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Combination of dispersion curves from MASW measurements

Combination of dispersion curves from MASW measurements


Title: Combination of dispersion curves from MASW measurements
Author: Ólafsdóttir, Elín Ásta   orcid.org/0000-0002-9166-8406
Bessason, Bjarni   orcid.org/0000-0002-7963-0763
Erlingsson, Sigurdur   orcid.org/0000-0002-4256-3034
Date: 2018-10
Language: English
Scope: 473-487
University/Institute: Háskóli Íslands
University of Iceland
School: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Department: Umhverfis- og byggingarverkfræðideild (HÍ)
Faculty of Civil and Environmental Engineering (UI)
Series: Soil Dynamics and Earthquake Engineering;113
ISSN: 0267-7261
DOI: 10.1016/j.soildyn.2018.05.025
Subject: Multichannel analysis of surface waves; MASW; Dispersion curves; Measurement profile configuration; Combination; Stacking; Uncertainty analysis; Confidence intervals; Bootstrap; Jarðskjálftaverkfræði
URI: https://hdl.handle.net/20.500.11815/1283

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Citation:

Olafsdottir, E. A., Bessason, B., & Erlingsson, S. (2018). Combination of dispersion curves from MASW measurements. Soil Dynamics and Earthquake Engineering, 113, 473-487. doi:https://doi.org/10.1016/j.soildyn.2018.05.025

Abstract:

Multichannel analysis of surface waves (MASW) is a seismic exploration method for determination of near-surface shear wave velocity profiles based on analysis of horizontally travelling Rayleigh waves. This paper aims to propose a methodology and recommendations for combining dispersion data from several multichannel records. The dispersion curves are added up within logarithmically spaced wavelength intervals and the uncertainty of the mean phase velocity estimates is evaluated by using classical statistics and the bootstrap. The results indicate that combining multiple dispersion curves, which have been gathered by receiver spreads of different lengths (but with the same midpoint), can increase the investigation depth of the survey, improve its resolution at shallow depth and overall improve the reliability of the results as compared to the use of a single record. Moreover, the uncertainty of the combined mean dispersion curve can be determined and further used to present the shear wave velocity profile with upper and lower boundaries.

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).

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