EXPERIMENTATION. OF WIND FLOW OVER DIFFERENT TOPOGRAPHY

Abstract

The present work reports an experimental investigation to study topographic effects on flow characteristics of wind. A gable roof building model having 10 degree slope with and without overhang has been chosen to acquire data. For pressure measurements the experiment is being conducted for stand alone condition on flat terrain and at different locations of the hilly terrain. The roof of the building model has been divided into various zones and the pressure tubing is fitted through stainless, steel tubes at the surface of the roof. The experiments have been performed on hilly terrain model of a scale of 1:100 with a low rise building model, with and with out overhang of a scale of 1:75 placed over four different locations on the hilly terrain model i.e., bottom, left, right and top side of the hilly terrain model the approaching terrain to the hill has been considered as an "Terrain category 2 Open terrain with well scattered obstructions having heights generally between 1.5 to 10 m. A low rise building is very common in the Indian context i.e., Gable roof building is most common among low buildings of all types and as such this has been the focus of study. The roof of such building continues to be quiet vulnerable to damage in severe wind conditions. Buildings are located at different types of topography with various plan forms. In the light of above a study of assessment of wind induced damage of buildings and structures requires a large amount of data from field. Due to various evident reasons it is very cumbersome to have a complete data for all possible situations to make damage assessment and to propose mitigation. strategy.