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Shaking table testing of an existing masonry building : assessment and improvem...
Mendes, N.; Lourenço, Paulo B.; Costa, Alfredo CamposThis paper aims to assess and improve the seismic performance of an existing masonry building with flexible floors, representative of a Portuguese building typology—‘gaioleiro’ buildings. The study involved seismic tests and dynamic identification tests of two models (nonstrengthened and strengthened) in the shaking table. Each model was subjected to several seismic tests with increasing amplitude. . Before the fir...
In Situ Breakage of Implanon® - Two Cases of a Rare Occurrence
Torres, R; Mendes, N; Machado, AI; Marques, CBACKGROUND: In situ breakage of Implanon® is a rare occurrence with unknown clinical significance. Authors report two different cases of broken Implanon® of women attended at our Family Planning Clinic. DISCUSSION: In situ implants may spontaneously and asymptomatically break, although some uncertainty relies on whether that situation has a real impact on the contraceptive effectiveness or on bleeding patterns...
Os Factores Genéticos na Perda Gestacional
Francisco, C; Mendes, N; Lima, A; Martins, L; Serrano, FPregnancy loss is the most common obstetric complication. Multiple factors have been associated with recurrent or sporadic pregnancy loss, and genetic factors, particularly at earlier gestational ages, are the most important ones. The proportion of miscarriages due to chromosomal factors decreases with increasing gestational age. The most common chromosomal abnormalities in early losses are autosomal trisomies,...
Estudo do Aborto Recorrente. Ainda há Lugar para a Histerossalpingografia?
Aboim, L; Mendes, N; Pinto, G; Rosa, D; Serrano, FOverview and Aims: The investigation of recurrent miscarriage includes the study of uterine morphology. 3D ultrasound allows the evaluation of the morphology (cavity and outer contour), reducing the need for invasive tests such as hystero - salpingography (HSG), hysteroscopy and laparoscopy. We evaluated the diagnostic agreement between HSG and 3D ultrasound in the study of the uterine cavity morphology. Study ...
Desempenho sísmico de edifícios antigos de alvenaria : ensaios em plataforma sí...
Mendes, N.; Lourenço, Paulo B.; Costa, Alfredo CamposEste artigo apresenta os ensaios realizados na plataforma sísmica do Laboratório Nacional de Engenharia Civil sobre o desempenho sísmico de edifícios antigos de alvenaria. O programa experimental envolveu a definição de um protótipo representativo das características correntes dos edifícios gaioleiros, que posteriormente foi utilizado para a construção dos modelos experimentais. Devido às dimensões e limite de ...
Seismic performance of ancient masonry buildings : a sensitivity analysis
Mendes, N.; Lourenço, Paulo B.Ancient masonry structures are usually associated to a high seismic vulnerability, mainly due to the properties of the materials (low tensile and moderate shear strengths), weak connections between floors and load-bearing walls, high mass of the masonry walls and flexibility of the floors. For these reasons, the seismic performance of traditional masonry structures has received much attention in the last decade...
Avaliação experimental do comportamento sísmico de casas de madeira
Lourenço, Paulo B.; Branco, Jorge M.; Mendes, N.; Costa, A. C.; Candeias, PauloAs casas de madeira estão a ter um desenvolvimento rápido na Europa devido a aspetos tais como a sustentabilidade e o elevado grau de industrialização e prefabricação, que se traduzem em facilidade e rapidez de montagem. Os sistemas mais tradicionais de estruturas de madeira e os sistemas inovadores recentes são agora aplicados não apenas no norte da Europa mas, crescentemente, no sul da Europa, onde a perigosi...
Modal identification and stiffness degradation of concrete block masonry buildings
Avila, Leonardo; Lourenço, Paulo B.; Vasconcelos, Graça; Mendes, N.A new construction system for masonry buildings is analysed. Identification of modal parameters has been carried out in two structural solutions by using this system namely reinforced and unreinforced symmetric two-story concrete block masonry buildings. Experimental shaking table tests were developed on these buildings by incremental inputs. Traditional modal analysis by using low amplitude input motion was ma...
A Rare Obstetric Outcome in Uterus Didelphys with Obstructed Hemivagina and Ips...
Mendes, N; Lermann, R; Francisco, C; Palma, FBackground: The unique clinical syndrome of uterus didelphys, obstructed hemivagina, and ipsilateral renal anomaly is very rare and can be quite difficult to recognize because of the enormous heterogeneity in its clinical presentation. There are few long-term reports of the reproductive performance of women with this syndrome following treatment, or about the location of subsequent pregnancies. Case: A case in ...
Seismic performance of the St. George of the Latins church : lessons learned fr...
Lourenço, Paulo B.; Trujillo, A.; Mendes, N.; Ramos, Luís F.This work addresses the seismic safety of the remainings of one church in Famagusta (Cyprus), including also a historical survey, inspection and diagnosis. The seismic safety is studied in detail, using limit analysis of collapse mechanisms as preliminary safety assessment. Then, a finite element model was prepared and updated using dynamic identification results. The updated model was subjected to non-linear s...
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