Shear strengthening of RC beams with thin panels of mortar reinforced with recycled steel fibres

JOURNAL OF CLEANER PRODUCTION

卷:194

Article

Lourenco, Lucio¹  Zamanzadeh, Ziaaddin²  Barros, Joaquim A. O.³  Rezazadeh, Mohammadali³ 

[1] CiviTest, Rua Ind 144, P-4770160 Jesufrei, Vn Famalicao, Portugal

[2] Islamic Azad Univ, Bostanabad Branch, Dept Civil Engn, Bostanabad, Iran

[3] Univ Minho, Dept Civil Engn, Campus Azurem, P-4800058 Guimaraes, Portugal

关键词: Recycled steel fibre;    Cement based mortar;    Shear strengthening;    FEM analysis;    Numerical simulation;    Analytical approach;   

DOI  :  10.1016/j.jclepro.2018.05.096

来源: Elsevier

【 摘 要 】

The use of thin cement based panels reinforced with relatively high content of Recycled Steel Fibres (RSF) for the shear strengthening of Reinforced Concrete (RC) beams is investigated in the present work. The mechanical properties of this Recycled Steel Fibre Reinforced Mortar (RSFRM) are characterised. The panels are produced by using a mixing technique similar to the one used in the slurry infiltrated fibre concrete technology. Then, their potentialities as a shear strengthening solution for RC beams deficiently reinforced in shear are investigated by performing three-point bending tests with RC beams of I shape cross section. The RSFRM panels are applied in the lateral faces of the beams by using the two following strategies: (1) bonded to the concrete substrate by applying exclusively epoxy adhesive; and (2) besides epoxy adhesive, mechanical fasteners are applied. The applicability of an analytical approach for estimating the contribution of RSFRM panels for the shear resistance of RC beams is assessed, and a design example is presented. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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