermal stress distributions were investigated. The results showed that the daily maximum temperatures, temperature variation, temperature and temperature gradient distributions and thermal stresses are influenced by the geometry of the steel section. The flange width and flange thickness were found to be the controlling parameters during the noon hours, while these parameters in addition to web depth control the shading effect during the afternoon. On the other hand, web thickness affects the temperature of webs at sunrise and sunset times. Geometrical ratios like <i>W</i><sub>f</sub>/<i>H</i>, <i>W</i><sub>f</sub>/<i>t</i><sub>f</sub><sup>2</sup> and 2<i>W</i><sub>f</sub>/<i>Ht</i><sub>f</sub> were the most influential parameters on temperatures, temperature gradients and thermal stresses of steel beams subjected to solar radiation. The investigated section with the maximum <i>W</i><sub>f</sub>/<i>t</i><sub>f</sub><sup>2</sup> value of 0.96 (W12 × 58) recorded the highest top-surface noon temperature, while section W24 × 84 with the lowest <i>W</i><sub>f</sub>/<i>t</i><sub>f</sub><sup>2</sup> value of 0.60 exhibited the lowest temperature. |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T07:05:51Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-8c09ecb1415c4afcb32523bb3baf76762023-11-22T15:49:09ZengMDPI AGApplied Sciences2076-34172021-10-011119919810.3390/app11199198Geometrical Parametric Study on Steel Beams Exposed to Solar RadiationSallal R. Abid0Thaar S. Al-Gasham1Junqing Xue2Yongjian Liu3Jiang Liu4Bruno Briseghella5Civil Engineering Department, University of Wasit, Kut 52001, IraqCivil Engineering Department, University of Wasit, Kut 52001, IraqCollege of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaSchool of Highway, Chang’an University, Xi’an 710054, ChinaSchool of Highway, Chang’an University, Xi’an 710054, ChinaCollege of Civil Engineering, Fuzhou University, Fuzhou 350108, ChinaA finite element thermal analysis was conducted in this study with the aim of evaluating the influence of the geometrical parameters of steel sections on their thermal response under solar radiation. Four W12 and W24 standard steel beams were investigated under the solar irradiation conditions of a sunny summer day. The finite element analysis was carried out using COMSOL Multiphysics considering the Sun’s movement from sunrise to sunset, reflected radiation from the ground, surface convection of air and long wave radiation as the main boundary thermal loads. The temperature-time variation at different locations in the sections, vertical temperature distributions, temperature gradient distributions and thermal stress distributions were investigated. The results showed that the daily maximum temperatures, temperature variation, temperature and temperature gradient distributions and thermal stresses are influenced by the geometry of the steel section. The flange width and flange thickness were found to be the controlling parameters during the noon hours, while these parameters in addition to web depth control the shading effect during the afternoon. On the other hand, web thickness affects the temperature of webs at sunrise and sunset times. Geometrical ratios like <i>W</i><sub>f</sub>/<i>H</i>, <i>W</i><sub>f</sub>/<i>t</i><sub>f</sub><sup>2</sup> and 2<i>W</i><sub>f</sub>/<i>Ht</i><sub>f</sub> were the most influential parameters on temperatures, temperature gradients and thermal stresses of steel beams subjected to solar radiation. The investigated section with the maximum <i>W</i><sub>f</sub>/<i>t</i><sub>f</sub><sup>2</sup> value of 0.96 (W12 × 58) recorded the highest top-surface noon temperature, while section W24 × 84 with the lowest <i>W</i><sub>f</sub>/<i>t</i><sub>f</sub><sup>2</sup> value of 0.60 exhibited the lowest temperature.https://www.mdpi.com/2076-3417/11/19/9198solar radiationair temperaturesteel beamtemperature gradientthermal stress |
| spellingShingle | Sallal R. Abid Thaar S. Al-Gasham Junqing Xue Yongjian Liu Jiang Liu Bruno Briseghella Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation Applied Sciences solar radiation air temperature steel beam temperature gradient thermal stress |
| title | Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation |
| title_full | Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation |
| title_fullStr | Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation |
| title_full_unstemmed | Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation |
| title_short | Geometrical Parametric Study on Steel Beams Exposed to Solar Radiation |
| title_sort | geometrical parametric study on steel beams exposed to solar radiation |
| topic | solar radiation air temperature steel beam temperature gradient thermal stress |
| url | https://www.mdpi.com/2076-3417/11/19/9198 |
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