Liquefaction Studies on Guaratuba Bay Erosion

The paper presents the studies conducted to explain the erosion process which occurred at the Guaratuba bay coast located in the South of Brazil [Tavares, 1989]. The subsoil in the area is composed mainly of be clean sand. The erosion occurred as a result of the liquefaction of the sandy subsoil and is described in the text. Several buildings, including the City Hall, and some streets near the affected area were sunk into the subsoil. The phenomenon took place on the 23rd of September of 1968. In the years of 1998, 1999 to March, 2000, new studies were performed to evaluate the strength potential of the sand. The implications of the findings as far as the seismic aspects of the liquefaction phenomenon is concerned is discussed in the text

Conditions of Structural Stability and Vibration Damage

The paper presents the investigation conducted in a one-story-house and its rear annex which suffered severe damages due to a process of differential settlements of their foundations, flowing water in the subsoil and vibrations of the traffic of vehicles on the street nearby. The house is located in the city of Curitiba in the south of Brazil. The subsoil is composed of tropical clay and sand silty soils of Guabirotuba Formation. It is formed of pleistocene sediments in Curitiba area. The foundations of the house and the annex were in excavated small 8” diameter short concrete piles. Due to the differential settlements, a great number of cracks appeared in the house and in the annex walls. Many walls were distorted badly. Flowing water is presented in the subsoil. At the annex rear house the piles are embedded in a non-compacted fill. A concrete counterfort wall was constructed on the north border side of the site with a deficient drainage system. The damages which the house and the annex have been suffered due to the combination of geotechnical factors were such that the results were comparable of a earthquake with magnitudes M=5 to M=63/4, as the analysis showed. The studies showed valuable conclusions about the relationship between the differential settlements existing in the construction and the results of the seismic effects which are presented in the text. The house and the annex were underpinned, and their foundations were strengthened through the use of injected piles. The implications of the findings as far as the seismic aspects of the liquefaction phenomenon are concerned are discussed in the text

É chegada "a ocasião da negrada bumbar": comemorações da abolição, música e política na Primeira República "É chegada a ocasião da negrada bumbar": commemoration of the slavery abolition,culture and politics in the Brazilian First Republic

Este artigo tem como objetivo problematizar a questão da participação política dos negros na Primeira República a partir das comemorações do 21º aniversário da abolição realizadas na capital federal, em 1909. Personagens de destaque neste evento, o político Monteiro Lopes e o músico Eduardo das Neves são tomados como exemplos emblemáticos de formas de expressão e participação experimentadas naquele período.<br>This article aims to discuss the issue of mobilization and political participation of black people in I republic from the celebrations of the 21st anniversary of the abolition held in the federal capital in 1909. Celebrities featured in this event, the politician Monteiro Lopes and musician Eduardo das Neves are taken as significative examples of forms of expression and participation experienced in that period