Study on Gust Factor Method for Multi-purpose Cyclone Shelter

Abstract

Cyclone is one of the major threat hovering over Indian coastal regions and need for safe shelter is now utmost to save the endangered population from the hazardous outcomes. Also, to save the structure from deterioration a multi-purpose cyclone shelter will be most affordable during emergency and nonemergency period. Present Indian Codal provisions underlines that the flexible structures ought to be designed by peak wind approach in addition to mean wind approach related to gust factor method and severe of the two is to be designed as design load. Use of gust factor method for high-rise structures is common but for low-rise important structures there are a few researches available. In this study two G + 1 and G + 2 storey models are considered and analyzed using IS 456:200, IS 1893: 2016 and IS 875: 2015 with gust factor method. Guidelines from Indian government for cyclone shelters and school buildings are followed and loadings from Indian Standards code are considered. This study aims to provide information on behavior of low-rise structure of a school building by changing height of the structures. For that MS-Excel spreadsheet was prepared for gust factor method and 80 models were prepared using ETABS software by changing height of column members, adding a new floor above existing structure, changing seismic zones and increasing basic wind speed. Various parameters such as storey force, base shear and maximum top displacement are scrutinized for above mentioned cases for four structures of different heights.