Incremental Dynamic Analysis (IDA) of Flat Slab Structures
C A Prasad, Director, METEY Engineering and Consultancy Pvt. Ltd.
Dr. G. D. Awachat, Associate Professor, Civil Engineering Department, SGGSIE&T, Vishnupuri, Nanded
S. A. Kadam, (MTech), SGGSIE&T, Vishnupuri, Nanded
A new methodology is essential to understand the response of structure when subjected to nonlinear dynamic loadings like earthquake, tsunami, hurricanes etc. Incremental dynamic analysis (IDA) is the powerful tool which will enable to simulate the connection between ground motion and structural response assessment. IDA is computational method developed to provide the results of conditional probability seismic hazard analysis in order to define the seismic capacities of structure under the seismic loading. IDA is carried out by performing non-linear dynamic analysis by considering the suite of earthquake ground motions and scaling each ground motion to several levels of its intensity. Postprocessing the results of each analysis will give the graph of Intensity measure versus Engineering Demand parameter which is known as Incremental Dynamic Analysis Curve. Flat slab RC structures are being preferred over the conventional RC structures. As Flat slab RC building will provide various advantages over the conventional Beam Column RC frame like higher floor to floor height, ease in installation of mechanical & electrical services etc. A ten-story flat slab with perimeter beam structure is modelled using the analytical software ETABS 19. As flat slab structures are vulnerable to earthquake forces, thus IDA curves are developed to analyse the structure and results presented.
Dr. G. D. Awachat, Associate Professor, Civil Engineering Department, SGGSIE&T, Vishnupuri, Nanded
S. A. Kadam, (MTech), SGGSIE&T, Vishnupuri, Nanded
A new methodology is essential to understand the response of structure when subjected to nonlinear dynamic loadings like earthquake, tsunami, hurricanes etc. Incremental dynamic analysis (IDA) is the powerful tool which will enable to simulate the connection between ground motion and structural response assessment. IDA is computational method developed to provide the results of conditional probability seismic hazard analysis in order to define the seismic capacities of structure under the seismic loading. IDA is carried out by performing non-linear dynamic analysis by considering the suite of earthquake ground motions and scaling each ground motion to several levels of its intensity. Postprocessing the results of each analysis will give the graph of Intensity measure versus Engineering Demand parameter which is known as Incremental Dynamic Analysis Curve. Flat slab RC structures are being preferred over the conventional RC structures. As Flat slab RC building will provide various advantages over the conventional Beam Column RC frame like higher floor to floor height, ease in installation of mechanical & electrical services etc. A ten-story flat slab with perimeter beam structure is modelled using the analytical software ETABS 19. As flat slab structures are vulnerable to earthquake forces, thus IDA curves are developed to analyse the structure and results presented.
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NBM&CW October 2021
