Extrados strengthening of brick masonry arches with PBO–FRCM composites: Experimental and analytical investigations

Alecci, Valerio; Focacci, Francesco; Rovero, Luisa; Stipo, Gianfranco; Stefano, Mario De

doi:10.1016/j.compstruct.2016.04.030

Cited by 101 publications

(61 citation statements)

References 37 publications

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“…In terms of collapse mechanism, the location and the opening sequence of the plastic hinges are in agreement with the experimental evidence as well. In order to calibrate the numerical model, an initial comparison was performed with the results of the experimental campaign reported in [26]. In the mentioned paper two identical arches were subjected to a vertical concentrated load according to the experimental layout reported in Figure 4.…”

Section: / 2 L R mentioning

confidence: 99%

“…In the mentioned paper two identical arches were subjected to a vertical concentrated load according to the experimental layout reported in Figure 4. The mechanical parameters of the masonry have been estimated by means of experimental tests [26], and are here reported in Table 1. E and G represent the normal and the tangential deformation moduli of masonry, σ t and σ c the tensile and compressive strengths, G t and G c the corresponding values of fracture energy, c the cohesion, µ the friction factor, and w the specific self-weight of masonry.…”

Section: / 2 L R mentioning

confidence: 99%

“…The basic geometry of the arch is characterized by the value R1 = 866 mm, which corresponds to a prototype tested in the laboratory, subjected to an unsymmetrical vertical static load [26]; then, two additional values of the radius (R2 = 1500 mm and R3 = 2500 mm) are considered in order to investigate the effect of the scale factor on the response of the unreinforced and reinforced systems.…”

Section: / 2 L R mentioning

confidence: 99%

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Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing

et al. 2017

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Abstract:A reliable numerical evaluation of the nonlinear behaviour of historical masonry structures, before and after a seismic retrofitting, is a fundamental issue in the design of the structural retrofitting. Many strengthening techniques have been introduced aimed at improving the structural performance of existing structures that, if properly designed and applied, provide an effective contribution to the preservation of their cultural value. Among these strategies, the use of fabric-reinforced polymeric (FRP) materials on masonry surface is being widely adopted for practical engineering purposes. The application of strips or 2D grid composite layers is a low invasive and easy to apply retrofitting strategy, that is able to improve both the in-plane and the out of plane behaviour of masonry elements also in the presence of complex geometries thanks to their flexibility. For this reason, these techniques are frequently employed for reinforcing masonry curved elements, such as arches and vaults. In this paper, taking advantage of an existing general framework based on a discrete element approach previously introduced by the authors, a discrete element conceived for modelling the interaction between masonry and FRP reinforcement is applied to different curved masonry vaults typologies. This model, already used for evaluating the nonlinear behaviour of masonry arches, is here employed for the first time to evaluate the effectiveness of FRP reinforcements on double curvature elements. After a theoretical description of the proposed strategy, two applications relative to an arch and a dome, subjected to seismic loads, with different reinforced conditions, are presented. The benefit provided by the application of FRP strips is also compared with that associated to traditional retrofitting techniques. A sensitivity study is performed with respect to the structure scale factor.

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Section: / 2 L R mentioning

confidence: 99%

Section: / 2 L R mentioning

confidence: 99%

Section: / 2 L R mentioning

confidence: 99%

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Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing

et al. 2017

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“…The ULS limit state is achieved for the value of PGA that determines the collapse of the structure while the DLS state is achieved for the maximum interstorey drift [13].…”

Section: Fragility Curvesmentioning

confidence: 99%

“…The building characterization [9,10] has great relevance, in particular, to the seismic vulnerability assessment [11], in which non-structural elements also play a relevant role [12][13][14]. According to previous experiences on the monitoring and rehabilitation of existing buildings [4,[15][16][17] it is possible to notice significant uncertainties in the mechanical properties of both concrete and steel bars.…”

Section: Introductionmentioning

confidence: 99%

Effect of Material Variability and Mechanical Eccentricity on the Seismic Vulnerability Assessment of Reinforced Concrete Buildings

et al. 2017

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Abstract:The present paper deals with the influence of material variability on the seismic vulnerability assessment of reinforced concrete buildings. Existing r.c. buildings are affected by a strong dispersion of material strengths of both the base materials. This influences the seismic response in linear and nonlinear static analysis. For this reason, it is useful to define a geometrical parameter called "material eccentricity". As a reference model, an analysis of a two storey building is presented with a symmetrical plan but asymmetrical material distribution. Furthermore, an analysis of two real buildings with a similar issue is performed. Experimental data generate random material distributions to carry out a probabilistic analysis. By rotating the vector that defines the position of the center of strength it is possible to describe a strength domain that is characterized by equipotential lines in terms of the Risk Index. Material eccentricity is related to the Ultimate Shear of non-linear static analyses. This relevant uncertainty, referred to as the variation of the center of strength, is not considered in the current European and Italian Standards. The "material eccentricity" therefore reveals itself to be a relevant parameter to considering how material variability affects such a variation.

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Analytical Modelling of the Tensile Response of PBO-FRCM Composites

Focacci

D’Antino

Carloni

2020

Lecture Notes in Mechanical Engineering

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Extrados strengthening of brick masonry arches with PBO–FRCM composites: Experimental and analytical investigations

Cited by 101 publications

References 37 publications

Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing

Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing

Effect of Material Variability and Mechanical Eccentricity on the Seismic Vulnerability Assessment of Reinforced Concrete Buildings

Analytical Modelling of the Tensile Response of PBO-FRCM Composites

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