| 预应力钢柱火灾下的力学特征有限元分析 |
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| 引用本文： | 周文明,胡 妍. 预应力钢柱火灾下的力学特征有限元分析[J]. 安徽建筑大学学报, 2016, 24(2): 11-15. DOI: 10.11921/j.issn.2095-8382.20160203 |
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| 作者姓名： | 周文明 胡 妍 |
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| 作者单位： | 安徽建筑大学 土木工程学院,安徽合肥,230601;安徽建筑大学 土木工程学院,安徽合肥,230601 |
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| 基金项目： | 国家重点基础研究发展计划项目(2012CB719703)，安徽高校省级自然科学研究重大项目(KJ2014ZD06)，安徽省自然科学基金(1408085QE96)。 |
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| 摘 要： | 利用ANSYS有限元分析软件,对两种不同工况的预应力钢柱在非均匀温度场(火灾)中的受力情况进行分析。通过对构件的温度场和热力耦合分析,得出预应力钢柱在各个时刻的力学特性,并与相同工况下的理论解进行对比,得出其误差在合理范围之内。研究表明:预应力撑杆对钢柱的横向位移的变化起到约束作用;随着温度升高,预应力钢柱的变形也随之加大,钢柱截面愈小预应力钢柱变形愈大。
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| 关 键 词： | 预应力钢梁 高温(火灾) 预应力损失 变形特性 温度 钢索 |
Finite Element Analysis of the Mechanical Properties of the Prestressed Steel Column in the fire |
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| ZHOU Wenming and HU Yan. Finite Element Analysis of the Mechanical Properties of the Prestressed Steel Column in the fire[J]. Journal of Anhui Jianzhu University, 2016, 24(2): 11-15. DOI: 10.11921/j.issn.2095-8382.20160203 |
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| Authors: | ZHOU Wenming and HU Yan |
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| Affiliation: | School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China and School of Civil Engineering, Anhui Jianzhu University, Hefei 230601, China |
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| Abstract: | By using ANSYS ifnite element analysis software, the force condition of the prestressed steel columns, in two different working conditions in a non-uniform temperature ifeld has been analyzed. Through the analysis of the temperature ifeld and thermal coupling of the component, the mechanical properties of prestressed steel columns in each moment were obtained and it s error is within a reasonable range comparing with the theoretical solutions in the same working conditions. The result shows that the pre-stress struts constraints the transverse displacement of the steel columns; the deformation of prestressing steel columns increases with the temperature increases and also increases with the decreases of the column section size. |
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| Keywords: | prestressed steel column ifre loss of prestressed deformation characteristics |
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