Paper 3: Volume 5 No.1 June 2006 Edition
Wind Pressure Coefficients for Different Building
Configurations with and without
an Adjacent Building
Takao
Sawachi1, Eizo Maruta2, Yasuo Takahashi3,
Ken-ichi Sato3
1 National Institute for Land and Infrastructure Management,
Building Department
,
Japan
2 Nihon University,
College
of
Industrial
Technology
,
Japan
3 Building Research Institute, Department of Environmental
Engineering
,
Japan
Abstract
The design protocol for wind-driven cross ventilation in buildings
should include two processes, namely the determination of required
ventilation rate to reduce the room temperature and the prediction of the
ventilation rate resulting from the arrangement of openings and wind
pressure on those. Computer fluid dynamic techniques (CFD) have the
potential to be a useful tool in such calculations but another more
practical way is the airflow network model combined with the wind pressure
coefficient (Cp) values for buildings with different shapes and
surrounding conditions. The authors have conducted a series of wind tunnel
experiments using scale building models to obtain the wind pressure
coefficient distribution on the building envelope and have developed a
database to be used as input data for network simulation programs. In the
estimation of Cp, one of the challenging problems is the effect
of surrounding obstacles such as adjacent buildings. There are some works
that take this effect into consideration, by making corrections to the
wind pressure coefficients of an isolated building. Firstly, this paper
applies such correction knowledge and secondly, tries to draw some general
rules, which can be applied when estimating the wind pressure coefficients
for a building which is surrounded by adjacent buildings.
Key words: wind pressure
coefficients, surrounding obstructions, wind tunnel experiments, model
buildings, network simulation program.
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