Pressure distributions over permeable skins; a sensitive study
conference paper
Wind loads on permeable building skins are determined by the pressure difference between the external pressures and the pressures inside the cavity. External pressures are given in current building codes for a wide variety of
building shapes, location on the building envelope, effects of detailing etcetera. For the pressures in the cavity and the corresponding pressure difference over the building skins only crude and general rules are available. There is a clear lack in understanding the mechanisms behind pressure equalization and its influence on the local wind loads on building envelopes. A series of tests was conducted on a basic shape, a cube, with permeable outer skins. The properties of the shape and skins are varied and the sensitivity of the pressures inside the cavity to a range of geometrical parameters was studied. The study revealed that two mechanisms determine the flow inside the cavity, which can clearly be distinguished, and which are related to cavity
size and opening size. The results are a basis to develop models to better predict the loads on façade panels, however further work is needed to assess aspects such as three-dimensional effects in the flow and the role of turbulence
building shapes, location on the building envelope, effects of detailing etcetera. For the pressures in the cavity and the corresponding pressure difference over the building skins only crude and general rules are available. There is a clear lack in understanding the mechanisms behind pressure equalization and its influence on the local wind loads on building envelopes. A series of tests was conducted on a basic shape, a cube, with permeable outer skins. The properties of the shape and skins are varied and the sensitivity of the pressures inside the cavity to a range of geometrical parameters was studied. The study revealed that two mechanisms determine the flow inside the cavity, which can clearly be distinguished, and which are related to cavity
size and opening size. The results are a basis to develop models to better predict the loads on façade panels, however further work is needed to assess aspects such as three-dimensional effects in the flow and the role of turbulence
TNO Identifier
526338
Source title
14th International Conference on Wind Engineering, Porto Alegre, Brazil, June 21-26, 2015
Pages
1-13
Files
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