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Evaluation of shrinkage-induced stress in a runway repaired using compliant polymer concrete

机译：评估使用柔性聚合物混凝土修复的跑道中的收缩引起的应力

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The aim of this study is to investigate shrinkage-induced stresses in a part of a runway pavement repaired using compliant polymer concrete. For this purpose, material properties of partially cured polymer concrete at different degrees of cure during the cure process were estimated and used in the stress analysis. To measure the degree of cure and shrinkage strain in the repaired part, a monitoring system comprising dielectrometry and fiber Bragg grating (FBG) optic sensors was installed in an airport (Gimpo airport, Korea). The shrinkage strain values measured at the various degrees of cure of the polymer concrete were used in finite element analysis to estimate shrinkage-induced stresses. To improve accuracy of stress analysis, property change of the polymer concrete during the curing process were also considered. It was concluded that property variations during the curing process should be considered for estimating material failure because the cure shrinkage of the repair material induces tensile stress following the critical loading pattern of concretes. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究的目的是研究使用柔性聚合物混凝土修复的部分跑道路面的收缩引起的应力。为此，估算了固化过程中不同固化程度的部分固化聚合物混凝土的材料性能，并将其用于应力分析。为了测量修复零件中的固化和收缩应变程度，在机场（韩国金浦机场）安装了包括介电法和光纤布拉格光栅（FBG）光学传感器的监控系统。在聚合物混凝土不同养护度下测得的收缩应变值用于有限元分析中，以估算收缩引起的应力。为了提高应力分析的准确性，还考虑了在固化过程中聚合物混凝土的性能变化。得出的结论是，应考虑固化过程中的性能变化，以评估材料的失效，因为修补材料的固化收缩会在混凝土的临界载荷模式下产生拉伸应力。 （C）2016 Elsevier Ltd.保留所有权利。

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