Abstract
O comportamento estrutural simulado por programas computacionais pode ser bem diferente da realidade, uma vez que as cargas ideal- izadas no cálculo não representam fielmente a verdadeira distribuição do carregamento. Essa disparidade torna-se mais significativa em edificações altas, devido às ações verticais e horizontais que contribuem aos efeitos de segunda ordem nos pilares e tornam a precisão no cálculo de grande relevância para a estabilidade global da estrutura. Neste trabalho são comparadas as cargas nos pilares, calcu- ladas com o software comercial CAD/TQS com as cargas observadas pelo monitoramento de 7 pilares selecionados, que receberam 3 barras extras ao longo de sua altura em dois níveis antes da concretagem. Nessas barras foram fixados extensômetros elétricos para medir as deformações ao longo do tempo. A aquisição de dados foi realizada através de um módulo “Spider” que realiza e armazena as leituras. As medições foram executadas em períodos pré-fixados até a conclusão da estrutura, incluída a caixa d’água. As cargas simu- ladas para os pilares, nesta etapa de carregamento, mostraram-se coerentes com os resultados obtidos pela análise das deformações medidas e dos resultados de ensaios dos materiais empregados na estrutura.
Highlights
Due to the shortage and at the high cost of the space in the centers of the large cities, the construction of high buildings has been the main solution found by the companies
The structural behavior simulated by computer programs can be very different from reality, once the adapted loading distribution is far from the real one, and this disparity becomes more significant in high buildings because of vertical and horizontal actions which contribute to the global effects of second order for columns, making accuracy in the calculation of great importance for the stability of the overall structure
These unexpected effects are more significant in high structures, due to the great intensity of the loadings turning the structural monitoring an important tool for the real understanding of the structural behavior. This verification becomes more relevant considering that the evaluation of the loading in columns of a building is based on several dimensioning hypotheses, but of difficult verification and thoroughly recognized as high imprecision degree. This is a pioneer work in the North Region of Brazil and it consists in monitoring 7 columns of a residential building with 41 floors, located in a noble neighborhood of Belem city, aiming to compare the experimental normal forces with those provided by the commercial software CAD/TQS applying the Brazilian code’s prescriptions, considering the interaction soil-structure, the geometrical non linearity of the structure and the physics non linearity of the material intending to compare the obtained results
Summary
Due to the shortage and at the high cost of the space in the centers of the large cities, the construction of high buildings has been the main solution found by the companies. Vibrations of machines and equipments are factors that potentiate the new configurations for stresses in the structures These unexpected effects are more significant in high structures, due to the great intensity of the loadings turning the structural monitoring an important tool for the real understanding of the structural behavior. This verification becomes more relevant considering that the evaluation of the loading in columns of a building is based on several dimensioning hypotheses, but of difficult verification and thoroughly recognized as high imprecision degree. This is a pioneer work in the North Region of Brazil and it consists in monitoring 7 columns of a residential building with 41 floors, located in a noble neighborhood of Belem city, aiming to compare the experimental normal forces with those provided by the commercial software CAD/TQS applying the Brazilian code’s prescriptions, considering the interaction soil-structure, the geometrical non linearity of the structure and the physics non linearity of the material intending to compare the obtained results
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