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Experimental and numerical assessment of optimized hybrid strengthening techniques for unreinforced masonry columns under axial compression
Faculty
Engineering
Year:
2025
Type of Publication:
ZU Hosted
Pages:
Authors:
Mohammed Reda Ali Elewa
Staff Zu Site
Abstract In Staff Site
Journal:
Structures Elsevier
Volume:
81
Keywords :
Experimental , numerical assessment , optimized hybrid strengthening
Abstract:
This study presents a comprehensive experimental and numerical investigation into the axial performance of unreinforced masonry (URM) columns strengthened with various hybrid retrofitting techniques. Thirteen full- scale brick masonry columns were tested under monotonic axial compression to evaluate the effects of strain- hardening cementitious composites (SHCC) jacketing, near-surface mounted (NSM) steel bars, and embedded steel/glass fiber reinforced polymer (GFRP) mesh. The experimental program examined load–displacement behavior, failure modes, ultimate capacity, ductility, and energy absorption. Results demonstrated that hybrid strengthening combining NSM bars and mesh-reinforced SHCC jacketing achieved up to 70 % increase in load capacity and double the energy absorption compared to the unstrengthened reference. A validated finite element model, developed in ABAQUS using cohesive damage and embedded interaction approaches, accurately replicated the experimental response, with an average experimental-to-numerical load ratio of 0.95 and displacement ratio of 0.90. Parametric studies showed that increasing longitudinal reinforcement ratio in hybrid systems enhanced axial capacity by up to 39 %, while increasing transverse mesh ratio improved strength by 25 % before plateauing. These findings highlight the synergistic role of axial and transverse reinforcement in improving strength and ductility and offer a reliable modeling framework for optimizing retrofit designs of URM columns in seismic and structural upgrade applications.
Author Related Publications
Mohammed Reda Ali Elewa, "Flexural response and load capacity of reinforced concrete beams strengthened with reinforced mortar layer", Elsevier, 2021
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Mohammed Reda Ali Elewa, "Experimental and theoretical study on the compressive strength of the high strength concrete incorporating steel fiber and metakaolin", Elsevier, 2021
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Mohammed Reda Ali Elewa, "Behavior of ECC columns confined using steel wire mesh under axial loading", Elsevier, 2021
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Mohammed Reda Ali Elewa, "Effect of Cement Alternative on the Mechanical Properties of Self Compacting Concrete Using Variable Aggregate Types", Faculty of Engineering - Zagazig University, 2011
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Mohammed Reda Ali Elewa, "Effect of sustained loading and environmental conditions on the creep behavior of an epoxy adhesive for concrete structures strengthened with CFRP laminates", elsevier, 2017
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Department Related Publications
Elsayed saad Abdelsalam Salman, "S. Abdel Salam, H.O. Soliman, E. ELshamy, M.Ismail. “ACTIVE CONTROL OF SEISMICALLY EXCITED STRUCTURES USING POLE ASSIGNMENT METHOD” Scientific Bulletin, Ain Shams Univ., Faculty Of Engineering, Cairo, Egypt, December 31,2005.", Scientific Bulletin, Ain Shams Univ., Faculty Of Engineering, Cairo, Egypt,, 2006
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam, G. Abdelah, and M. El-Kilany, “EXPERIMENTAL AND NUMERICAL STRESS ANALYSIS OF COMPINED STRIP FOOTING”, Proceedings of 11th. Annual Operations Research Conference (First International Confe.), November 28-30, 1988, Zagazig Uni", Proceedings of 11th. Annual Operations Research Conference (First International Confe.), Zagazig Univ., Egypt., 1988
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Elsayed saad Abdelsalam Salman, "M. Mashhour, S. Abdel Salam, and S., ELnaggar, “EFFECT OF LOSS OF SUPPORT ON THE BEHAVIOUR OF COMPINED FOOTING ”, Proceedings of 3rd Arab Structural Eng. Conference, United Arab Emirates Univ., Fac. of Engg., March, 1989, Vol. 3.", Proceedings of 3rd Arab Structural Eng. Conference, United Arab Emirates Univ., Fac. of Eng., Vol. 3., 1989
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam, M. Mashhour, “REPAIR OF 3 BUILDING FOUNDATION IN CAIRO”, Proceedings of Conf. of Building Deterioration in the Arab world, Faculty of Engg., El- Malik Saud Univ., Riyad , K.S.A , March 1992.", Proceedings of Conf. of Building Deterioration in the Arab world, Faculty of Engg., El- Malik Saud Univ., Riyad , K.S.A, 1992
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam, M. Mashhour, and M. Hussein, “THE ANALYSIS OF INTERNAL STRESSES IN A CONTINUOUS FOOTINGUSIN PHOTOELASTICITY” , Bulletin of Fac. of Engg., Cairo Univ., No. 2, Vol. 36, June 1989.", Bulletin of Fac. of Engg., Cairo Univ., No. 2, Vol. 36, 1989
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