Numerical Simulation of Wind-induced Internal Pressure on Low-rise Buildings
The economic loss of structures destroyed by Typhoon in the coastal cities of China is gigantic every year. Lots of wind disaster investigations have revealed that the main reason for collapse of roofs and walls in Typhoon is the combined effect of external pressure and wind-induced internal pressure which is caused by the sudden openings such as the failure of windows or doors. Most studies on wind-induced internal pressure focused on the part of the moment when the opening occurred and the transient dynamic response of the roof by theoretical analysis, wind tunnel test and field laboratory test. This paper is primarily concerned with the internal pressures distribution characteristics vary with some influencing aspects at steady flow stage. A series of numerical simulations were carried out by using Computational Fluid Dynamics (CFD) software. Results from the simulation show that the internal pressure is equal to the external pressure at the openings in the case of the single dominant opening, which agrees well with the analytical solution. It is also found that the wind-induced internal pressure increases with the ratio of windward opening area and leeward opening area ( AW/AL ) when the flow approaches perpendicular to the windward wall. However, it tends to be a constant when the ratio is larger than 3. Furthermore, the internal pressure decreases with the increase of the wind incidence angle when AW/AL is fixed. The combination of the internal and external pressure (net pressure) of the roof of an open building could be larger than about 2.7 times the nominally sealed building, and in that case the whole roof may collapse in Typhoon.
Wind-induced internal pressure Numerical simulation Low-rise Building
Fangfang Song Jinping Ou
Department of Urban & Civil Engineering,Harbin Institute of Technology Shenzhen Graduate School,Shen Department of Urban & Civil Engineering,Harbin Institute of Technology Shenzhen Graduate School,Shen
国际会议
第六届国际振动工程会议(The 6th International Conference on Vibration Engineering)(ICVE’ 2008)
大连
英文
2008-06-04（万方平台首次上网日期，不代表论文的发表时间）