纵向钢筋部分脱落的修复钢筋混凝土梁结构性能研究

IF 2.1 4区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Advances in Structural Engineering Pub Date : 2024-03-05 DOI:10.1177/13694332241237582

Tsubasa Hattori, Hiroyasu Sakata, Yusuke Maida, Akihiro Kawahara, Toshio Maegawa

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引用次数: 0

摘要

为了评估纵向钢筋部分脱落的修复后 RC 梁的结构性能，我们进行了结构实验。在实验中，实际尺寸和半尺寸的 RC 梁试件承受了变形角为 1.0% 或更小的循环加载，然后用环氧树脂注入法进行了修复，并再次承受了多次循环加载。实验结果表明，纵向钢筋部分脱胶的试样在修复后仍能抑制损伤。此外，与采用粘结纵向钢筋的试样相比，采用部分脱粘纵向钢筋的试样在修复后的初始刚度恢复较高。此外，通过对修复裂缝所需的成本进行研究，证实采用部分脱粘纵向钢筋的 RC 梁在修复时使用的材料数量较少，与具有标准粘结特性的 RC 梁相比，修复成本有可能降低约 50%。

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Study on structural performance of repaired reinforced concrete beams with partially debonded longitudinal rebars

In order to evaluate the structural performance of repaired RC beams with partially debonded longitudinal rebars, structural experiments were conducted. In the experiments, real-scale and half-scale RC beam specimens underwent cyclic loading of 1.0% or less in terms of deformation angle, repaired with epoxy resin injection method, and multiple cyclic loading again. As a result of the experiments, damage was suppressed in specimens with partially debonded longitudinal rebars even after repairs. Further, the specimens with partially debonded longitudinal rebars exhibited high recovery of initial stiffness after repair compared to the specimen with bonded longitudinal rebars. In addition, from study of the costs required to repair cracks, it was confirmed that RC beams with partially debonded longitudinal rebars used smaller quantities of materials used for repairs and could potentially reduce repair cost by approximately 50% compared to RC beams having standard bonding properties.

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来源期刊

Advances in Structural Engineering 工程技术-工程：土木

CiteScore

5.00

自引率

11.50%

发文量

230

审稿时长

2.3 months

期刊介绍： Advances in Structural Engineering was established in 1997 and has become one of the major peer-reviewed journals in the field of structural engineering. To better fulfil the mission of the journal, we have recently decided to launch two new features for the journal: (a) invited review papers providing an in-depth exposition of a topic of significant current interest; (b) short papers reporting truly new technologies in structural engineering.