TITLE:
A Comparative Study of Behavior of Multi-Storied Regular and Irregular Buildings under Static and Dynamic Loading
AUTHORS:
Swagato Biswas Ankon
KEYWORDS:
Response Spectrum Method, Regular Plan and Plan Irregularity, Re-Entrant Corners, Story Displacement, Base Shear
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.10 No.4,
December
11,
2020
ABSTRACT: One of the major challenges of constructing any high rise building for
civil engineers is to make it earthquake resistant. This resistance largely
depends on the building’s shape and structural system. A comparative study has
been done in this paper about the seismic behavior and response of buildings
having a regular plan and plan irregularity (re-entrant corners). The 5
building models considered in this study are 15 stories each, the same area and
identical 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 for
Dhaka, Bangladesh (seismic zone 2). Static loads, wind loads and seismic loads
are considered for each model and dynamic response under Bangladesh National
Building Code (BNBC) 2006 response spectrum has been meticulously analyzed. A
comparison for story displacement, base shear, story drift and time period has
been established and explored for dynamic response spectrum among the models.
The results show that buildings with irregularity have a greater value of time
period, drift and displacement and hereby are more susceptible to damage during
an earthquake or disaster.