WIND EFFECTS ON MULTI-STORIED BUILDINGS: A CRITICAL REVIEW OF INDIAN CODAL PROVISIONS WITH SPECIAL REFERENCE TO AMERICAN STANDARD

For preliminary design including the proportioning of the structure, the variation of wind force on a structure with variation of site parameters and structural parameters should be known. The present study is an effort to achieve the same, primarily based on Indian wind code. The proposed draft of the Indian wind code is also included in the scope of the study. Comparisons of the wind forces obtained by Indian Standard and that by American Standard are also presented for some representative cases to gaze the relative level of protection attributed by Indian wind codes. The study also includes an exhaustive comparison of the wind forces obtained by Force coefficient based static analysis and Gust factor based dynamic analysis interpreting where which method should be used for better protection. The general observations and simple guidelines emerged from the study may prove useful for choosing the appropriate method by design engineers, depending on the requirement of safety, economy and availability of time. The large number of case studies presented in the paper in the form of the variations curves may be used for preliminary design and cross cheeking the results and hence, may prove useful in the design offices.