COMPARATIVE ANALYSIS OF A BUILDING UNDER SEISMIC LOADING WITH BARE FRAME AND BASE ISOLATOR IN DIFFERENT ZONES USING STAAD PRO
Author(s):
SOHAILUDDIN QAZI, SUSHANT GAJBHIYE
Keywords:
Seismic loading, Earthquake, Base isolation, Collapse prevention, Foundation, Damping, Vibration Control
Abstract
The main objective of the research work is to compare seismic analysis of building under bare frame and base isolation technique i.e. Rubber base isolation and comparing the effect of earthquake forces on both models. An analysis is carried out by the STAAD. Pro Software. It is a well-known fact that in any code based seismic design approach, the performance objective at design basesearthquake level is preventing the inhabitants of the building and accepting a certain level of damage which may be beyond repair. On the other hand the owners of the buildings have an idea that once a building is designed based on a seismic code the building will suffer no damage. By the introduction of “performance based design philosophy” a new approach has been introduced to earthquake engineering society. In the framework of performance based design the so called performance level which is related to the response of the building is defined for different level of seismic input. The performance levels defined in seismic design approach has basically three levels namely; “immediate occupancy”, “life safety” and “collapse prevention”.Based on this new approach it is possible to design a building that meets the performance levels named above. In order to achieve this “target performance” there are certain design alternatives to be applied one of which is “base isolation”. The basic approach in “seismic isolation design” is to provide additional damping and concentrate the nonlinear response on the isolator units and limit the seismic forces on the structural members above isolation level. This approach provides almost elastic response on the structural members and limits the floor accelerations acting on the nonstructural elements on superstructure. In recent years seismic base isolation applications are increasing especially in health complexes like hospitals which are expected to be functional after a major seismic event.
Article Details
Unique Paper ID: 150093

Publication Volume & Issue: Volume 7, Issue 2

Page(s): 364 - 368
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