Experimental shear testing of timber-masonry dry connections for the seismic retrofit of unreinforced masonry shear walls

Riccadonna, Daniele; Giongo, Ivan; Schiro, Gianni; Rizzi, Ermes; Parisi, Maria Adelaide Vittoria

doi:10.1016/j.conbuildmat.2019.03.145

Cited by 31 publications

(32 citation statements)

References 11 publications

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“…Several studies have been conducted to analyze the recentering and dissipative characteristics of structures made with this technology (Akbas et al, 2017;Ganey et al, 2017;Hashemi et al, 2020). As well as the dissipative effects due to the insertion of rocking elements inside existing structures to be entrusted with the migration of damage (Pilon et al, 2019;Sandoli et al, 2020;, or due to the presence of metal connections for reinforcement interventions in its plane with CLT panels (Longarini et al, 2018) or off-plan (Riccadonna et al, 2019). In general, numerous research groups are investigating the effects of reinforcement systems based on the use of panels for exoskeletons or endoskeletons on existing masonry buildings (Salgado et al, 2021;Sustersic et al, 2014).…”

Section: Parasite Architecture: Structural Aspectsmentioning

confidence: 99%

A sustainable material for sustainable architecture: wood in parasite architecture

Rinaldi¹,

Frunzio²,

Guadagnuolo³

et al. 2021

Congresso Internacional Sobre Patologia E Reabilitação Das Construções

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The pandemic Covid-19 has distorted the way of living and enjoying the spaces. Unfortunately, cities are often saturated and many of the public buildings fail to meet the new needs. The need to expand the spaces is a problem and an opportunity: intervening on the existing patrimony, however, requires a multidisciplinary commitment. The interventions on the built heritage have several problems, on the one hand technological, aimed at improving the energy impact of the new building, and on the other properly structural, because the existing heritage was not always built with seismic requirements. This article presents some possible solutions for intervention on the existing patrimony for the implementation of the spaces through volumetric addition, "parasitic architecture", and how the use of wood and its derivatives can allow it.

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Section: Parasite Architecture: Structural Aspectsmentioning

confidence: 99%

A sustainable material for sustainable architecture: wood in parasite architecture

Rinaldi¹,

Frunzio²,

Guadagnuolo³

et al. 2021

Congresso Internacional Sobre Patologia E Reabilitação Das Construções

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“…However, the availability of these unique connections in the open market is a concern limiting the applicability of the techniques. In addition, more recent research [10][11][12] explores the use of timber panels to retrofit masonry walls. Among them, experimental studies have been developed to evaluate the application of laminated veneer lumber (LVL) and CLT timber panels connected to masonry walls with screw anchor fasteners [10].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, more recent research [10][11][12] explores the use of timber panels to retrofit masonry walls. Among them, experimental studies have been developed to evaluate the application of laminated veneer lumber (LVL) and CLT timber panels connected to masonry walls with screw anchor fasteners [10]. The study concludes that the proposed timber retrofit approach increases both the capacity and the stiffness of the retrofitted walls.…”

Section: Introductionmentioning

confidence: 99%

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Retrofitting Masonry Walls against Out-Of-Plane Loading with Timber Based Panels

Iuorio

Dauda

2021

Applied Sciences

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Unreinforced masonry walls are prone to failure when subjected to out-of-plane loading. This is due to their low performance in bending, and often the lack of appropriate connection to returning walls and floors. This paper investigates the possibility to use oriented strand boards (OSB) panels to improve the out-of-plane performance of brick masonry walls. The proposed technique considers securing OSB type-3 panels behind masonry walls with chemical and mechanical connections. The work presents finite element models to predict their behaviour. The models have been calibrated and validated through a three-phase experimental campaign, aimed at (a) characterizing the main structural components, (b) studying the out-of-plane behaviour of small-scale masonry prisms and (c) studying the behaviour of 1115 × 1115 × 215 mm masonry walls. The finite element models developed are based on a micromodel technique developed in ABAQUS and demonstrated to adequately capture the behaviour of both plain and retrofitted models to the ultimate load. The models also show an excellent correlation of the compressive damage and tensile damage with the experimental failure pattern. Generally, the model predicted the peak load and the corresponding failure and toughness to within less than 10% of the average test results.

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“…A detailed description of this retrofit solution and the outcomes of numerical simulations were provided by Giongo et al [1] while the effectiveness of this retrofit technique was experimentally investigated by Giongo et al [2] via onsite testing of masonry shear walls strengthened with timber panels. Further experimental evidence on walls retrofitted with timber panels and timber-to-masonry connections can be found in Borri et al [3], Pozza et al [4], Riccadonna et al [5] and Rizzi et al [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study on Seismic Retrofit of Urm Walls Using Timber Panels

Cassol¹,

Giongo²,

Piazza³

2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Unreinforced masonry (URM) buildings are characterized by high vulnerability to lateral loading, which is often manifested when an earthquake occurs. The present study investigates the effectiveness of a timber-based retrofit solution aimed at reducing the seismic vulnerability of existing URM structures. The retrofit technique consists of connecting timber-based panels, to the interior surface of the walls of a building using mechanical or adhesive pointto-point connections. The application of those panels allows to considerably increase both the in-plane and the out-of-plane capacity of the URM walls, while preserving the original external facades of the retrofitted building. This solution resulted to be relatively fast and easy to install and the reversible nature of the system allows to reduce the impact of the retrofit intervention. In this work the in-plane behaviour of the retrofitted walls was investigated numerically, building on previous preliminary analyses and in the lights of the results of experimental evidence collected by the authors' research team. The effectiveness of this retrofit solution was analysed on several masonry types, considering different masonry properties and geometries. The influence of various parameters (such as masonry-to panel connection typology, connectors number and position) on the increase of lateral capacity of the retrofitted walls was studied by means of a series of non-linear quasi-static simulations.

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Experimental shear testing of timber-masonry dry connections for the seismic retrofit of unreinforced masonry shear walls

Cited by 31 publications

References 11 publications

A sustainable material for sustainable architecture: wood in parasite architecture

A sustainable material for sustainable architecture: wood in parasite architecture

Retrofitting Masonry Walls against Out-Of-Plane Loading with Timber Based Panels

Numerical Study on Seismic Retrofit of Urm Walls Using Timber Panels

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