Jintai Wang, Ph.D. (Virginia) coauthored a paper entitled "Time-Dependent Cone Penetration Resistance of a Postliquefaction Sand Deposit at Shallow Depth" that will be published in the Journal of Geotechnical and Geoenvironmental Engineering in Volume 145, Issue 6 in June 2019.
Jintai was the lead author, and his coauthors were Ming Xiao, Jeffrey C. Evans, Tong Qiu, and Sajjad Salam.
Jintai specializes in geotechnical engineering and soil liquefaction, with experience focused on projects such as retaining walls, reinforced soil slopes, and slope stability and settlement problems spanning a wide variety of geographic areas and geologic conditions. He has experience planning and performing subsurface exploration using drilling methods, as well as performing geotechnical and project risk assessments and proposing mitigation alternatives.
The Journal of Geotechnical and Geoenvironmental Engineering covers the broad area of practice known as geotechnical engineering. Papers are on topics such as foundations, retaining structures, soil dynamics, engineering behavior of soil and rock, site characterization, slope stability, dams, rock engineering, earthquake engineering, environmental geotechnics, geosynthetics, computer modeling, groundwater monitoring and restoration, and coastal and geotechnical ocean engineering. Authors also submit papers on new and emerging topics within the general discipline of geotechnical engineering.
The Journal of Geotechnical and Geoenvironmental Engineering is one of the American Society of Civil Engineers (ASCE) Publications. The technical and professional journals of the Society are the media through which independent researchers report their experiences and the results of their studies for the advancement of the civil engineering profession. Technical content is carefully peer-reviewed for possible publication in one of ASCE's journals and periodicals.
AbstractThe liquefaction resistance of postliquefaction sand is time-dependent and still largely unknown. In this paper, the time-dependent liquefaction resistance of a postliquefaction sand deposit is studied using 1-g shake table experimental modeling and piezocone penetration testing (CPTu). A uniform liquefiable sand deposit was air-pluviated and fully saturated in a large laminar shear box (L×W×H:2.29×2.13×1.83mL×W×H: 2.29×2.13×1.83 m). The sand deposit was subjected to a shaking event in the laminar shear box. Piezometers were embedded at different depths to capture the seismic response of liquefied sand. The measured excess pore pressures were used to verify the occurrence of liquefaction. A series of CPTu tests were conducted to measure the cone penetration resistance, friction resistance, and pore water pressure throughout the depth of the sand deposit prior to shaking and at different elapsed times following the shaking. To capture the sand aging effect after liquefaction, CPTu tests were done at different locations over a total elapsed time of 135 days. This research found that the cone penetration resistance of the sand deposit decreased significantly immediately after liquefaction compared with that before liquefaction. The cone penetration resistance of the postliquefaction sand deposit increased with time; a relationship between cone penetration resistance and time at different effective stresses is proposed. This research suggests that even a short period of time might have a significant effect on soil properties; aging time between earthquake and field tests cannot be neglected and should be documented for better data interpretation.
Learn more about the article: https://ascelibrary.org/doi/10.1061/%28ASCE%29GT.1943-5606.0002049
Learn more about the journal: https://ascelibrary.org/journal/jggefk
Learn more about Juntas: https://www.linkedin.com/in/jwangengr/