| Title |
Wind Pressure for the Design of Clading Building |
| Abstract |
Internal pressure in building due to wind have assumed more importance recently for designing of exterior cladding. This paper attempts to address various questions and to suggest the routes towards solution for cladding design.A geometric model to building was built from acrylic to a scale of 1:400. This included main building and the podium. The building was instrumented to measure exterior pressure at 466 locations. The louvers for ventilation at the "pit" floor were simulated by screens over the openings. The pressure model was tested in the wind tunnel under simulated condition of the site.For nominally-scaled building with nominal leakage, wind induced internal pressure can be estimated through the spatial averaging of the mean external pressure measured in the wind tunnel Statistical predictions of the differential pressure were then determined following procedures similar to those used for external pressure. The lagest predicted 100-year-return differential pressure is 1.6kPa, found at tap 439 on the podium roof, probably caused by "downwash" of wind redirected from the building wall above the podium. The lagest predicted 100-year-return differential suction is 2.3kPa, found at tap 352 on the wall of a roof structure. |