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Influence of Mainshock Aftershock Sequences on the Seismic Vulnerability of Bridges in India
The primary focus of this study is on the generation of artificial mainshock-aftershock ground motion for the seismic vulnerability assessment of bridges in the Himalayan region of India. For this purpose, first a collection of ground motion records for mainshocks is chosen based on the seismic activity in the region. A record database of real recorded mainshock-aftershock sequences is compiled, and linear model is developed to establish a relationship among the mainshock and aftershock ground motions. This model is then utilized to select aftershocks for the chosen mainshocks records, creating artificial mainshock-aftershock sequences. For the Himalayan region, a highway bridge is chosen for case-study and a comprehensive FE model is generated. A sequence of non-linear time-history analyses are conducted at different scaled levels of ground motion intensity to develop seismic fragility curves. Results demonstrates that the median fragility estimates for the complete damage state exhibit a 26% reduction when considering mainshock-aftershock sequences compared to only mainshock records.
Influence of Mainshock Aftershock Sequences on the Seismic Vulnerability of Bridges in India
The primary focus of this study is on the generation of artificial mainshock-aftershock ground motion for the seismic vulnerability assessment of bridges in the Himalayan region of India. For this purpose, first a collection of ground motion records for mainshocks is chosen based on the seismic activity in the region. A record database of real recorded mainshock-aftershock sequences is compiled, and linear model is developed to establish a relationship among the mainshock and aftershock ground motions. This model is then utilized to select aftershocks for the chosen mainshocks records, creating artificial mainshock-aftershock sequences. For the Himalayan region, a highway bridge is chosen for case-study and a comprehensive FE model is generated. A sequence of non-linear time-history analyses are conducted at different scaled levels of ground motion intensity to develop seismic fragility curves. Results demonstrates that the median fragility estimates for the complete damage state exhibit a 26% reduction when considering mainshock-aftershock sequences compared to only mainshock records.
Influence of Mainshock Aftershock Sequences on the Seismic Vulnerability of Bridges in India
Lecture Notes in Civil Engineering
Goel, Manmohan Dass (editor) / Kumar, Ratnesh (editor) / Gadve, Sangeeta S. (editor) / Kumar, Vikram (author) / Gangwar, Mayank (author) / Shekhar, Shivang (author)
Structural Engineering Convention ; 2023 ; Nagpur, India
2024-05-03
9 pages
Article/Chapter (Book)
Electronic Resource
English
Seismic vulnerability assessment of RC skew bridges subjected to mainshock-aftershock sequences
| British Library Online Contents | 2018
Seismic vulnerability assessment of RC skew bridges subjected to mainshock-aftershock sequences
| British Library Online Contents | 2018
| British Library Conference Proceedings | 2018