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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/nhess-2019-318
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2019-318
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 16 Oct 2019

Submitted as: research article | 16 Oct 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Assessment of the physical vulnerability of buildings affected by slow-moving landslides

Qin Chen1, Lixia Chen2, Lei Gui1, Kunlong Yin1, Dhruba Pikha Shrestha3, Juan Du4, and Xuelian Cao2 Qin Chen et al.
  • 1Engineering Faculty, China University of Geosciences, Wuhan, 430074, China
  • 2Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, 430074, China
  • 3Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Enschede, 7500 AE, the Netherlands
  • 4Three Gorges Research Center for geo-hazard, Ministry of Education, China University of Geosciences, Wuhan, 430074, China

Abstract. Physical vulnerability is a difficult fundamental issue in the risk assessment of slow-moving landslides. We aim to develop a method to analyze the physical vulnerability of buildings affected by slow-moving landslides. We calculate the landslide residual force on the buildings' foundation and the landslide safety factor where the buildings are located using the GEOSTUDIO code and landslide residual thrust method. Further, using Timoshenko's deep beam theory, we analyze the physical response of buildings to understand potential inclination. By applying the modified Weibull function, we fit the physical vulnerability function based on the relation between damage degree and landslide intensity. We simulate three rainfall scenarios by employing the Pearson type III distribution model to evaluate changes in the landslide's residual thrust and corresponding buildings' damage degree. To obtain the contributions of the buildings' characteristics to physical vulnerability, we conduct sensitivity analysis, demonstrating that the building length, foundation depth, and building width are the most critical factors. Two physical vulnerability curve sets are separately generated for four building lengths and five building foundation depths. The proposed method can be applied to establish the physical vulnerability of landslides. The established physical vulnerability curves are used for the quantitative risk assessment of slow-moving landslides.

Qin Chen et al.
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Short summary
Previous studies have focused on generalized vulnerability assessment from landslides or other types of slope failures, such as debris flow and rockfall. The proposed study establishes a three-step approach to investigate the physical vulnerability of buildings affected by slow-moving landslides. Herein, good consistency between the estimated building physical vulnerability and on-field damage evidence was found.
Previous studies have focused on generalized vulnerability assessment from landslides or other...
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