Seismic Performance of Asymmetric Buildings

K, Philip Luke (2018) Seismic Performance of Asymmetric Buildings. MTech thesis.

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Abstract

Requirements in aesthetics and functionality has resulted in modern buildings to have complex shapes and thus irregularity in the distribution of mass, stiffness and strength in their design. Asymmetry in plan formed because of the eccentricity between Centre of Mass and Centre of Stiffness in buildings and structures can cause undesired rotation and shall result in lateral-torsional coupling modes. This effect can weaken the buildings under extreme
dynamic loads such as Earthquakes, Tsunamis etc. This vulnerability is further affected by the uncertainty in building parameters such as material, geometry and the distribution of asymmetry. Probabilistic analysis techniques such as fragility curves have been found to be an effective index to determine the seismic response of buildings, but not much study has been done on asymmetric buildings. The present study aims at developing the fragility curves
of mass asymmetric RC buildings using non-linear time history analysis and under varying degrees of eccentricity and building height. The investigation proposes advancement over existing damage parameters with which the vulnerability is measured. Metamodel-based non-statistical stochastic analyses have also been done, where input-output relationships were formed which can almost accurately predict the linear and nonlinear response of
buildings with least computational effort.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Asymmetric Buildings; Nonlinear Response; Seismic Fragility; Metamodel Approach; RC buildings
Subjects:Engineering and Technology > Civil Engineering > Pre stressed Concrete
Engineering and Technology > Civil Engineering > Construction Engineeing
Divisions: Engineering and Technology > Department of Civil Engineering
ID Code:9857
Deposited By:IR Staff BPCL
Deposited On:25 Apr 2019 19:25
Last Modified:25 Apr 2019 19:25
Supervisor(s):Sarkar, Pradip and P, Robin Davis

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