Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Seismic Response of RC Frame with Stiffness Irregularity Under Sequential Loading of Main Shock and Repeated Aftershocks
Recorded data of seismic active regions reveal that most of the earthquake events consist of main shock succeeded by a number of aftershocks. The present code focuses on single earthquake event ignoring the possibility of following consecutive events. The structures designed for single event of earthquake lying in the earthquake prone areas may be severely damaged by main shock and repeating aftershocks. The aftershocks that accompany the main shock take their toll on the seismic demands of the buildings which goes on increasing in each successive event as the building may not be retrofitted or strengthened due to time constraint or some other reason. Along the height of the structure, the irregularity in the distribution of stiffness, mass and strength contribute to the poor performance of the buildings. The current study focuses on the consequences of seismic demands of 11-storey moment-resisting frames with peak ground acceleration 0.36g, 0.40g and 0.45g. The aftershocks considered are of two third of PGA of the main shock. Stiffness irregularity is introduced from considerations of stilt and service floor requirements in the first, second, sixth and top storey. The irregularity has been incorporated reducing the stiffness by 43% and then by 65% at the same storey level. A nonlinear dynamic analysis is carried out on the designed frame that is exposed to time history which is compatible with IS1893:2016. Seismic response has been discussed and compared with response of the main shock.
Seismic Response of RC Frame with Stiffness Irregularity Under Sequential Loading of Main Shock and Repeated Aftershocks
Recorded data of seismic active regions reveal that most of the earthquake events consist of main shock succeeded by a number of aftershocks. The present code focuses on single earthquake event ignoring the possibility of following consecutive events. The structures designed for single event of earthquake lying in the earthquake prone areas may be severely damaged by main shock and repeating aftershocks. The aftershocks that accompany the main shock take their toll on the seismic demands of the buildings which goes on increasing in each successive event as the building may not be retrofitted or strengthened due to time constraint or some other reason. Along the height of the structure, the irregularity in the distribution of stiffness, mass and strength contribute to the poor performance of the buildings. The current study focuses on the consequences of seismic demands of 11-storey moment-resisting frames with peak ground acceleration 0.36g, 0.40g and 0.45g. The aftershocks considered are of two third of PGA of the main shock. Stiffness irregularity is introduced from considerations of stilt and service floor requirements in the first, second, sixth and top storey. The irregularity has been incorporated reducing the stiffness by 43% and then by 65% at the same storey level. A nonlinear dynamic analysis is carried out on the designed frame that is exposed to time history which is compatible with IS1893:2016. Seismic response has been discussed and compared with response of the main shock.
Seismic Response of RC Frame with Stiffness Irregularity Under Sequential Loading of Main Shock and Repeated Aftershocks
Structural Integrity
Fonseca de Oliveira Correia, José António (Herausgeber:in) / Choudhury, Satyabrata (Herausgeber:in) / Dutta, Subhrajit (Herausgeber:in) / Tauheed, Athar (Autor:in) / Alam, Mehtab (Autor:in)
International Conference on Advances in Structural Mechanics and Applications ; 2021 ; Silchar, India
Advances in Structural Mechanics and Applications ; Kapitel: 2 ; 17-38
Structural Integrity ; 26
15.07.2022
22 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Performance of RC Frames with Stiffness Irregularity Under Sequential Ground Motion
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