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A Comparative Study of Behavior of Multi-Storied Regular and Irregular Buildings under Static and Dynamic Loading

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Document pages: 16 pages

Abstract: One of the major challenges of constructing any high rise building forcivil engineers is to make it earthquake resistant. This resistance largelydepends on the building’s shape and structural system. A comparative study hasbeen done in this paper about the seismic behavior and response of buildingshaving a regular plan and plan irregularity (re-entrant corners). The 5building models considered in this study are 15 stories each, the same area andidentical weight. Among the 5 building models, 2 are with a regular plan(square, rectangle) and the other 3 building models are with plan irregularity(re-entrant corners). All of them are modeled using ETABS 2015 program forDhaka, Bangladesh (seismic zone 2). Static loads, wind loads and seismic loadsare considered for each model and dynamic response under Bangladesh NationalBuilding Code (BNBC) 2006 response spectrum has been meticulously analyzed. Acomparison for story displacement, base shear, story drift and time period hasbeen established and explored for dynamic response spectrum among the models.The results show that buildings with irregularity have a greater value of timeperiod, drift and displacement and hereby are more susceptible to damage duringan earthquake or disaster.

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