Seismic Strengthening and Energy Efficiency: Towards an Integrated Approach for the Rehabilitation of Existing RC Buildings

Manfredi, Vincenzo; Masi, Angelo

doi:10.3390/buildings8030036

Cited by 52 publications

(47 citation statements)

References 39 publications

(37 reference statements)

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“…The same strategy suggested by Feroldi et al has been previously investigated by Manfredi and Masi [17], who also alternatively proposed to replace the external layer of the as-built infill walls with a new panel with better thermal insulation properties (20 cm-thick cored bricks). However, they used a simplified numerical model to take into account the structural contribution of infill walls; in particular, infills are simulated by diagonal strut model and reducing the infill strength and stiffness properties through the Decanini et al expression [18], in order to consider the presence of openings.…”

Section: The State Of Art Of Combined Renovation Interventionsmentioning

confidence: 95%

“…In the recent past, some researches suggesting an integrated approach to building renovation has been published. Some of them [16,17] proposed to create a double-skin façade to improve both seismic and energy performance. Among all possible global interventions, external interventions are very promising.…”

Section: The State Of Art Of Combined Renovation Interventionsmentioning

confidence: 99%

“…These interventions do not necessarily require the relocation of the inhabitants during the works; the appropriate use of dampers allows concentrating the damage into limited zone and reducing the repair costs after an earthquake to the substitution of a few elements. In both the aforementioned papers [16,17], an exoskeleton was investigated: the authors proposed a tridimensional addition to the façade of the existing structure able to improve energy performance and structural safety. Furthermore, it also allows an improvement of the architectural image of the building.…”

Section: The State Of Art Of Combined Renovation Interventionsmentioning

confidence: 99%

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Seismic and Energy Retrofit of Apartment Buildings through Autoclaved Aerated Concrete (AAC) Blocks Infill Walls

Artino¹,

Evola

Margani

et al. 2019

Sustainability

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All around the world, a huge amount of buildings have been built before the enforcement of specific codes for seismic resistance and energy efficiency. Particularly in Italy, over 74% of residential buildings were constructed before 1980, when only 25% of the territory was classified as seismic, and nearly 86% were built before 1991, when the first restrictive regulation on energy efficiency was issued. This means that most buildings need both seismic and energy renovation actions to improve their sustainability level. The proposed combined retrofit strategy for reinforced concrete framed buildings is based on the replacement of the external layer of double-leaf infill walls, made of hollow bricks, with high-performing AAC blocks: this solution can be implemented by operating mainly from the outside of the building, thus reducing occupants’ disruption during retrofitting. The generally neglected structural contribution of masonry infill panels is here considered using a recently developed macro-element modeling approach. The results suggest that, from a structural viewpoint, the proposed intervention involves the highest improvement at the damage limitation limit state, while lower upgrades are recorded at life safety limit state and near-collapse limit state. In regards to the energy issues, the energy demand can be reduced by 10% and 4% for heating and cooling, respectively, just by replacing the outer layer of blocks; further savings can be achieved through the application of a supplementary insulation layer.

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Section: The State Of Art Of Combined Renovation Interventionsmentioning

confidence: 95%

Section: The State Of Art Of Combined Renovation Interventionsmentioning

confidence: 99%

Section: The State Of Art Of Combined Renovation Interventionsmentioning

confidence: 99%

See 1 more Smart Citation

Seismic and Energy Retrofit of Apartment Buildings through Autoclaved Aerated Concrete (AAC) Blocks Infill Walls

Artino¹,

Evola

Margani

et al. 2019

Sustainability

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“…Due to these aspects, the upgrading system is made of RC frames located along the perimeter of the existing structure [15,16] and rigidly connected to it (Figure 9). This intervention strategy comprises works to be carried out only from the outside with a strong reduction of demolitions and related reconstruction works.…”

Section: Design Of Seismic Interventionmentioning

confidence: 99%

Post-Earthquake Rehabilitation of Healthcare Buildings: The Case Study of the Mirandola Hospital

