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《工程(英文)》 >> 2019年 第5卷 第6期 doi: 10.1016/j.eng.2019.02.012

混凝土结构性干预所必需的材料力学性能

a Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
b College of Civil and Transportation Engineering, Shenzhen University, Shenzhen 518060, China

收稿日期: 2018-09-18 修回日期: 2019-02-10 录用日期: 2019-02-25 发布日期: 2019-09-30

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摘要

结构性干预包括修复和(或)改善结构性能。除了混凝土和钢材这两种典型的混凝土结构材料外,各种纤维增强复合材料(FRP),混合纤维、聚合物和黏合剂的黏结材料也常被用于结构性干预。为了预测结构性能,有必要开发一种不仅适用于钢材,而且适用于其他材料的通用方法。这种通用模型可以提供有关改善结构性能所需的力学性能的信息。外部黏结是一种典型的结构干预方案,在新结构中没有得到应用。为了在基体混凝土和外部黏结材料的接合点上获得更好的黏结强度,我们有必要阐明材料的性能和结构细节。本文介绍基体混凝土的力学性能和相关干预材料用于以下目的:①获得更高的抗剪强度和减少构件在结构性干预后的极限变形;②使外部黏结获得更高的黏结强度。本文得出的结论是,在有结构干预的结构中,为了提高结构的力学性能,干预材料的一些力学性能和结构细节是新的,且不同于没有干预的结构。例如,在无结构性干预的结构中,高强度和高刚度是材料的重要性能,而高断裂应力和低刚度是结构干预材料的重要性能。

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