Abstract
Cladding for dome roofs is often made of membrane materials that are light and easy to install. Due to these characteristics, wind damage to dome roof cladding is very common. In particular, open or retractable dome roofs are prone to wind damage because of inadequacies in wind load calculations. In this study, the wind pressure characteristics of a dome with a central opening were investigated. Wind tunnel tests were performed, and the pressure distribution was investigated by analyzing external and internal pressure coefficients. Based on the experimental results, the peak net pressure coefficients for the cladding design of a dome roof with a central opening were proposed. For the external peak pressure coefficients, the values of leeward regions were similar despite height–span ratios and turbulence intensity values. For the internal peak pressure coefficients, negative pressure was dominant, and the coefficients were not significantly affected by changes in height–span ratio. This tendency locally increased the negative peak net pressure, in which the load acts in the upward direction, and relatively significantly increased the positive peak net pressure, in which the load acts in the downward direction.
Highlights
Line 1 was defined as windward, and line 7 was defined as leeward
Wind pressure characteristics for the central open dome were analyzed via wind tunnel tests, and the applicability of thefor wind load code was examined based on
Wind pressure characteristics the central open dome were analyzed a comparison with the Japanese wind load code
Summary
The model used in the experiment (Figure 1a) was comprised of acrylic, and the roof of the central open dome was simulated. Ten pressure taps were installed per line for an open ratio of sidesPressure of the roof surface. Seven pressure taps were installed per line with an open ratio of sides of the roof surface. Ten pressure taps were installed per line for an open ratio of 30%, for a total of taps. Because ataps spherical dome roof symmetrical values with for a total were installed pershows line with an open ratio of 50%, to the centerline, the windthe direction was adjusted to organize the data into a total of aseven respect toofthe direction to organize the data into total for a total. Because awind spherical domewas roofadjusted shows symmetrical values with respect lines fromlines windward line 1 to leeward line
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