Ventura¹,

Santarsiero²,

Masi³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Recent earthquakes in Italy and other countries have shown the fragility of hospital complexes which resulted in many cases unusable due to structural and non-structural damage. Depending on the extent of damage, unusable hospitals were reopened after some weeks/months, or affected by long rehabilitation intervention or demolished. In order to allow for a prompt resumption of the social activities of the local communities, the usability evaluation carried out in the immediate aftermath of a seismic event is a crucial step to address the short-term countermeasures and to obtain a gross estimate of the economic losses. After the first weeks, it is often necessary a more detailed assessment which allows for a more accurate evaluation of damage and, more importantly, about the reparability of the structure along with the study of feasible intervention strategies. This latter activity needs detailed analyses based on increased knowledge of the structure. Keeping in mind the objectives of detailed postearthquake assessment and reparability evaluations, the Santa Maria Bianca hospital of Mirandola, damaged by the Emilia 2012 earthquake, has been analyzed as a case study. Analyses were devoted to defining an upgrading strategy to match the code serviceability limit states (damage limitation and occupancy). The selected strategy included solutions to carry out most of the work from outside, to limit the downtime of the building as well as reconstruction of demolished non-structural elements. Further analyses were made in order to check the effects of the upgrading strategy under the seismic actions recorded during the 2012 Emilia earthquake. These analyses highlighted that even the upgraded hospital building could not be able to remain operational after a new seismic event having the same intensity as the 2012 event, underlining the need of more stringent design criteria for strategic structures like hospitals that are requested to provide healthcare services even more when strong earthquakes occur.

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“…Specifically, an intervention carried out by replacing the existing masonry infill walls with new elements able to ensure an adequate thermal insulation is considered. Furthermore, the improvement in both seismic and thermal performances through the so-called "double skin" [8,9] intervention technique, that is, by adding new infilled frames adequately linked to the existing ones, is analyzed.…”

Section: Introductionmentioning

confidence: 99%

Energy and Seismic Rehabilitation of RC Buildings through an Integrated Approach: An Application Case Study

D’Angola¹,

Manfredi²,

Masi³

et al. 2019

Green Energy Advances

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The high number of existing buildings in Italy without adequate seismic and thermal performances requires the definition of integrated retrofitting techniques in order to improve the seismic performance and to reduce energy losses at the same time. On one hand, an integrated approach appears mandatory considering that improving only the energy efficiency of nonseismic buildings leads to an increase of their exposure and, therefore, of their risk in the case of seismic events. On the other hand, seismic strengthening without an adequate thermal assessment and rehabilitation could compromise living comfort and energy maintenance costs. In this context, an application of integrated approach for the rehabilitation of reinforced concrete (RC) existing buildings has been proposed referring to a case study representative of the Italian building stock. Different configurations of infill panels have been considered in order to analyze both energy and seismic performance. Monthly quasi-steady state and hourly dynamic models have been used for the calculation of the energy need of buildings located in different Italian climate and seismic zones. Seismic performances have been evaluated by means of incremental nonlinear dynamic analysis (IDA). As-built and post-retrofit performances have been compared in order to evaluate the effectiveness of the proposed intervention solutions.

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Seismic Strengthening and Energy Efficiency: Towards an Integrated Approach for the Rehabilitation of Existing RC Buildings

Cited by 52 publications

References 39 publications

Seismic and Energy Retrofit of Apartment Buildings through Autoclaved Aerated Concrete (AAC) Blocks Infill Walls

Seismic and Energy Retrofit of Apartment Buildings through Autoclaved Aerated Concrete (AAC) Blocks Infill Walls

Post-Earthquake Rehabilitation of Healthcare Buildings: The Case Study of the Mirandola Hospital

Energy and Seismic Rehabilitation of RC Buildings through an Integrated Approach: An Application Case Study

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