Statistical analysis of the second order effects variation with the stories height of reinforced concrete buildings
Resumo In this paper the simplified method to evaluate final efforts using γz coefficient is studied considering the variation of the second order effects with the height of the buildings. With this purpose, several reinforced concrete buildings of medium height are analyzed in first and second order using ANSYS software. Initially, it was checked that the γz coefficient should be used as magnifier of first order moments to evaluate final second order moments. Therefore, the study is developed considering the relation (final second order moments/ first order moments), calculated for each story of the structures. This moments relation is called magnifier of first order moments, “γ”, and, in the ideal situation, it must coincide with the γz value. However, it is observed that the reason γ / γz varies with the height of the buildings. Furthermore, using an statistical analysis, it was checked that γ / γz relation is generally lower than 1,05 and varies significantly in accordance with the considered building and with the presence or not of symmetry in the structure.
Parâmetros de instabilidade global das estruturas de concreto armado segundo a nova NBR-6118
Neste trabalho sao estudados os parâmetros de instabilidade global das estruturas de concreto armado, segundo a revisao da NBR 6118 (2000/2001): o parâmetro de instabilidade e o coeficiente z. Atraves da analise de alguns edificios usuais de concreto armado, processados em primeira e segunda ordem, busca-se estabelecer o grau deconfiabilidade desses parâmetros e avaliar a eficiencia do coeficiente z como majorador dos esforcos de primeira ordem, para a obtencao dos esforcos finais, que incluem os de segunda ordem. Sao tambem discutidos os procedimentos e recomendacoes relativos a verificacao da estabilidade global apresentados na nova NBR 6118.
‘There is no race so wretched that there is not something out there that cares for them’: Multiculturalism, understanding, empathy and prejudice in Discworld
Multiculturalism is at the heart of Mel Gibson’s chapter. Arguing that stories situated in Ankh-Morpork, Discworld’s major capital and the focal point of many Discworld stories, in particular deal with the opportunities, problems and, sometimes, sheer craziness associated with multi- and cross-cultural debates and realities, Gibson draws on European models of multiculturalism. She analyses how, alongside debating the nature of prejudice and oppression, the City Watch stories in particular explore ways in which a multicultural space may work.