Undrained Soil Behavior under Bidirectional Shear

Yao Li, Yunming Yang, Hai Sui Yu, Gethin Roberts

Research output: Journal PublicationConference articlepeer-review

2 Citations (Scopus)


In practice, the soil is subject to more than one shear stress in many cases. For instance, the soil in an embankment is subject to a static shear stress along sloping direction, and the sloping direction is usually different from the direction of an earthquake loading. Therefore, there is a necessity to investigate undrained soil behaviors under shear stresses along multiple directions. This paper employs the first commercially available bidirectional direct simple shear apparatus (VDDCSS) to investigate the soil responses of Leighton Buzzard sand under two directional shear stresses. Sand samples are first subject to a static shear stress under drained conditions along different directions from 0° to 180°, followed by a monotonic or cyclic shear stress along 0° until failure occurs. In static tests, the soil strength is the lowest when the angle between these two shear stresses is near 90°, and the strength is the highest at 0°. In addition, a smaller angle leads to a more brittle response, and a greater angle leads to a more ductile response. In dynamic tests, liquefaction resistance is decreased from the angle of 0° to 90°, and then increased from 90° to 180°.

Original languageEnglish
Pages (from-to)232-239
Number of pages8
JournalGeotechnical Special Publication
Issue number265 GSP
Publication statusPublished - 2016
Event4th Geo-China International Conference: In Situ and Laboratory Test Methods for Site Characterization, Design, and Quality Control, Geo-China 2016 - Shandong, China
Duration: 25 Jul 201627 Jul 2016

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology


Dive into the research topics of 'Undrained Soil Behavior under Bidirectional Shear'. Together they form a unique fingerprint.

Cite this