How to calculate stiffness of storey to avoid soft storey of multi-storeyed building?
Join TheConstructor to ask questions, answer questions, write articles, and connect with other people. When you join you get additional benefits.
Log in to TheConstructor to ask questions, answer people’s questions, write articles & connect with other people. When you join you get additional benefits.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Avoid soft storey? A soft storey is a storey with lateral stiffness less than the storey just above. So technically, you cannot avoid soft storey just by calculation. Right?
Well, according to the new code for seismic design, IS 1893 Part I (2016), infill masonry walls in soft storeys of RC buildings can be modeled as diagonal struts to contribute to lateral stiffness.Though this doesn’t guarantee that the resulting storey stiffness with the contribution of infill walls, will be greater than that of the storey above.
[Note : Even after reading the answer please do refer to table 6, fig. 4 and section 7.9 of IS 1893 Part I (2016) for two formulae mentioned above and a clearer understanding of the method in detail.]