Analytical Study of Pre Engineered Building Subjected to Lateral Loads

Abstract

Pre-Engineered Building (PEB) constructions are nowadays popular owing to their advantages over conventional Concrete and Steel constructions. Concrete structures are bulky and impart more seismic weight and less deflection whereas Steel structures instruct more deflections and ductility to the structure, which is beneficial in resisting earthquake forces. PEB Construction combines the better properties of both steel and concrete along with lesser cost, speedy construction, better quality control, sustainability etc. The pre-engineered steel building system construction has great advantages to the single storey buildings, practical and efficient alternative to conventional buildings. The design of Pre-Engineered Building structures using tapered sections as the primary frames has saved quantity of steel substantially when comparing to the steel used on Conventional Steel Building structures. The aim of the present research work is to study the Analytical behavior of PEB subjected to lateral loads. In this study a Pre Engineered warehouse building of span 76 meters and 36m width is considered. Seismic analysis is done on the PEB structure with two types of lateral bracing system i.e. diagonal bracing and chevron bracing and with three different types of roof systems i.e. Tapered roof, Mono slope roof and curved roof and three different slopes i.e. 1:8, 1:10 and 1:12.

The analysis is done with IS 800:2007 (Indian standard code). Parameters such as, bending moments, displacements, base shear, steel takeoff and utilization ratios are arrived. This study helps in achieving best roof and bracing combination for better performance of the building during lateral loads. It also includes achieving economy of the structure with IS 800:2007 codal provisions. The outcome of our extensive analysis reveal that, among the diverse combinations considered, the PEB with a 1:10 roof slope, utilizing diagonal bracing in conjunction with pitched roofs following the Indian code IS 800:2007, besides that exhibited superior structural integrity, the second most desirable bracing and roofing combination was 1:10 roof slope curved roof and diagonal bracings which emerged as another highly favourable and reliable configurations. adhering to IS 800:2007.