Analysis and Design of Pre Engineering Building by Using STAAD Pro

Abstract

This thesis presents the structural modelling, analysis, and assessment of a Pre-Engineered Building (PEB) system. The objective of the study is to evaluate the performance of the structure under various loading conditions and to verify its compliance with codal provisions. The analysis was carried out using a 3D model, and results were extracted for critical parameters such as deflection, bending moment, shear force, axial force, utilization ratio, and column end reactions. Deflection checks were performed as per IS 800 limits, and it was found that both vertical and lateral deflections of rafters, purlins, and the overall building frame were within permissible values, ensuring adequate serviceability. The bending moment analysis revealed that the structure is primarily governed by the major axis, with a maximum moment of approximately 317 kNm under gravity load, while the minor axis bending was found to be negligible. Shear force distribution indicated maximum values at supports, with a peak of about 110 kN, whereas axial forces were observed to be safe with a maximum of 189 kN. The utilization ratios of all members were below unity, confirming sufficient strength and structural stability. Column end reactions were extracted to facilitate foundation design, which can be carried out efficiently using standard spreadsheets. Overall, the study concludes that the PEB system is safe, economical, and optimized, demonstrating its effectiveness in providing lightweight, cost-efficient, and structurally reliable solutions for industrial and commercial applications.