<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Evaluation results of shear wave attenuation-based ground motion restricted by fracture orientation and rheology, from among those of an extended experimental study, are presented herein. The issues of competence of fractured bedrock dynamically disturbed multilaterally are assessed. Disturbance is primarily modelled by Sh and Sv stimulation, given fracture orientation, while subjected to direct fracture stress regime conditions varying in time. Hence, directionalities of polarisation and stress are taken into consideration simultaneously following simple site-specific non-erodetic approach. Comparison of spectral curves and spectral ratio curves of attenuation with respect to variations of direction and stress emphasise the amplification of the ‘seismic response’ in one direction compared to the other, i.e. vertical vs. horizontal, in terms of weighing possibilities of or predicting structural integrity against failure. The composite analyses of multiple spectral curves not only enable determination of the orientation of the fracture set/s in space but also allow inferring the nature of more amplified response perpendicular to the crack surface compared to that of a response parallel to the crack surface.</p></abstract>

Evaluation results of shear wave attenuation-based ground motion restricted by fracture orientation and rheology, from among those of an extended experimental study, are presented herein. The issues of competence of fractured bedrock dynamically disturbed multilaterally are assessed. Disturbance is primarily modelled by Sh and Sv stimulation, given fracture orientation, while subjected to direct fracture stress regime conditions varying in time. Hence, directionalities of polarisation and stress are taken into consideration simultaneously following simple site-specific non-erodetic approach. Comparison of spectral curves and spectral ratio curves of attenuation with respect to variations of direction and stress emphasise the amplification of the ‘seismic response’ in one direction compared to the other, i.e. vertical vs. horizontal, in terms of weighing possibilities of or predicting structural integrity against failure. The composite analyses of multiple spectral curves not only enable determination of the orientation of the fracture set/s in space but also allow inferring the nature of more amplified response perpendicular to the crack surface compared to that of a response parallel to the crack surface.

Geotechnical Site Investigation Using S-waves with Implications for Ground Motion Analysis

Faculty of Engineering and Applied Science

Materials and Geoenvironment

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Evaluation results of shear wave attenuation-based ground motion restricted by fracture orientation and rheology, from among those of an extended experimental...

Geotechnical Site Investigation Using S-waves with Implications for Ground Motion Analysis

Published Online: Apr 04, 2018

Page range: 205 - 219

Received: Jul 03, 2017

Accepted: Sep 06, 2017

DOI: https://doi.org/10.1515/rmzmag-2017-0018

Keywords
site investigation, attenuation examination, ground motions, S-wave evaluation, seismic amplification

© 2017 Bilal Hassan et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Geotechnical Site Investigation Using S-waves with Implications for Ground Motion Analysis

Published Online: Apr 04, 2018

Page range: 205 - 219

Received: Jul 03, 2017

Accepted: Sep 06, 2017

DOI: https://doi.org/10.1515/rmzmag-2017-0018

Keywordssite investigation, attenuation examination, ground motions, S-wave evaluation, seismic amplification

© 2017 Bilal Hassan et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
site investigation, attenuation examination, ground motions, S-wave evaluation, seismic amplification