Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire
In the past three decades, one-dimensional (1D) thermal model was usually used to estimate the thermal responses of glass fiber-reinforced polymer (GFRP) materials and structures. However, the temperature gradient and mechanical degradation of whole cross sections cannot be accurately evaluated. To...
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Series: | Advances in Materials Science and Engineering |
Online Access: | http://dx.doi.org/10.1155/2017/1705915 |
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doaj-bd1b6536bfd44e9b9cd62314f12be9522020-11-24T22:57:08ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422017-01-01201710.1155/2017/17059151705915Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to FireLingfeng Zhang0Weiqing Liu1Guoqing Sun2Lu Wang3Lingzhi Li4School of Civil Engineering, Southeast University, Nanjing, ChinaSchool of Civil Engineering, Southeast University, Nanjing, ChinaCollege of Civil Engineering, Nanjing Tech University, Nanjing, ChinaCollege of Civil Engineering, Nanjing Tech University, Nanjing, ChinaCollege of Civil Engineering, Tongji University, Shanghai, ChinaIn the past three decades, one-dimensional (1D) thermal model was usually used to estimate the thermal responses of glass fiber-reinforced polymer (GFRP) materials and structures. However, the temperature gradient and mechanical degradation of whole cross sections cannot be accurately evaluated. To address this issue, a two-dimensional (2D) thermomechanical model was developed to predict the thermal and mechanical responses of rectangular GFRP tubes subjected to one-side ISO-834 fire exposure in this paper. The 2D governing heat transfer equations with thermal boundary conditions, discretized by alternating direction implicit (ADI) method, were solved by Gauss-Seidel iterative approach. Then the temperature-dependent mechanical responses were obtained by considering the elastic modulus degradation from glass transition and decomposition of resin. The temperatures and midspan deflections of available experimental results can be reasonably predicted. The overestimation of deflections could be attributed to the underestimation of bending stiffness. This model can also be extended to simulate the thermomechanical responses of beams and columns subjected to multiside fire loading, which may occur in real fire scenarios.http://dx.doi.org/10.1155/2017/1705915 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Lingfeng Zhang Weiqing Liu Guoqing Sun Lu Wang Lingzhi Li |
spellingShingle |
Lingfeng Zhang Weiqing Liu Guoqing Sun Lu Wang Lingzhi Li Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire Advances in Materials Science and Engineering |
author_facet |
Lingfeng Zhang Weiqing Liu Guoqing Sun Lu Wang Lingzhi Li |
author_sort |
Lingfeng Zhang |
title |
Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire |
title_short |
Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire |
title_full |
Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire |
title_fullStr |
Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire |
title_full_unstemmed |
Two-Dimensional Modeling of Thermomechanical Responses of Rectangular GFRP Profiles Exposed to Fire |
title_sort |
two-dimensional modeling of thermomechanical responses of rectangular gfrp profiles exposed to fire |
publisher |
Hindawi Limited |
series |
Advances in Materials Science and Engineering |
issn |
1687-8434 1687-8442 |
publishDate |
2017-01-01 |
description |
In the past three decades, one-dimensional (1D) thermal model was usually used to estimate the thermal responses of glass fiber-reinforced polymer (GFRP) materials and structures. However, the temperature gradient and mechanical degradation of whole cross sections cannot be accurately evaluated. To address this issue, a two-dimensional (2D) thermomechanical model was developed to predict the thermal and mechanical responses of rectangular GFRP tubes subjected to one-side ISO-834 fire exposure in this paper. The 2D governing heat transfer equations with thermal boundary conditions, discretized by alternating direction implicit (ADI) method, were solved by Gauss-Seidel iterative approach. Then the temperature-dependent mechanical responses were obtained by considering the elastic modulus degradation from glass transition and decomposition of resin. The temperatures and midspan deflections of available experimental results can be reasonably predicted. The overestimation of deflections could be attributed to the underestimation of bending stiffness. This model can also be extended to simulate the thermomechanical responses of beams and columns subjected to multiside fire loading, which may occur in real fire scenarios. |
url |
http://dx.doi.org/10.1155/2017/1705915 |
work_keys_str_mv |
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1725651727014690816 |