考虑加固极限的纺织增强砂浆加固钢筋混凝土梁的抗弯性能评估

Evaluation of Flexural Behavior of Textile-Reinforced Mortar-Strengthened RC Beam Considering Strengthening Limit.

作者信息

Park Jongho, Park Sun-Kyu, Hong Sungnam

机构信息

Global Frontiers of Resilient EcoSmart City, Sungkyunkwan University, Suwon 16419, Korea.

Department of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University, Suwon 16419, Korea.

出版信息

Materials (Basel). 2021 Oct 28;14(21):6473. doi: 10.3390/ma14216473.

DOI:10.3390/ma14216473

PMID:34771997

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8585196/

Abstract

Textile-reinforced mortar (TRM) is a strengthening material in which textiles are attached to reinforced concrete (RC) structures using an inorganic matrix. Although many studies on structural behavior, various factors that affect TRM behavior could not be determined clearly. Especially, the uncertainty in bonds due to inorganic materials was not considered. In this study, the flexural behavior of TRM-strengthened beams was determined considering intermediate crack debonding occurred. The TRM beam strengthening limit and TRM coefficients were defined considering the possibility of premature failure and experimental results of four other research on 22 specimens. Therefore, it is expected that a conservative design would be possible when the suggested strengthening limit coefficient is applied.

摘要

纺织增强砂浆（TRM）是一种增强材料，其中纺织品通过无机基体附着在钢筋混凝土（RC）结构上。尽管对结构性能进行了许多研究，但影响TRM性能的各种因素仍无法明确确定。特别是，未考虑无机材料导致的粘结不确定性。在本研究中，考虑到中间裂缝脱粘的发生，确定了TRM增强梁的弯曲性能。考虑到过早破坏的可能性以及对22个试件的其他四项研究的实验结果，定义了TRM梁的增强极限和TRM系数。因此，预计应用建议的增强极限系数时可以进行保守设计。