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碳纤维线电热混凝土道面板温升速率影响因素显著性分析
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V351

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A Significance Analysis of Influence Factors on Carbon Fiber Heating Wire Concrete Pavement Slab Temperature Rising
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    摘要:

    碳纤维线电热混凝土道面板的温升速率与多种因素有关,为了研究“工作电流强度”“发热线布置埋深”“发热线间距”3个因素对混凝土道面板温升速率影响的显著性,运用ANSYS建模进行试验并获取数据,采用正交法和响应面法进行数据分析,并通过现场试验进行验证。正交法所得埋深的F值为13.634,间距的F值为25.605,工作电流强度的F值为14.431;响应面法所得埋深的P值为0.037 5,间距的P值为0.012 6,工作电流强度的P值为0.015 0。通过分析可以发现3个因素对于混凝土板温升速率的影响都较为显著,且显著性大小顺序为B(碳纤维线间距)>C(工作电流强度)>A(碳纤维线埋深),由DX软件分析得到温升速率的拟合方程:α=2.73-0.077A-0.099B+0.096C+0.008AB+0.013AC+0.01BC-0.097A2+0.028B2-0.063C2,并由此得到碳纤维发热线间距为80 mm,埋深为50~90 mm,工作电流强度为05~1.0 A时,道面板温升速率满足融雪化冰要求。

    Abstract:

    The temperature rising rate of carbon fiber reinforced concrete pavement slab has relations with many factors. In order to study the significance of influence of three factors, i. e. the working current intensity, the heating wire buried depth and spacing, on the temperature rising rate of the concrete, this paper uses ANSYS to modeling to test and obtains data by adopting orthogonal method and response surface methodology to analyze, and uses field test to verify. The F value of buried depth, spacing and temperature obtained by orthogonal method is respectively 13.634, 25.605 and 14.431. The P value of three factors obtained by response surface methodology is respectively 0.0375, 0.0126 and 0.0150. The analysis shows that these three factors have a significant effect on the temperature rising rate of concrete, and the order is B heating wire spacing> C working current intensity> A heating wire buried depth. The fitting equation of temperature rising rate obtained by DX is:α=2.73-0.077A-0.099B+0.096C+0.008AB+0.013AC+0.01BC-0.097A2+0.028B2-0.063C2, thus it can also be obtained that the spacing of heating wire is 80 mm, buried depth is 50~90 mm, working current intensity is 0.5~1.0 A, and the temperature rising rate meets the requirements of pavement slab deicing and snow melting.

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张楚杰,许巍,蔡良才,李春鸣.碳纤维线电热混凝土道面板温升速率影响因素显著性分析[J].空军工程大学学报,2017,18(5):55-60

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  • 在线发布日期: 2017-10-25
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