Thermal and Seismic Capacity Improvements for Masonry Building Heritage: A Unified Retrofitting System

Fabio Longo,Alessio Cascardi,Paola Lassandro,Maria Antonietta Aiello

doi:10.3390/su13031111

Abstract

Today, the attention in the retrofitting of building is quickly growing. In this field, the re-use of waste materials and the innovation in the retrofitting techniques are among the crucial topics. Generally, thermal capacity and seismic resistance are two aspects very felt by the building owners. Commonly, independent approaches are assessed in order to cover the energy and mechanical lacks of a building. In such a way, the intervention may result time- and cost-consuming or, sometimes, poorly effective. The present paper aimed to propose and validate a new retrofitting system based on the partial use of waste materials, such as fly ash and expanded glass (acting as a matrix), and a fiber open grid reinforcement. The proposal is suitable for the plastering of building with the double scope of thermal insulation and seismic strengthening throughout a unique application. An experimental investigation was carried out considering small-scaled masonry panels with double-side retrofitting. The studied parameters were thermal transmittance and shear strength. The results evidenced the effectiveness of the proposed technique, able to significantly improve the un-retrofitted masonry, from both the thermal and mechanical point of view.

Highlights

Fiber Reinforced Plastic (FRP) were largely used in strengthening of structural members, such as column, floor, wall, beam, arch, vault, or even the entire building [1,2,3,4,5,6,7,8], as External Bonded Reinforcement (EBR), where the polymeric resin is responsible of the adhesion between the composite and the existing substrate
Clay brick masonry were delivered in Reference
[9] throughout an “artificial neural networks”-based methodpanels w and reinforced; thermal conductivity test and diagonal compressive elaboration constructed of existing data

Summary

Introduction

While the fibers guarantee relevant strength and stiffness in the reinforcement direction, self-weight of the composite is negligible. Due to these characteristics, FRPs were largely used in strengthening of structural members, such as column, floor, wall, beam, arch, vault, or even the entire building [1,2,3,4,5,6,7,8], as External Bonded Reinforcement (EBR), where the polymeric resin is responsible of the adhesion between the composite and the existing substrate. Matrix Composite (IMC) systems, such as FRCM and Composite Reinforced Mortar (CRM),stress-str behavior respectworks a traditional when the same fabric was considered. Reinforced mortar coating used forsimulations retrofitting panels of different masonry in order toFurthermore, demonstrate different the effectiveness the considered new systemforinthe case of masonry w types and thickness.

Methods

Results

Conclusion