Pushover Analysis and Capacity Design for Hollow Pre Engineered Building for Sub Station

Pre-Engineered Building (PEB) concept originated during 1960’s in United States. They are a pre-determined assembly of structural members, uses tapered built up sections for frames and cold formed sections for purlins and girts, which gives a huge reduction in the tonnage of steel, therefore, resulting in a lighter and more economical construction. This project is focused on the Pushover analysis and Capacity design of a Pre-engineered steel Substation building using Hollow section for frames and Secondary members, with provision for supporting a crane of 6 Ton and 12.5 Ton capacity. This project is completely done referring to Indian Standard Codes. The project comprises of a Substation building of size 48 m span x 61 m length x 14 m eave height. Roof slope angle of 6° and metal sheeting on roof and walls is taken for the project work. I section and Hollow Rectangular Section (HRS) is used for main frame members and Z sections for roof purlins and wall girts. The building is analysed and designed by considering various loads such as Dead load, live load, wind load, seismic load and crane load as per IS 875 : 1957, IS 1893 : 2002 and the other guidelines for the crane loads. Analysis is done using STAAD-Pro software. Pushover Analysis is done using SAP 2000 V17 software. A comparative study is made between Tapered I section PEB and Hollow section PEB and Hollow section PEB is found to provide better results than Tapered I section PEB without compromising on its structural adequacy.