钢筋损伤和无损伤的钢筋混凝土梁的承载力

IF 1.9 Q3 ENGINEERING, INDUSTRIAL
R. Khmil, Z. Blikharskyy, P. Vegera, N. Kopiika
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引用次数: 0

摘要

本文介绍了钢筋混凝土梁在有和无内筋损伤的情况下的承载力计算结果。钢筋混凝土行业生产的主要要素之一是梁。试验分析表明,受拉主筋损伤的钢筋混凝土梁,由于钢筋截面的减小,其承载力与对照未损伤试件相比有所下降。然而,受拉主筋为dst 20А500C的钢筋混凝土梁的承载力,其横截面面积等于钢筋的截面面积,其承载力比未受拉主钢筋的钢筋的承载力高3.7…24.0%。这是由于所使用的热强化钢筋A500C的材料性能不均匀。在测试过程中,当受拉主筋因钻孔而受损时,大多数损伤发生在物理和机械特性较低的核心部位。相反,具有较大物理和机械特性的外部热强化层受到的损伤程度较小。对所得结果的分析表明,在有损伤的钢筋混凝土梁的设计中,有必要考虑使用热补强非均匀钢A500C作为受拉主筋。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bearing capacity of reinforced concrete beams with and without damages of rebar
Abstract The article presents the results of the bearing capacity of reinforced concrete beams with and without damages of internal reinforcement. One of the main elements of the production of the reinforced concrete industry is beams. The analysis of the experimental tests showed that the bearing capacity of reinforced concrete beams with damaged tensile main reinforcement decreases according to control undamaged samples due to the reduction of the reinforcement cross-section. However, the bearing capacity of reinforced concrete beams with tensile main reinforcement Ø20А500C, damaged to the cross-section area equal the rebar Ø16mm is more on 3.7… 24.0% than the bearing capacity of reinforced concrete beams with undamaged Ø16mm rebar. This is due to the non-uniform material properties of used thermally strengthened reinforcement A500C. When during testing the tensile main reinforcement is damaged by drilling a hole, the most damages occur in the core with lower physical and mechanical characteristics. In contrast, the outer thermally strengthened layer with bigger physical and mechanical characteristics is damaged to a lesser extent. The analysis of the obtained results shows that during design of reinforced concrete beams with damaged, it is necessary to consider using thermally strengthened non-uniform steel A500C as tensile main reinforcement.
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来源期刊
Production Engineering Archives
Production Engineering Archives Engineering-Industrial and Manufacturing Engineering
CiteScore
6.10
自引率
13.00%
发文量
50
审稿时长
6 weeks
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