Repositório Colecção: Comunicações a Conferências InternacionaisComunicações a Conferências Internacionaishttps://hdl.handle.net/1822/11182024-03-29T06:52:37Z2024-03-29T06:52:37ZA new sensor for crack detection in concrete structuresCruz, Paulo J. S.Diaz de Léon, Abrahamshttps://hdl.handle.net/1822/93212018-07-11T15:47:56Z2009-06-05T16:24:52ZTítulo: A new sensor for crack detection in concrete structures
Autor: Cruz, Paulo J. S.; Diaz de Léon, Abrahams
<b>Tipo</b>: conferencePaper2009-06-05T16:24:52ZFire behaviour of a fibre reinforced concrete tunnel segmentsAlves, AdéritoRodrigues, JoãoBarros, Joaquim A. O.Lourenço, LúcioSantos, S. P. F.https://hdl.handle.net/1822/92922018-07-11T10:34:06Z2009-06-03T14:13:58ZTítulo: Fire behaviour of a fibre reinforced concrete tunnel segments
Autor: Alves, Adérito; Rodrigues, João; Barros, Joaquim A. O.; Lourenço, Lúcio; Santos, S. P. F.
<b>Tipo</b>: conferencePaper2009-06-03T14:13:58ZTriaxial compression tests on bedding mortar samples looking at confinement effect analysisBarbosa, C. S.Lourenço, Paulo B.Mohamad, GihadHanai, J. B.https://hdl.handle.net/1822/91992018-07-11T17:13:13Z2009-05-21T14:01:43ZTítulo: Triaxial compression tests on bedding mortar samples looking at confinement effect analysis
Autor: Barbosa, C. S.; Lourenço, Paulo B.; Mohamad, Gihad; Hanai, J. B.
Resumo: This paper presents an analysis of the mechanical behavior of bedding mortar samples under
triaxial compression tests. When masonry is subjected to vertical loads, mechanical
interactions between blocks and bedding mortar at the joints induce lateral tension and
compression stresses. Thus, the mortar layer is submitted to a triaxial stress state that
modifies its mechanical properties and behavior under confinement effects. This
phenomenon may affect the failure mode of masonry and almost no information about this
subject is found in literature. Here, test procedures are detailed and results are discussed. In
addition to the compressive strength test results, also elastic modulus and Poisson ratio
values are addressed. Significant differences were observed among triaxial and uniaxial
standard test results. The obtained mortar behavior under different levels of lateral pressure
is compared with test results done by other researchers in order to produce relevant
conclusions for different mortar compositions.
<b>Tipo</b>: conferencePaper2009-05-21T14:01:43ZA new approach for modelling the NSM shear strengthening contribution in reinforced concrete beamsBianco, V.Barros, Joaquim A. O.Monti, G.https://hdl.handle.net/1822/91982018-07-11T15:09:10Z2009-05-21T13:34:33ZTítulo: A new approach for modelling the NSM shear strengthening contribution in reinforced concrete beams
Autor: Bianco, V.; Barros, Joaquim A. O.; Monti, G.
<b>Tipo</b>: conferencePaper2009-05-21T13:34:33ZTowards a methodology for seismic assessment of monuments : the case study of Santa Maria of Belém ChurchRoque, João C. AlmendraLourenço, Paulo B.Oliveira, Daniel V.https://hdl.handle.net/1822/91962018-07-11T17:10:28Z2009-05-21T11:12:48ZTítulo: Towards a methodology for seismic assessment of monuments : the case study of Santa Maria of Belém Church
Autor: Roque, João C. Almendra; Lourenço, Paulo B.; Oliveira, Daniel V.
Resumo: This paper presents an integrated methodology for the seismic behavior characterization of ancient masonry structures of significant cultural heritage importance, towards the mitigation of the seismic risk. The proposed methodology is here applied to an outstanding case study composed by the Santa Maria of Belem Church, in Lisbon, Portugal. This Church was built during the 16lh century and is included in the Monastery of Jeronimos compound, which is one of the most emblematic Portuguese monuments.
The methodology includes the following main steps: local seismic action characterization including site effects; simple numerical modelling for a preliminary knowledge of the structural behaviour; experimental mechanical characterization of materials and structural elements; establishment and installation of static and dynamic monitoring systems aiming at a better understanding of the static and dynamic behaviour; development of advanced numerical models including the necessary calibration against relevant experimental data; non-linear dynamic analysis of the structure for different earthquake levels. According to the non-linear dynamic analyses performed in the time domain, the results obtained so far show that the monument will be under great stress against a far-field earthquake as strong as M = 7.4 (475 yrp), able to cause damage but neither local or global collapse are to be expected.
<b>Tipo</b>: conferencePaper2009-05-21T11:12:48Z