Nested Buildings: An Innovative Strategy for the Integrated Seismic and Energy Retrofit of Existing Masonry Buildings with CLT Panels
Open Access
- 23 January 2021
- journal article
- research article
- Published by MDPI AG in Sustainability
- Vol. 13 (3), 1188
- https://doi.org/10.3390/su13031188
Abstract
The Italian building heritage is aged and inadequate to the high-performance levels required nowadays in terms of energy efficiency and seismic response. Innovative techniques are generating a strong interest, especially in terms of multi-level approaches and solution optimizations. Among these, Nested Buildings, an integrated intervention approach which preserves the external existing structure and provides a new structural system inside, aim at improving both energy and structural performances. The research presented hereinafter focuses on the strengthening of unreinforced masonry (URM) buildings with cross-laminated timber (CLT) panels, thanks to their lightweight, high stiffness, and good hygrothermal characteristics. The improvement of the hygrothermal performance was investigated through a 2D-model analyzed in the dynamic regime, which showed a general decreasing in the overall thermal transmittance for the retrofitted configurations. Then, to evaluate the seismic behavior of the coupled system, a parametric linear static analysis was implemented for both in-plane and out-of-plane directions, considering various masonry types and connector spacings. Results showed the efficiency of the intervention to improve the in-plane response of walls, thus validating possible applications to existing URM buildings, where local overturning mechanisms are prevented by either sufficient construction details or specific solutions.This publication has 46 references indexed in Scilit:
- Performance of masonry buildings during the Emilia 2012 earthquakeBulletin of Earthquake Engineering, 2013
- Analysis and repair of clustered buildings: Case study of a block in the historic city centre of L’Aquila (Central Italy)Construction and Building Materials, 2013
- Experimental investigations on masonry structures using external prestressing techniques for improving seismic performanceEngineering Structures, 2012
- Structural Aspects of The Conservation of Historic Masonry Constructions in Seismic Areas: Remedial Measures and Emergency ActionsInternational Journal of Architectural Heritage, 2011
- Influence of the internal inertia of the building envelope on summertime comfort in buildings with high internal heat loadsEnergy and Buildings, 2011
- Assessment and analysis of damage in L’Aquila historic city centre after 6th April 2009Bulletin of Earthquake Engineering, 2010
- Flexural strengthening of timber beams by traditional and innovative techniquesJournal of Building Appraisal, 2007
- Interior Insulation Retrofits of Load-Bearing Masonry Walls in Cold ClimatesJournal of Green Building, 2007
- The Athens earthquake (7 September 1999): intensity distribution and controlling factorsEngineering Geology, 2001
- Climate analysis based on the psychrometric chartInternational Journal of Ambient Energy, 1986