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Dr. Gehan Abd-el-Rahman Ahmed Hamdy :: Publications:

Title:
Numerical Investigation of Strengthened Vaulted Masonry Structures
Authors: Gehan Hamdy; Osama Kamal; Mohamed O.R. Al-Hariri;Tarek El-Salakawy
Year: 2016
Keywords: Numerical Modelling; Nonlinear Analysis; Masonry; Strengthening
Journal: Euro-American Congress on Construction Pathology, Rehabilitation Technology and Heritage Management REHABEND 2016
Volume: Not Available
Issue: Not Available
Pages: Not Available
Publisher: Not Available
Local/International: International
Paper Link: Not Available
Full paper Gehan Abd-el-Rahman Ahmed Hamdy_18-2016-REHABEND2016-Numerical Investigation of Strengthened Vaulted Masonry Structures.pdf
Supplementary materials Not Available
Abstract:

Unreinforced masonry arches and vaults are frequent in historic structures worldwide. Many of these structures are subject to deterioration and damage and need strengthening to maintain their stability and preserve the historic value. For design of structural interventions for these structures, analysis is needed to realistically estimate the stresses and deformations after strengthening.The present paper addresses numerical modeling and nonlinear analysis of vaulted masonry vaults structures strengthened by different techniques. The numerical modeling by finite elements and the nonlinear analysis were carried out using commercial software ANSYS 12.0. The proposed model was applied to study the structural behavior of several brick masonry vaults strengthened by traditional techniques such as steel bars, ferro-cement and polymer mortar layers and also using externally bonded fiber-reinforced polymer (FRP) laminates; the analyzed vaults were previously tested in laboratory till failure. For all the studied vaults, the numerical results obtained using the proposed model were in good agreement with those obtained experimentally, which demonstrates the capability of the proposed modeling scheme to simulate efficiently the actual behavior of the strengthened vaults. Comparison of the different strengthening techniques regarding enhancement of the vaults capacity and stiffness showed that FRP overlays gave higher strengthening level where the failure load was double that of the unstrengthened vaults. The proposed modeling approach is thus considered a valid and practical tool for the design of strengthening interventions for contemporary or historic unreinforced masonry structures.

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