Abstract
Retrofitting of Reinforced Concrete (RC) pile foundation below integral bridges is an important issue concerning functionality of such bridges in earthquake-prone regions. In the present study, the numerically investigated retrofitting method comprises addition of micropiles along the periphery of the pile caps with jet grouting around each new pile. Initially, the original bridge response is compared with the response of the bridge strengthened at abutment foundation only. Subsequently, retrofitting of pile foundation at specific pier locations is considered along with the abutment foundation strengthened earlier. Under a site-specific ground motion, bridge response for the two cases of strengthening are compared with the response of the original bridge model. Additional RC micropiles around the pile cap, embedded in jet grouting, tend to reduce the extent of nonlinear behavior of bridge piers and foundation piles. The lateral bearing resistance of the grouted soil medium also gets enhanced during possible earthquake shaking.
| Original language | English |
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| Title of host publication | Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019 |
| Editors | Francesco Silvestri, Nicola Moraci |
| Publisher | CRC Press/Balkema |
| Pages | 2111-2119 |
| Number of pages | 9 |
| ISBN (Print) | 9780367143282 |
| State | Published - 2019 |
| Event | 7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 - Rome, Italy Duration: Jan 17 2019 → Jan 20 2019 |
Publication series
| Name | Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019 |
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Conference
| Conference | 7th International Conference on Earthquake Geotechnical Engineering, ICEGE 2019 |
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| Country/Territory | Italy |
| City | Rome |
| Period | 01/17/19 → 01/20/19 |
Funding
The financial assistantship provided by the Ministry of Human Resource Development, Government of India, during the doctoral studies of the first author is gratefully acknowledged.