Abstract
The objective of this study is the assessment of wind pressures on buildings with roofs on different heights, such as one building with roofs at various levels or, more commonly, a number of flat-roofed buildings in a row. The study is experimental and consists of an extensive series of tests in a boundary layer wind tunnel simulating the flow over an open country terrain exposure. The basic model of the study has been designed and constructed in sections so that it can represent flat roofs in steps of different relative heights and widths. The maximum height of the model is variable and can represent a building up to 60 m high. The paper presents and discusses the results of the tests for buildings with a two-level flat roof. Data are presented in pressure coefficient form (both mean and peak values) measured locally on a number of pressure taps placed at strategic locations on the roof and wall sections of the model. The results of the study are compared with the flat roof specifications provided by wind standards and codes of practice.
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