RESUMO O sistema construtivo de lajes planas protendidas vem ganhando mercado no Brasil, pois dispensa o uso de vigas, permite executar estruturas com menos pilares por área e reduz o ciclo de concretagem das lajes. Assim a análise de estabilidade global de edificações, leva em consideração os efeitos de 2ª ordem, sendo estes efeitos adicionais à estrutura obtidos a partir das deformações da mesma, calculadas pelo método iterativo P-Delta. A norma brasileira ABNT NBR 6118:2014 [2] avalia a estabilidade global de estruturas de concreto armado através de parâmetros práticos, sendo estes o parâmetro a (alfa) e o coeficiente gz (gama z). Nesta pesquisa busca-se estudar a estabilidade global de edificações esbeltas compostas por lajes planas, com ordem de esbeltez (relação da menor largura com a altura da edificação) de um para seis, a partir da modelagem de uma edificação com lajes protendidas não-aderentes e lajes nervuradas. Para modelagem será utilizado o programa comercial CAD/TQS.

ABSTRACT The construction system of prestressed flat slabs has been gaining market in Brazil, since it eliminates the use of beams, allows you to perform structures under coluns by area and reduces the cycle of concrete slabs. Thus the analysis of global stability of buildings, takes into account the effects of 2nd order, and these additional effects to the structure obtained from the deformation thereof, calculated by the iterative method P-Delta. The Brazilian ABNT NBR 6118: 2014 [2] assesses the overall stability of reinforced concrete structures through practical parameters, which are the parameter a (Alpha) and gz (Gamma z) coefficient. In this research we seek to study the global stability of slender buildings consist of flat slabs, with slenderness (ratio of the smaller width with the height of the building) approximately one to six, from the modeling of a building with prestressed slabs nonadherent and waffle slabs. To model will use the commercial software CAD / TQS.

In order to characterize the epidemiology of American Cutaneous Leishmaniasis (ACL) in a periurban area of the municipality of Sabará in the metropolitan region of Belo Horizonte (MRBH), an area until then considered free of the disease, a cross sectional survey was undertaken in 1990. The survey of the population consisted of 1119 interviews and 881 clinical examinations using Montenegro's skin test (MST). A low prevalence (3.7%) of positive MST was encountered. The disease had been occuring in the area for about 20 years in the form of sporadic cases. The predominant species of sandfly both in domestic areas and nearby areas of secondary vegetation was Lutzomyia whitmani. A canine survey of delayed hypersensitivity to the antigen P10,000 identified only one dog with a positive reaction out of 113 examined. The transmission of ACL in MRBH was confirmed. The occurrence of the disease in women, children and individuals with no contact with forest areas as well as the presence of potential vector species in the domiciliar environment, suggests the transmission of the disease in this environment.