Simulação experimental da interação vento-chuva / Experimental simulation of the wind-rain interaction

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

2010

RESUMO

Simultaneous occurrences of the combined action of rain and wind in different types of structures have been observed around of the world in the last 20 years. This mechanism has been causing curiosity to engineers and researchers due to their jeopardizing consequences to constructions. In these last twenty years people has been seeking for a way to simulate, the most faithfully possible, this type of combined action of rain and wind. This happened due to the fact that the search for solutions to the problems related to the combined action of wind and rain were based on empirical methods (trial and error type). This kind of problem, that may seem small to the most careless eyes, may cause since small water infiltration problems in buildings, up to the own safety of the structure due to the action of water, a corrosive agent. The better knowledge of the phenomenon through experimental tests will allow engineers the problem identification already in the design phase and consequently a palliative solution to it. For the study of this phenomenon, a model of an existent gymnasium in city of Rio de Janeiro was used. Two reduced scale models of the gymnasium were used. The first model, built in a 1/150 scale was instrumented with hot-wire probes to identify the flow characteristics, and the second model, in the scale 1/64, was instrumented with a special water sensitive paper, where the tests were accomplished combining the rain and wind action. The tests for the model in scale 1/150 were performed for wind incidences intervals of 15o. With the aim of study the behavior of the wind-rain interaction, three groups of tests were performed. After that, the model was again tested for two configurations of protective devices. From the analysis of the results, it is possible to conclude that the experimental simulation of the wind-rain interaction process is possible, and that more tests are necessary to understand the process.

ASSUNTO(S)

chuva wind tunnel vento : estruturas rain wind modelos reduzidos pathology estruturas (engenharia) infiltration patologia : construção civil túnel de vento : ensaios

ACESSO AO ARTIGO

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