| 带裂缝混凝土碳化深度预测模型 |
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| 引用本文： | 黄海新,李环宇,毛燕.带裂缝混凝土碳化深度预测模型[J].混凝土,2019(4):5-9,13. |
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| 作者姓名： | 黄海新 李环宇 毛燕 |
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| 作者单位： | 河北工业大学 土木与交通学院,天津,300401;交通运输部 公路科学研究所,北京,100080 |
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| 基金项目： | 国家重点研发计划;天津市交通运输科技发展计划 |
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| 摘 要： | 裂缝的存在大大的加深了碳化深度。为探索裂缝对混凝土碳化的影响,根据Fick第二定律和热传导方程的相似性,利用有限元软件建立了碳化仿真模型。开展了裂缝混凝土碳化试验,并根据试验数据调整了无裂缝、窄裂缝、宽裂缝有限元模型参数,进而对裂缝处混凝土碳化深度影响因素进行了模拟分析。结果表明,裂缝宽度比裂缝深度影响更大。提出了裂缝碳化深度增大系数,结合前人碳化深度模型,修正建立了带裂缝混凝土裂缝处碳化深度模型。
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| 关 键 词： | 裂缝 有限元 预测模型 混凝土碳化 |
Prediction model of carbonization depth with crack |
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| HUANG Haixin,LI Huanyu,MAO Yan.Prediction model of carbonization depth with crack[J].Concrete,2019(4):5-9,13. |
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| Authors: | HUANG Haixin LI Huanyu MAO Yan |
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| Affiliation: | (School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;The Department of Transportation Highway Research Institute,Beijing 100080,China) |
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| Abstract: | The existence of cracks greatly deepens the depth of carbonization.In order to explore the effect of crack on the carbonization of concrete,a finite element carbonization model is established by using the finite element software according to the similarity of the second law of Fick and the heat conduction equation.The carbonization test of concrete with crack is carried out,and the parameters of the finite element model with no crack,narrow crack and wide crack are adjusted according to the test data.The factors influencing the carbonization depth of concrete with crack are analyzed by the finite element model.The results show that the crack width is more affected than the crack depth.The increasing coefficient of crack carbonization depth is put forward.Finally,combined with the previous model of carbonation depth,a modified carbonization depth model in crack is established. |
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| Keywords: | crack finite element prediction model concrete carbonation |
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