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Abstract
Relative performances of a lead rubber bearing (LRB) and a friction pendulum isolation system (FPS), for a school in Kathmandu are assessed. As a result of the 2015 Gorkha earthquake, the feasibility of implementing seismic isolation on schools in Kathmandu is investigated. Kathmandu is situated in a lacustrine basin, which results in the amplification of longer period spectral ordinates. This was clearly observed in ground motion waveforms recorded during the 2015 event in the Kathmandu basin. A school is designed in the area of Bhaktapur (in the Kathmandu basin) in accordance with local and international regulations and practices. Two isolation systems are designed and compared (i.e., LRB and FPS). The two isolation systems are nonlinearly modelled in the structural analysis opensource software OpenSees and time-history analyses (THA) are carried out considering different ground motions. Two sets of ground motions are considered: (i) a code-conforming ground motion selection and (ii) a number of recordings from the Kathmandu Valley. Both isolation techniques reduce the seismic demand of the structure and make it compliant to international standards. The interaction between the typical long period basin amplification in the Kathmandu valley and the fundamental periods of the isolated structures is the key point of comparison, leading to quantitative comparisons on the applicability of base isolation techniques in basin contexts and near-source regions such as Kathmandu Valley.
Original language | English |
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Title of host publication | ICONHIC2019 Proceedings |
Publisher | National Technical University of Athens |
Number of pages | 11 |
Publication status | Published - 23 Jun 2019 |
Event | 2nd International Conference on Natural Hazards & Infrastructure | 23 – 26 June 2019 | Chania, GREECE - Chania, Greece Duration: 23 Jun 2019 → 26 Jun 2019 https://iconhic.com/2019/ |
Publication series
Name | |
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Publisher | National Technical University of Athens |
ISSN (Print) | 2623-4513 |
Conference
Conference | 2nd International Conference on Natural Hazards & Infrastructure | 23 – 26 June 2019 | Chania, GREECE |
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Abbreviated title | ICONHIC 2019 |
Country/Territory | Greece |
City | Chania |
Period | 23/06/19 → 26/06/19 |
Internet address |
Keywords
- Seismic Isolation
- Lead Rubber Bearing
- Friction Pendulum System
- Nepal
- Kathmandu Valley
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Dive into the research topics of 'Performance comparison of lead rubber bearing and friction pendulum isolation systems on a school in Kathmandu'. Together they form a unique fingerprint.Projects
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SAFER Seismic safety and resilience of schools in Nepal
Sextos, A. (Principal Investigator), De Luca, F. (Co-Investigator), Vardanega, P. J. (Co-Investigator), Agarwal, J. (Co-Investigator), Alexander, N. A. (Co-Investigator) & Werner, M. (Co-Investigator)
1/05/17 → 30/06/21
Project: Research, Parent