Encontrados 88 documentos, a visualizar página 1 de 9
The vernacular house between the Cávado and the Ave, Portugal
Barroso, Carlos Eduardo Santos; Oliveira, Daniel V.; Ramos, Luís F.; Lourenço, Paulo B.Publicado em "Vernacular heritage and earthen architecture : contributions for sustainable development", ISBN 978-1-138-00083-4 ; With acknowledged authenticity and cultural heritage value, rural vernacular construction of Entre-Douro-e-Minho represents the results of the centuries-old relation between men and available natural resources. Abandoned or victim of armful interventions, this unique heritage acquir...
Limit analysis of loaded out-of-plane rubble masonry : a case study in Portugal
Milani, G.; Esquivel Fernández, Yhosimi Washington; Lourenço, Paulo B.; Riveiro, Belén; Oliveira, Daniel V.An integrated methodology for the characterization of the response of rubble masonry is presented. The behaviour at collapse of a wall belonging to the Guimarães castle (Portugal) is investigated through a rigid-plastic homogenization procedure, accounting both for the actual disposition of the blocks constituting the walls and texture irregularity, given by the variability of block dimensions. A detailed ...
In-plane behavior of tuff masonry panels strengthened with FRP diagonal layout
Marcari, Giancarlo; Oliveira, Daniel V.; Fabbrocino, G.; Lourenço, Paulo B.The present paper deals with a quantitative analysis of the shear strength behavior of masonry panels strengthened with diagonal layout. The objective of the study is to progress towards understanding the shear strength contributions from masonry and FRP to the lateral resistance of strengthened panels. To this aim, relevant experimental results of monotonic shear-compression tests are analyzed. The local behav...
Assessment of the bond quality degradation in FRP-strengthened masonry using IR...
Ghiassi, Bahman; Silva, Sandra Monteiro; Oliveira, Daniel V.; Lourenço, Paulo B.; Bragança, L.The FRP-to-masonry bond behavior in externally bonded reinforced masonry structures is the main mechanism in controlling the effectiveness of this technique. Therefore, monitoring the quality of bond during the service life of the structure is of crucial importance for structural health evaluation. The bond quality may be affected due to environmental conditions which results in local detachments at the FRP/sub...
Experimental investigation on the long-term durability of bond between FRP and ...
Ghiassi, Bahman; Oliveira, Daniel V.; Lourenço, Paulo B.The characterization of long-term behavior of bond between Fiber-Reinforced Polymers (FRPs) and masonry substrates in a service environment is a crucial issue for design purposes, which requires a full body of experimental and theoretical information. Most of the research in this area has been devoted to FRP-concrete specimens, and the available data for FRP-strengthened masonry components are still lacking. Th...
Recent developments in durability of FRP-masonry systems
Ghiassi, Bahman; Oliveira, Daniel V.; Lourenço, Paulo B.Fiber reinforced polymers (FRPs) are being more and more used for external strengthening of masonry structures. Therefore, characterization of the short and long-term behavior of bond between FRP composites and masonry substrates in a service environment is crucial for design purposes. A full body of experimental and theoretical investigations is required for durability assessment of FRP strengthened structures...
Experimental research on masonry wall and timber elements connection
Moreira, Susana; Oliveira, Daniel V.; Ramos, Luís F.; Lourenço, Paulo B.Studies developed for the past years and recent earthquakes have brought to light the importance that efficient connections between structural elements can have in the global behaviour of the structure. Although out-of-plane mechanisms of masonry walls are considered to be local, the reality is that their occurrence can lead to total collapse of the structure. The scarcity of data, both at experimental and nume...
Experimental investigation on the repair of rammed earth by means of injection ...
Silva, Rui André Martins da; Oliveira, Daniel V.; Schueremans, Luc; Lourenço, Paulo B.; Miranda, Tiago F. S.This paper assesses the adhesion capacity of unmodified mud grouts used to repair structural cracks on medium and large scale rammed earth specimens. Beam and wallet-specimens were manufactured using a soil from Alentejo (Portugal), whose particle size distribution had to be first corrected due to its high clay content. An “artificial” (composed by kaolin and limestone powder) and a “natural” (composed by sieve...
Rheological properties of alkaline activated fly ash used in jet grouting appli...
Cristelo, Nuno; Soares, Edgar; Rosa, Ivo; Miranda, Tiago F. S.; Oliveira, Daniel V.; Silva, Rui André Martins da; Chaves, Ana Margarida Vaz AlvesThe application of alkaline activated fly ash to soil stabilisation has been recently studied, and although the structural behaviour was adequate, some concerns were raised regarding its apparent viscosity, which proved to be an important issue in jet grouting applications. Therefore, this paper deals with the experimental study of rheology of alkaline activated fly ash-based grouts, namely with: setting time o...
Experimental behavior of natural fiber-based composites used for strengthening ...
Codispoti, Rosamaria; Oliveira, Daniel V.; Fangueiro, Raúl; Lourenço, Paulo B.; Olivito, Renato S.This paper deals with the experimental characterization of the tensile behavior of fiber-based composites and flexural strength of natural fiber reinforced polymer (NFRP) sheets externally glued on masonry bricks, in terms of load capacity and stress distribution along the bonded length. The bricks adopted for this experimentation are solid clay bricks, typically used in ancient masonry structures. Non-impregna...
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