JELENA MILOSEVIC 1; MÃRIO LOPES 2; RITA BENTO3; ANTÓNIO SOUSA GAGO4
1) Researcher, ICIST, IST, University of Lisbon, E-mail: jelena.milosevic@ist.utl.pt
2) Assistant Professor, ICIST, IST, University of Lisbon, E-mail: mlopes@civil.ist.utl.pt
3) Associate Professor, ICIST, IST, University of Lisbon, E-mail: rita.bento@tecnico.ulisboa.pt
4) Assistant Professor, ICIST, IST, University of Lisbon, E-mail: gago@civil.ist.utl.pt
Some experimental tests were performed within the scope of Portuguese national research project, SEVERES, to characterize the shear behaviour of old masonry buildings in Lisbon. Diagonal compression, triplet and static cyclic tests were performed and the results obtained are presented in this paper. Seventeen masonry specimens with different dimensions (depending of the type of test) were built using traditional techniques and materials. Two types of mortar were used: air lime and hydraulic lime mortar, with traditional lime stone. Based on the results achieved different masonry characteristics were assessed: i) diagonal tensile strength via diagonal compression tests, ii) initial shear strength and coefficient of friction by triplet tests, and iii) shear strength through static cyclic tests. Moreover, load-displacement diagrams and expected collapse mechanism are presented. According to the results obtained it can be concluded that the values reached are inside the range of ones obtained by other researchers for similar masonry specimens.
Keywords: Rubble Stone Masonry, Shear Strength, Cohesion, Diagonal Compression Test, Triplet Test, Cyclic Static test