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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.
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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, A. Akl, O. Shallan, “DYNAMIC ANALYSIS OF TUNNEL”, Proceedings of the International Congress on Tunneling and ground Conditions, 3-7 April 1994, national Authority for Tunnels, Cairo, Egypt.", Proceedings of the International Congress on Tunneling and ground Conditions national Authority for Tunnels, Cairo, Egypt., 1994
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam and M. Mashhour, “EFFECT OF FOOTING DIMENSIONS ON THE CONTACT PRESSURE AND INTERNAL STRESSES FOR A STRIP FOOTING” 24 Journal of Egyptian Society of Engineers, No.1, Vol.:P9-14,", 24 Journal of Egyptian Society of Engineers, No.1, Vol.:P9-14,, 1985
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Elsayed saad Abdelsalam Salman, "S. Abdel Salam, H.O. Soliman, O. Shallan, and Alaa M. Saad “SENSITIVITY ANALYSIS OF GEOMETRIC NON-LINEAR PARAMETERS ON CABLE–STAYED BRIDGES”11th Internal. Colloquium On Structural and Geot Eng. 17-19 May 2005 , Ain Shams Univ. , Cairo , Eg", S. Abdel Salam, H.O. Soliman, O. Shallan, and Alaa M. Saad “SENSITIVITY ANALYSIS OF GEOMETRIC NON-LINEAR PARAMETERS ON CABLE–STAYED BRIDGES”11th Inte, 2005
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Elsayed saad Abdelsalam Salman, "A. Elshihy, H. Shihab , S. Abdel Salam, M. Saleeb, “ SHORT-TERM AND LONG-TERM DEFLECTIONS OF FULLY COMPOSITE STEEL-CONCRETE BEAMS”, Proceedings of 8th Arab Structural Engg. Conference, Cairo University, Cairo Egypt, October, 2000.", Proceedings of 8th Arab Structural Engg. Conference, Cairo University, Cairo Egypt, 2000
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Mohammed Reda Ali Elewa, "Behavior of steel I-beam embedded in normal and steel fiber reinforced concrete incorporating demountable bolted connectors", Elsevier, 2019
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