再生钢纤维增强水泥基砂浆板在混凝土梁抗弯加固中的应用

IF 1.3 Q3 ENGINEERING, MULTIDISCIPLINARY

International Journal of Engineering and Technology Innovation Pub Date : 2021-01-01 DOI:10.46604/ijeti.2021.7623

Ziaaddin Zamanzadeh, Farzin Hosseinzadeh, M. Bashiri

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引用次数: 4

摘要

本研究展示了为混凝土梁设计的弯曲加固技术的有效性，其中使用再生钢纤维增强砂浆(RSFRM)板作为普通钢纤维的环保替代品。首先通过对160 × 400 × 400 mm3缺口梁样试件进行三点弯曲试验，然后对100 × 100 × 100 mm3立方体试件进行压缩试验，对不同的RSFRM配合比设计进行了实验研究，以优化配合比设计。对加固和未加固梁进行了有限元分析，以验证基于RSFRM板的加固技术的有效性。从缺口梁的试验出发，采用有限元反分析方法优化了RSFRM的参数，并将其实现到数值模型中。结果表明，采用RSFRM板不仅可以显著提高梁的承载能力(当纤维体积比为3%时，梁的承载能力可提高3.19倍)，而且可以使梁的断裂机制由脆性断裂转变为韧性断裂。

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Cement-Based Mortar Panels Reinforced with Recycled Steel Fibers in Flexural Strengthening of Concrete Beams

The effectiveness of a strengthening technique devised for the concrete beams subjected to bending is presented in this study, where recycled-steel fiber-reinforced mortar (RSFRM) panels are used as an eco-friendly replacement for ordinary steel fibers. Different mix designs for RSFRM are first investigated experimentally by testing 160 × 400 × 400 mm3 notched beam-like specimens in 3-point bending, while 100 × 100 × 100 mm3 cubes are tested in compression, to optimize the mix design. Finite element (FE) analyses are carried out on strengthened and non-strengthened beams to investigate the effectiveness of the proposed strengthening technique based on RSFRM panels. Starting from the tests on notched beams, an inverse FE analysis is used to optimize the RSFRM’s parameters to be implemented into the numerical model. The results show that applying RSFRM panels not only markedly increases the load-bearing capacity of the beams (up to 3.19 times with 3% of fibers by volume), but also changes their fracture mechanism from brittle to ductile fracture.

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来源期刊

International Journal of Engineering and Technology Innovation ENGINEERING, MULTIDISCIPLINARY-

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

12 weeks

期刊介绍： The IJETI journal focus on the field of engineering and technology Innovation. And it publishes original papers including but not limited to the following fields: Automation Engineering Civil Engineering Control Engineering Electric Engineering Electronic Engineering Green Technology Information Engineering Mechanical Engineering Material Engineering Mechatronics and Robotics Engineering Nanotechnology Optic Engineering Sport Science and Technology Innovation Management Other Engineering and Technology Related Topics.