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Seismic vulnerability assessment at urban scale for two typical Swiss cities using Risk-UE methodology

Author

Listed:
  • P. Lestuzzi

    (EPFL-ENAC-IIC-IMAC)

  • S. Podestà

    (University of Genoa)

  • C. Luchini

    (University of Genoa)

  • A. Garofano

    (EPFL-ENAC-IIC-IMAC)

  • D. Kazantzidou-Firtinidou

    (CREALP)

  • C. Bozzano

    (CREALP)

  • P. Bischof

    (EPFL-ENAC-IIC-IMAC)

  • A. Haffter

    (EPFL-ENAC-IIC-IMAC)

  • J.-D. Rouiller

    (CREALP)

Abstract

This paper contains a seismic assessment at urban scale of the cities of Sion and Martigny in Switzerland. These two cities have been identified for the present research based on their importance regarding size and the characteristics of the building stock for which information was available. Moreover, microzonation investigations are available for both cities. This results in a more accurate characterization of local expected ground shaking, which is expressed through specific response spectra. Sion and Martigny represent, respectively, the capital and second largest city of the canton of Valais. This region is characterized by the highest seismicity within Switzerland. The paper focuses on the assessment using Risk-UE methodology, namely the empirical method LM1 and the mechanical method LM2. The obtained results are compared in order to assess the related accuracy. Firstly, buildings of the two cities were surveyed in order to collect main structural characteristics in a database. Building stock is typical of that region and can be found similar to many other medium-sized Swiss cities. Around half of the buildings are unreinforced masonry buildings, while several others are reinforced concrete buildings with shear walls. Results show the most vulnerable part of the cities regarding earthquake. There are significant differences in global results between LM1 and LM2 methods. The mechanical LM2 method is more pessimistic since it predicts damage grades of about one degree higher than LM1 method. However, the main drawback of the empirical LM1 method is that an a priori determination of an adequate value of the macroseismic intensity is required. Nevertheless, LM2 method may lead to a global overestimation of damage prediction.

Suggested Citation

  • P. Lestuzzi & S. Podestà & C. Luchini & A. Garofano & D. Kazantzidou-Firtinidou & C. Bozzano & P. Bischof & A. Haffter & J.-D. Rouiller, 2016. "Seismic vulnerability assessment at urban scale for two typical Swiss cities using Risk-UE methodology," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 84(1), pages 249-269, October.
  • Handle: RePEc:spr:nathaz:v:84:y:2016:i:1:d:10.1007_s11069-016-2420-z
    DOI: 10.1007/s11069-016-2420-z
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    Citations

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    Cited by:

    1. Liangjie Yang & Hainan Yang & Xueyan Zhao & Yongchun Yang, 2022. "Study on Urban Resilience from the Perspective of the Complex Adaptive System Theory: A Case Study of the Lanzhou-Xining Urban Agglomeration," IJERPH, MDPI, vol. 19(20), pages 1-18, October.
    2. Caterina Negulescu & Abed Benaïchouche & Anne Lemoine & Sylvestre Roy & Rodrigo Pedreros, 2020. "Adjustability of exposed elements by updating their capacity for resistance after a damaging event: application to an earthquake–tsunami cascade scenario," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 104(1), pages 753-793, October.
    3. Abdelheq Guettiche & Philippe Guéguen & Mostefa Mimoune, 2017. "Seismic vulnerability assessment using association rule learning: application to the city of Constantine, Algeria," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 86(3), pages 1223-1245, April.
    4. Benedetta Baldassarre & Elisa Conticelli & Angela Santangelo, 2024. "Planning for More Resilient and Safer Cities: A New Methodology for Seismic Risk Assessment at the Urban Scale, Applied to a Case Study in Italy," Sustainability, MDPI, vol. 16(5), pages 1-26, February.
    5. Armando Aguilar-Meléndez & Lluis G. Pujades & Alex H. Barbat & Marisol Monterrubio-Velasco & Josep Puente & Nieves Lantada, 2022. "Comparative analysis of a new assessment of the seismic risk of residential buildings of two districts of Barcelona," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 110(3), pages 1649-1691, February.

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