Pre-fabricated multi-storey steel structure exposure to engineering seismicity

Abstract

Increasingly Embraced for Diverse Architectural Applications, pre-fabricated steel building systems offer a multitude of advantages over conventional construction methods, despite their relatively recent introduction. While their construction methodology is well-grasped concerning gravitational forces (dead and live loads), their behavior under dynamic loads, such as seismic and wind forces, remains less explored. Unique structural configurations within these edifices can yield notably distinct structural responses and failure modes compared to their conventional counterparts. Existing research has demonstrated that modular structures, when subjected to lateral forces, often experience failure in critical components, specifically the columns. The compromise of these pivotal elements can lead to partial or complete structural collapses. In the Indian context, pre-fabricated structures have found extensive employment in development projects. Yet, their performance under seismic conditions has been compromised due to inherent design shortcomings. Particularly in regions prone to high seismic activity, earthquakes have the potential to inflict substantial damage upon these structures if not meticulously planned for. Recent devastating seismic events have underscored the inadequacies of conventional construction standards, where systems designed to withstand seismic forces are anticipated to absorb and dissipate energy during intense tremors. Consequently, traditional seismic systems can exhibit substantial residual deformations and widespread structural deterioration post major earthquakes. Failures frequently manifest at the junctures where structural members are interconnected in such scenarios. To confront these challenges head-on, this paper recommends the substitution of steel structures for reinforced concrete (RC) structures within various high seismic zones across India. The envisaged design and analysis will leverage a range of software tools including AutoCAD and Staad.PRO. The primary objective is to bolster the seismic resilience of buildings and curtail the vulnerability of structural failure amid seismic events.