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Influence of local site conditions on strong ground motion characteristics at Tarai region of Uttarakhand, India

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  • Bhavesh Pandey

    (Indian Institute of Technology)

  • Ravi S. Jakka

    (Indian Institute of Technology)

  • Ashok Kumar

    (Indian Institute of Technology)

Abstract

Local site conditions strongly influence the characteristics of strong ground motion. In this study, influence of local site conditions on characteristics of strong ground motion records and their further effects on hazard studies were investigated for the Tarai region of Uttarakhand, India, where the thickness of soil cover varies significantly from few meters to several hundreds of meters. Another importance of these sites is that these sites have strong motion recording stations. Site characterization of each of the strong ground motion station is conducted using MASW tests to obtain shear wave velocity profiles of the sites. Further, site-specific ground response analysis is carried out using SHAKE2000 to investigate local site effects on strong ground motion records. Results clearly show the differences in IS 1893:2002 (Part-1) suggested 5 % damping response spectrum and the one obtained from ground response analyses. For sites having Vs30 around 200 m/s, constant acceleration frequency band is significantly widened in comparison with 5 % damping response spectrum of IS-1893:2002 (Part-1). This study further suggests the importance of thorough site characterization of strong motion instrumentation sites.

Suggested Citation

  • Bhavesh Pandey & Ravi S. Jakka & Ashok Kumar, 2016. "Influence of local site conditions on strong ground motion characteristics at Tarai region of Uttarakhand, India," 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. 81(2), pages 1073-1089, March.
    • Handle: RePEc:spr:nathaz:v:81:y:2016:i:2:d:10.1007_s11069-015-2120-0
    DOI: 10.1007/s11069-015-2120-0
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    References listed on IDEAS

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    1. Ravi Sankar Jakka & Amit Shiuly & Ranjit Das, 2013. "Liquefaction Potential for Kolkata City," International Journal of Geotechnical Earthquake Engineering (IJGEE), IGI Global, vol. 4(2), pages 18-33, July.
    2. L. Govindaraju & S. Bhattacharya, 2012. "Site-specific earthquake response study for hazard assessment in Kolkata city, India," 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. 61(3), pages 943-965, April.
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    Cited by:

    1. Widodo Pawirodikromo, 2020. "Middle value ground acceleration map and site effect in the Merapi sedimentary basin under the 2006 Yogyakarta, Indonesia earthquake," 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. 102(1), pages 419-443, May.

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