Department of Civil Engineering, Ahsanullah University of Science and Technology (AUST), Dhaka-1208, Bangladesh
The aim of this paper is to assess the seismic vulnerability and response of regular and irregular shaped multi-storey building of identical weight in context of Bangladesh. Both static and dynamic (response spectrum) analysis has been performed to study the influence of shape of a building on its response to various loading. 15 storeyed regular (rectangular, Cshape and L-shape) shaped and irregular (combination of rectangular, C-shape and L-shape) shaped buildings have been modeled using program ETABS 9.6 for Dhaka (seismic zone 2), Bangladesh. Effect of wind and static load on different shaped structure along with dynamic response under BNBC response spectrum has been meticulously analyzed considering the mass of each shaped building is same. Comparative study on the maximum displacement of storey and center of mass of different shaped building due to static loading and dynamic response spectrum has been explored. If the total mass doesn't vary too much, the response of any shape building is almost matching. But the end result shows, it's the orthogonal dimensions that makes a structure vulnerable to its’ weak direction. Maintaining the total mass constant, it is possible to construct an irregular shaped building which might behave more like a rectangular building.
Response spectrum analysis, Regular and irregular shaped multi-storey building, Maximum displacement, Center of mass displacement, Building mass
