Structural and thermal retrofitting of masonry walls: An integrated cost-analysis approach for the Italian context

Mistretta, Fausto; Stochino, Flavio; Sassu, Mauro

doi:10.1016/j.buildenv.2019.03.033

Cited by 38 publications

(30 citation statements)

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“…Further development of this work is expected, applying this method to existing structures, like those described in [50,51]. It is also interesting to merge the proposed method with other assessment approaches and retrofitting techniques considering other kind of structures [52][53][54].…”

Section: Discussionmentioning

confidence: 97%

Fragility Curves for RC Structure under Blast Load Considering the Influence of Seismic Demand

2020

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The complex characteristics of explosion load as well as its increasingly high frequency in the civil environment highlight the need to develop models representing the behavior of structures under blast load. This work presents a probabilistic study of the performance of framed reinforced concrete buildings designed according to the current Italian NTC18 and European EC8 technical standards. First, a simplified single degree of freedom model representing the structural system under blast load has been developed. Then, a probabilistic approach based on Monte Carlo simulation analysis highlighted the influence of seismic demand on the behavior of Reinforced Concrete RC buildings subjected to blast load.

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Section: Discussionmentioning

confidence: 97%

Fragility Curves for RC Structure under Blast Load Considering the Influence of Seismic Demand

2020

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“…t is worthy to evaluate the role of a retrofitting solution that could have impeded the wall collapse [34,35]. A traditional but effective technique is adopted: a steel tie-rod installed at a certain depth in the sandy soil beyond the artificially added soil (Fig.…”

Section: Analysis Of a Retrofitted Statementioning

confidence: 99%

Estimation of tensile mechanical parameters of existing masonry through the analysis of the collapse of Volterra’s urban walls

Puppio

Giresini²

2019

Frattura Ed Integrità Strutturale

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In this work, numerical analyses on the Volterra's ancient walls are performed to understand the causes of a collapse occurred after an extreme rainfall (2014) and to identify the mechanical parameters that most influenced it. The stretch of collapsed wall is modelled with finite elements by distinguishing the material composing the multi-leaf wall. Non-linear static analyses are carried out with the DIANA software considering different levels of hydraulic head up to reach the collapse of the structure. The impact on the failure modes of the involved parameters, such as tensile strength, fracture energy and shear strength, are discussed. Tensile strength is found as the most relevant parameter in the failure mode. Finally, a 3-dim model is presented, and the results show a very good agreement with the failure mode actually occurred in terms of both failure modes and displacement fields. The safety evaluation is performed in the as-built and the retrofitted configuration, consisting in the wall restrained by tie-rods. The results show a significant increasing of the safety level of the retrofitted configuration showing a considerable improvement not only in terms of limit equilibrium but also in terms of structural capacity of the wall.

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“…Although insulating from the exterior side would provide optimum performance and would ensure the integrity of the masonry walls, in the case of historic stone buildings, the addition of new insulation is generally restricted to the interior side of the building for aesthetic reasons [14]. Nevertheless, stone masonry was introduced in [27,28] and applies the procedure to an existing masonry building discussing the different implications of each assumption. It also gives practical recommendations on how to evaluate the level of improvement in an integrated way.…”

Section: Introductionmentioning

confidence: 99%

“…Definition of dimensionless parameters c U and c R , defined in [28], to identify the demand for thermal and seismic performances respectively, with the expressions:…”

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Integrated cost-analysis approach for seismic and thermal improvement of masonry building façades

Giresini

Paone

Sassu

2020

IJEIE

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The combination of structural and thermal efficiency is a new frontier in civil engineering. Indeed, the retrofitting strategies should optimize costs and technical solutions from these two points of view. If a technical solution is able to provide an improvement of both structural and energetic behavior, then the utility of the intervention can better justify the economic investment. In this paper, a meso-scale approach (i.e., façade-scale) for integrated interventions applied on masonry façades is proposed. The structural performance of the façade is evaluated by considering base shear and ductility of the structural element through non-linear static analyses. Moreover, the thermal indicator, that is the thermal transmittance, is computed with a simplified approach in terms of an equivalent wall, taking into account the role of the windows and doors of the façade. As proof of concept, the procedure is applied to a façade of an existing masonry building. Economic and environmental iso-cost curves are obtained to tune the interventions conceived for a real case study, analyzing the benefit offered by different retrofitting solutions.

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Structural and thermal retrofitting of masonry walls: An integrated cost-analysis approach for the Italian context

Cited by 38 publications

References 50 publications

Fragility Curves for RC Structure under Blast Load Considering the Influence of Seismic Demand

Fragility Curves for RC Structure under Blast Load Considering the Influence of Seismic Demand

Estimation of tensile mechanical parameters of existing masonry through the analysis of the collapse of Volterra’s urban walls

Integrated cost-analysis approach for seismic and thermal improvement of masonry building façades

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