MEAN WIND PRESSURES ON ARCHED-ROOF BUILDINGS BY COMPUTATION

The calculation of mean pressure coefficients for buildings with vario us arched-roof configurations is described. The time-averaged equation s of fluid motion in three dimensions are solved, with the effect of t urbulence incorporated through the k-epsilon turbulence model. The geo metric variables that affect the wind pressures on arched-roof buildin gs are the span, the rise, the length along the axis of the arch, and the height of the vertical walls below the arch. The computed mean pre ssure coefficients increase as the length/span ratio increases when th e approach wind direction is normal to the axis of the arch. The press ure coefficients on the roof become more positive as the rise/span rat io increases.