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Research paper thumbnail of Seismic Evaluation of Vertically Irregular Steel Moment-Resisting Frames Under Mainshock–Aftershock Vibration

Journal of Vibration Engineering & Technologies

This study investigates the seismic performance of vertical irregular steel moment-resisting fram... more This study investigates the seismic performance of vertical irregular steel moment-resisting frames subjected to mainshock–aftershock (MS–AS) seismic sequence. The building structures situated in a seismically active region experience sequence of earthquakes during their lifetime. These seismic sequences have the potential to increase the damage state of the structures. The irregular building structures are present due to availability of space, functional and architectural requirements etc. behave differently as compared to the regular buildings during earthquakes. In this paper, three steel-moment resisting frames having different configuration i.e. 3, 6, and 9-storey were considered as a reference regular frame. Three vertical irregularities-stiffness, strength and combined stiffness and strength are introduced in three different locations (bottom, mid-height, and topmost storey) along the height of each building frames. These regular and vertically irregular frames are subjected to mainshocks alone and artificial MS–AS seismic sequences that are generated by using the repeated and randomized approach. The nonlinear time-history analysis is performed using computer software SAP 2000 on regular and irregular building frames subjected to mainshocks and MS–AS seismic sequence. The comparison between the seismic performance of vertically irregular and regular frames subjected to mainshocks alone and MS–AS seismic sequences shows that the vertical irregular frames have a significant effect on the distribution of mean interstorey drift demands along the height of building frames. The effect of MS–AS seismic sequence on seismic demands of vertical irregular and regular frames have been increased compared to mainshocks. However, the repeated seismic sequences show smaller structural responses relative to the randomized seismic sequences.

Research paper thumbnail of Pre Engineering Building as a Modern Era: A Review

International Journal for Research in Applied Science and Engineering Technology, 2022

Research paper thumbnail of Evaluation of seismic performance of steel frames with stiffness irregularity subjected to mainshock–aftershock using equivalent single-degree-of-freedom system

Innovative Infrastructure Solutions

Research paper thumbnail of Seismic behaviour of stiffness irregular steel frames under mainshock–aftershock

Asian Journal of Civil Engineering

Research paper thumbnail of A Bayesian Probabilistic Approach to Structural Health Monitoring

Some general issues associated with on-line structural health monitoring are discussed. In order ... more Some general issues associated with on-line structural health monitoring are discussed. In order to address the problem of determining the existence and location of damage in the presence of uncertainties, a global model-based structural health monitoring method which utilizes Bayesian probabilistic inference is developed. The results of tests using simulated data are described.

Research paper thumbnail of Seismic Evaluation of Vertically Irregular Steel Moment-Resisting Frames Under Mainshock–Aftershock Vibration

Journal of Vibration Engineering & Technologies

This study investigates the seismic performance of vertical irregular steel moment-resisting fram... more This study investigates the seismic performance of vertical irregular steel moment-resisting frames subjected to mainshock–aftershock (MS–AS) seismic sequence. The building structures situated in a seismically active region experience sequence of earthquakes during their lifetime. These seismic sequences have the potential to increase the damage state of the structures. The irregular building structures are present due to availability of space, functional and architectural requirements etc. behave differently as compared to the regular buildings during earthquakes. In this paper, three steel-moment resisting frames having different configuration i.e. 3, 6, and 9-storey were considered as a reference regular frame. Three vertical irregularities-stiffness, strength and combined stiffness and strength are introduced in three different locations (bottom, mid-height, and topmost storey) along the height of each building frames. These regular and vertically irregular frames are subjected to mainshocks alone and artificial MS–AS seismic sequences that are generated by using the repeated and randomized approach. The nonlinear time-history analysis is performed using computer software SAP 2000 on regular and irregular building frames subjected to mainshocks and MS–AS seismic sequence. The comparison between the seismic performance of vertically irregular and regular frames subjected to mainshocks alone and MS–AS seismic sequences shows that the vertical irregular frames have a significant effect on the distribution of mean interstorey drift demands along the height of building frames. The effect of MS–AS seismic sequence on seismic demands of vertical irregular and regular frames have been increased compared to mainshocks. However, the repeated seismic sequences show smaller structural responses relative to the randomized seismic sequences.

Research paper thumbnail of Pre Engineering Building as a Modern Era: A Review

International Journal for Research in Applied Science and Engineering Technology, 2022

Research paper thumbnail of Evaluation of seismic performance of steel frames with stiffness irregularity subjected to mainshock–aftershock using equivalent single-degree-of-freedom system

Innovative Infrastructure Solutions

Research paper thumbnail of Seismic behaviour of stiffness irregular steel frames under mainshock–aftershock

Asian Journal of Civil Engineering

Research paper thumbnail of A Bayesian Probabilistic Approach to Structural Health Monitoring

Some general issues associated with on-line structural health monitoring are discussed. In order ... more Some general issues associated with on-line structural health monitoring are discussed. In order to address the problem of determining the existence and location of damage in the presence of uncertainties, a global model-based structural health monitoring method which utilizes Bayesian probabilistic inference is developed. The results of tests using simulated data are described.

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