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Deterioration of the granitic stone at Misericórdia chapel in Murça (northern P...
Alves, Carlos; Vasconcelos, Graça; Fernandes, F. M.; Silva, Sandra MonteiroIn this work are considered the main deterioration processes of the granitic stone at the Misericórdia chapel of Murça (Vila Real). In the main façade and indoors there are erosive features (that can endanger decorative elements) and salt efflorescences with distributions that suggested the influence of capillary rising solutions, hypothesis supported by studies with ground penetrating radar and thermography. T...
Seismic-V : vernacular seismic culture in Portugal
Correia, M.; Carlos, G.; Rocha, S.; Lourenço, Paulo B.; Vasconcelos, Graça; Varum, HumbertoFor a long time, reactive seismic retrofitting was focused on monumental heritage and very little on vernacular architecture. In the last years, there has been a growing interest on seismic resistant design and solutions and several research units emerged to produce important research in the scientific field. However, for some time, international focus to address earthquake-damaged buildings was on intrusive te...
Architectural heritage of the north eastern Portugal : history, construction an...
Martins, Lurdes; Vasconcelos, Graça; Lourenço, Paulo B.This article is based on a study carried out in different small houses located along the margins of the Tua River, in the county of Alijó and Carrazeda de Ansiães, in order to perform a characterization of constructive techniques and materials. It is considered as a constant goal throughout this study the appreciation of natural stone, in this case granite and schist, as construction materials that were used in...
Use of textile fibres in the reinforcement of a gypsum-cork based composite mat...
Vasconcelos, Graça; Camões, Aires; Fangueiro, Raúl; Vila-Chã, Nuno; Jesus, Carlos M. G.; Cunha, Fernando Eduardo MacedoThe study presented herein focus on the analysis of a series of experimental tests aiming at characterizing the performance of distinct textile fibers acting as a reinforcement of a gypsum-cork composite material. Two groups of textile fibers were selected, namely synthetic fibers (glass and basalt) and natural fibers (banana and sisal). The reinforced composite material was submitted to distinct types of loadi...
Modern masonry structures and earthquakes : reinforced or unreinforced?
Lourenço, Paulo B.; Vasconcelos, GraçaThe evolution of structural masonry is briefly reviewed, from old thrust line behavior to modern global behavior using shear walls. For modern structural masonry, the use of unreinforced, confined and reinforced masonry is addressed in seismic areas. A first focus is given to recent approaches towards the safety assessment of unreinforced masonry buildings and their performance in shaking table tests. Subsequen...
Development and experimental validation of building systems for masonry housing...
Lourenço, Paulo B.; Vasconcelos, Graça; Avila, LeonardoThe evolution of structural masonry is briefly reviewed, from old thrust line behavior to modern global behavior using shear walls. For modern structural masonry, the use of unreinforced, confined and reinforced masonry is addressed in seismic areas. A first focus is given to recent approaches towards the safety assessment of unreinforced masonry buildings and their performance in shaking table tests. Subsequen...
An overview on the seismic behaviour of timber frame structures
Vasconcelos, Graça; Lourenço, Paulo B.; Poletti, ElisaTraditional timber frame walls are an important structural element of many buildings and are usually composed of vertical posts and horizontal beams with bracing diagonal elements. In Portugal the timber frame walls, known as frontal walls, are usually part of Pombalino buildings, which were introduced by the Marquis of Pombal, who was responsible for the reconstruction of Downtown Lisbon after the great earthq...
Seismic performance of traditional half-timbered walls : experimental results
Poletti, Elisa; Vasconcelos, GraçaHalf-timbered structures constitute an important cultural heritage of many countries, since they represent a typical anti-seismic construction adopted worldwide [1][2]; therefore, their preservation is of the utmost importance. Although recent earthquakes have pointed out the good seismic behaviour of this kind of structures, few experimental studies are available on the performance of traditional half-timbered...
Influence of infill on the cyclic behaviour of traditional half-timbered walls
Poletti, Elisa; Vasconcelos, Graça; Oliveira, Daniel V.Half-timbered buildings represent an important historical heritage in many countries. They are diffused in various regions for different reasons, such as availability of materials, to lighten a structure, low cost and the strength they offer, and as a construction element able to resist seismic actions. This latter issue is the research topic analysed here, as half-timbered buildings have been specifically used...
Flexural behaviour of brick masonry retrofitted with braided textile meshes
Vasconcelos, Graça; Mora, Juan; Fangueiro, Raúl; Cunha, Fernando Eduardo Macedo; Martins, AndreiaThe vulnerability of unreinforced masonry walls (URM) under seismic events, causing huge loss of money and human lives, has revealed the enormous need for an efficient strengthening material. In this context, the present paper reports the development of a new reinforcing material for masonry walls based on braided fibrous structures. These fibrous materials were developed through braiding of polyester yarns aro...
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