Abstract

There is always an increasing need for tall buildings to accomplish the needs of the present day increasing population. In tall buildings, usually wind is the critical load which needs to be considered for the safety and serviceability of the structure. There are two components of wind namely along and acrosss wind load components and their effect needs to be assessed for wind resistant designs. In this paper, along and across wind loads acting on tall buildings located in terrain category IV having height varying from 90m to 240m have been computed as per the Indian standard code IS 875(Part 3): 2015 considering the effect of interferenece. The across and along wind load induced maximum base shears and base moments were compared to assess the governing wind load component acting on a tall RC framed building. It was deduced that the effect of along wind force is governing for up to a height of 150m in the case of long body orientation while it is the across wind force which is governing for all the buildings in case of short body orientation.