外部聚合物水泥砂浆粘结 FRP 网格剪力增强型钢筋混凝土梁的数值分析

IF 3 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Structural Concrete Pub Date : 2024-06-26 DOI:10.1002/suco.202400054

Ahmed Monier, Mohamed A. Saifeldeen, Nariman Fouad

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引用次数: 0

摘要

本文介绍了一种有限元 (FE) 建模方法，用于评估使用外部聚合物水泥砂浆 (PCM) 粘结玄武岩纤维增强聚合物 (BFRP) 网格的钢筋混凝土 (RC) 梁的剪切加固性能。研究首先进行了双剪切粘结试验的实验程序和 FE 建模，模拟了 BFRP 网格和带有 PCM 的 RC 梁之间的粘结行为。随后，BFRP 剪力加固梁的 FE 模型探讨了关键参数，包括剪力跨度与深度比、粘结剂类型（PCM 和环氧树脂）以及 BFRP 网格条与梁轴线之间的夹角。与实验结果的对比分析验证了 FE 模型的准确性。此外，还对 BFRP 加固比这一关键参数进行了数值研究，结果表明，在 1.33% 至 1.55% 的比率范围内，采用外部粘结复合加固砂浆加固的梁的最大荷载和挠度都会增加。

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Numerical analysis of reinforced concrete beams enhanced in shear with external polymer cement mortar‐bonded FRP grid

This paper presents a finite element (FE) modeling approach to assess the performance of reinforced concrete (RC) beams strengthened in shear using external polymer cement mortar (PCM)‐bonded basalt fiber‐reinforced polymer (BFRP) grids. The study begins with an experimental program and FE modeling of a double shear bond test, simulating the bond behavior between the BFRP grid and RC beams with PCM. Subsequently, a FE model for BFRP shear‐strengthened beams explores key parameters, including shear span to depth ratio, bonding agent type (PCM and epoxy resin), and angles between BFRP grid bars and the beam axis. Comparative analysis with experimental results verifies the accuracy of the FE models. Additionally, a critical parameter, the BFRP reinforcement ratio, is numerically investigated, revealing that achieving a ratio between 1.33% and 1.55% enhances both maximum load and deflection in beams strengthened with externally bonded composite reinforced mortar.

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来源期刊

Structural Concrete CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

5.60

自引率

15.60%

发文量

284

审稿时长

3 months

期刊介绍： Structural Concrete, the official journal of the fib, provides conceptual and procedural guidance in the field of concrete construction, and features peer-reviewed papers, keynote research and industry news covering all aspects of the design, construction, performance in service and demolition of concrete structures. Main topics: design, construction, performance in service, conservation (assessment, maintenance, strengthening) and demolition of concrete structures research about the behaviour of concrete structures development of design methods fib Model Code sustainability of concrete structures.