Location

St. Louis, Missouri

Presentation Date

12 Mar 1991, 10:30 am - 12:00 pm

Abstract

We present results from cyclic tests conducted in the laboratory using a prototype in situ cyclic torsional cylindrical shear geotechnical testing system. The system is intended to advance our ability to design critical systems to resist earthquakes by improving our ability to analytically predict the behavior of soil-structure-equipment systems during earthquakes. It is to do so by providing, more reliably than we feel is now possible, estimates of the in situ cyclic shear stress vs strain characteristics needed by refined earthquake analyses. These characteristics include 1) resistances to initial liquefaction, cyclic degradation, and large cyclic deformations, and 2) undegraded, nonlinear, inelastic characteristics. The testing system was found to be effective under representative controlled laboratory conditions and promising for field use. Test results were found to be reasonable and consistent with published results of laboratory tests of a high quality. Additionally, we did not observe major limitations or encounter abnormal difficulties.

Department(s)

Civil, Architectural and Environmental Engineering

Meeting Name

2nd International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Publisher

University of Missouri--Rolla

Document Version

Final Version

Rights

© 1991 University of Missouri--Rolla, All rights reserved.

Creative Commons Licensing

Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 11th, 12:00 AM Mar 15th, 12:00 AM

In Situ Torsional Cylindrical Shear Test-Laboratory Results

St. Louis, Missouri

We present results from cyclic tests conducted in the laboratory using a prototype in situ cyclic torsional cylindrical shear geotechnical testing system. The system is intended to advance our ability to design critical systems to resist earthquakes by improving our ability to analytically predict the behavior of soil-structure-equipment systems during earthquakes. It is to do so by providing, more reliably than we feel is now possible, estimates of the in situ cyclic shear stress vs strain characteristics needed by refined earthquake analyses. These characteristics include 1) resistances to initial liquefaction, cyclic degradation, and large cyclic deformations, and 2) undegraded, nonlinear, inelastic characteristics. The testing system was found to be effective under representative controlled laboratory conditions and promising for field use. Test results were found to be reasonable and consistent with published results of laboratory tests of a high quality. Additionally, we did not observe major limitations or encounter abnormal difficulties.