WIND LOADS ON CANOPY ROOFS

Abstract

The primary aim of present study is to carry out detail wind tunnel tests on multi span trough canopy roofs. Two types of trough canopy roof models were made for the present study. One was Perspex sheet model and another was wooden model. Two types of Perspex sheet roof models were made. One roof model was instrumented on upper roof surface and another model was instrumented on lower roof surface. The scale considered for the trough canopy roof models was 1:100 vis a vis prototype building. Hence the models dimensions were taken as length 300mm, breadth 300 mm and eave height 150 mm. The roof slope was kept was 100. Wind pressure distribution was found out for upper surface as well as lower surface of trough canopy roof. The configurations were considered namely single span, two span and three span. Total seven wind incidence angles were considered for the present study namely 00, 15°, 30°, 45°, 60°, 750 and 90°. Wind pressure coefficient on trough canopy roof is given in code of practice of various countries but the information is not complete and not suitable for design of multi span trough canopy roofs. Hence present study was carried out to find out wind pressure coefficients for multispan trough canopy roof for upper as well as lower roof surface.