Vibration Machinery and Seismic Resistance Behavior Analysis of Steel Structures in Different Zones

Abstract

The dominant lateral force that influences the structural stability is due to earthquakes, primary cause to unbalance the structure, such unbalances results in collapse and loss of life and property. Earthquake vibrates the structures in response to ground shaking at its foundation. If the structure subjected to other loads & vibrations such as walking vibration and machinery loads, thus influence the effect of earthquake on the structure. This study makes an attempt to know, how these loads along with seismic loads influence the high raised steel structures.Different seismic resistant codes have provisions to take into account the seismic vibration of structures. However, structural engineers should be aware of the intensity of the hazards with a view to taking precautionary measures by considering the machinery weights in analysis and giving the safe structure by advising clients andmaking proper decisions in analysis at different zones or making them aware of the importance of proper maintenance of the structure. In this study, a G+7 story steel building is considered. In this structure, mechanical equipment such as lathe, drilling and milling machines are placed in G-story, and the other stories are used for office purpose such that walking vibration is given in defined planed path in the structure. While placing and operating the mechanical equipment it will induce additional loads into the structure. The influence of such additional loads &seismic loads on the structure in terms of story displacement, story drift and base shear are compared between all zones by using ETABS software for analysis.
Keywords: Seismic analysis; vibration; machinery; seismic zones; Steel Structure