A detailed micro-modelling approach for the diagonal compression test of strengthened stone masonry walls

Ghiga, DA; Ţăranu, Nicolae; Ungureanu, Dragoş; Isopescu, Dorina Nicolina; Oprişan, Gabriel; Hudisteanu, I

doi:10.1088/1757-899x/916/1/012041

Cited by 5 publications

(3 citation statements)

References 8 publications

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“…The replacement of degraded stones in existing historic constructions is a deep-rooted practice in restoration work. Regardless of whether a strengthening system is to be applied or not, the masonry substrate should first be prepared and repaired to meet its initial constructive and appearance features [ 5 , 6 , 7 ]. In Europe, an ample debate has been held for decades on the priority and significance of the selection criteria for the materials used in restoration work [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Sourcing Limestone Masonry for the Restoration of Heritage Buildings: Frumoasa Monastery Case Study

et al. 2022

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Cultural and religious heritage assessments and restorations are considered to be a fundamental requirement of any modern society because these constructions represent one of the most meaningful and tangible connections to our past. With rare exceptions, heritage buildings were built with materials and systems that could bear gravitational loads but not bending and shearing resulting from seismic loading. Thus, in many cases, earthquake ground motions have led to severe degradation and even the collapse of various parts of these structural systems. In order to address these issues, repair and replacement techniques are applied as common parts of restoration work. In the peculiar case of stone masonry structures, a standalone macroscopic examination is not self-assured and, most often, can lead to an inadequate selection of a replacement material. Therefore, a knowledge of mesoscopic, petrographic, physical and mechanical properties is compulsory in the design, planning and execution of restoration work. From this perspective, the present research has taken, as a case of study, the Frumoasa monastic complex from Iași, Romania, introducing microscopic, XRF (X-ray fluorescence) spectroscopy and petrographically based approaches, comparing three limestone samples with a sample dislodged from the original wall. The physical properties (bulk and real densities, open porosity and capillary water absorption coefficient) and the mechanical properties (compressive and tensile strengths) were also experimentally determined. The samples were extracted from stone quarries located on the territories that were part of the same historical region as the Frumoasa monastic complex. Based on the outcomes of this study, suitable criteria for the stone replacement—consisting of identifying the main structure, quarry rock petrographical parameters and physical and mechanical characteristics—were determined and applied.

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Section: Introductionmentioning

confidence: 99%

Sourcing Limestone Masonry for the Restoration of Heritage Buildings: Frumoasa Monastery Case Study

et al. 2022

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“…Stone masonry is one of the oldest and widely used structural system for civil buildings and historical constructions. Despite the convenient durability characteristics of the material (stone), the overall structural system is characterized by high seismic vulnerability, which frequently caused significant loss of life during recent earthquakes [1,2]. The main reason of the poor structural behaviour of stone masonry constructions under seismic loading lies in the combination of low tensile strength and heavy inertia masses, features that can induce sudden and brittle failure modes.…”

Section: Introductionmentioning

confidence: 99%

Shear Structural Response of a Prototype Strengthening System Designed for Stone Masonry Panels

Spiridon¹,

Isopescu²,

Ungureanu³

et al. 2022

IJMMT

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This paper presents the set-up needed for an experimental study regarding the in-plane shear behaviour of stone masonry panels, strengthened with a prototype hemp reinforced mortar. Seven stone masonry panels will be designed and manufactured for this purpose: one unreinforced, three plastered on both sides and three plastered on a single side. The aim of this experimental study is to evaluate the effectiveness of the prototype hemp reinforced mortar in enhancing the shear strength and the displacement capacity of the stone masonry walls. In addition, the design and the manufacturing stages of the prototype hemp reinforced mortar have been carefully described, thus allowing an easy application of this TRM system on a large scale. Crucial aspects regarding the shear behaviour of stone masonry unstrengthen/strengthened walls, such as the quantification of the ultimate forces and displacements, the description of the dominant failure modes, and the characterization of the stress-strain state may be analysed by performing the envisaged experimental study based on the proposed set up.

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“…Compared to the traditional methods used for strengthening, the techniques based on FRP composite materials have remarkable advantages that arise from their superior mechanical characteristics and corrosion resistance properties [7][8][9][10]. The structural efficiency of these methods was analyzed by various research teams by conducting experimental programs based on numerical analysis methods and by adjusting and applying the existent theoretical models specific to the hybrid consolidation solutions [11][12][13][14]. However, the progress in this research area has been achieved mainly through the relatively recent development of FRP composite products that are structurally compatible with steel elements.…”

Section: Introductionmentioning

confidence: 99%

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

et al. 2021

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This paper presents the outcomes of an experimental and numerical study performed on epoxy-bonded single lap joints (SLJs) between carbon fiber-reinforced polymer (CFRP) composite strips and steel elements. For the experimental program, 34 specimens were prepared by varying the type of the composite strip and the type of adhesives and their thicknesses; all specimens were loaded in axial tension up to failure. The specific failure mechanisms were identified and commented on the basis of the performed tests, and the load–displacement curves were plotted. Additionally, the strain distributions along the bond lengths at different load stages, the shear stress–displacements (slip) variations and the stress–strain distributions for the CFRP strips were plotted and investigated. The numerical simulations, based on 3D finite element method (FEM) analysis, provided consistent results, in good agreement with the experimental ones for all parameters that were investigated and discussed in this paper.

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A detailed micro-modelling approach for the diagonal compression test of strengthened stone masonry walls

Cited by 5 publications

References 8 publications

Sourcing Limestone Masonry for the Restoration of Heritage Buildings: Frumoasa Monastery Case Study

Sourcing Limestone Masonry for the Restoration of Heritage Buildings: Frumoasa Monastery Case Study

Shear Structural Response of a Prototype Strengthening System Designed for Stone Masonry Panels

Structural Response of Bonded Joints between FRP Composite Strips and Steel Plates

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