Study On Seismic Performance of Earth scraper Structure Under Zone-Ⅳ and Zone-Ⅴ by Using Etabs

Abstract

Abstract - Earthscraper structures, also known as substructures or underground structures, are architectural marvels located partially or entirely beneath the ground level to facilitate future development. The specific structure in question was designed using Etabs software and comprises 15 stories, with 5 stories above ground level (GL) and 10 stories below ground level (GL). To ensure the overall stability of the building against seismic forces, a seismic analysis was conducted for Zone-IV and Zone-V, considering soil type-II medium soil conditions. The primary objective of the structural design was to withstand ground shaking during an earthquake and maintain its integrity. A central opening measuring 31mx31m was incorporated throughout the building for ventilation and natural light. Under seismic Zone-IV, the maximum story drift was observed in story-2 along the X-direction and story-2 along the Y-direction. For seismic Zone- V, the maximum drift occurred in story-1 along the X-direction and story-11 along the Y-direction. The maximum natural time period for the structure was found to be 0.358 seconds. Comparing the two seismic Zones, Zone-V exhibited a higher maximum story displacement, measuring 15.15mm, while the Zone-IV had a maximum displacement of 10.10mm. this indicates the Zone-V is more susceptible to displacement during seismic events. Key words: Earthscraper, seismic analysis, story drift, etc.