Location
St. Louis, Missouri
Presentation Date
14 Mar 1991, 2:00 pm - 3:30 pm
Abstract
The displacements and rates of displacement of slopes post-rupture are influenced by the dynamic response of soils. Pre-existing shear surfaces at or close to residual strength are frequently present in slopes of clay and weak mudstone, due to previous slope movement or tectonic disturbance. Knowledge of the strength of such surfaces under rapid loading is necessary of stability during and after an earthquake is to be examined. To obtain such data, high speed displacement controlled ring shear tests have been performed, on samples after being pre-sheared to residual conditions. With the results from those tests, suitable constitutive laws were derived for the soils and numerical analysis were made of an old landslide submitted to dynamic earthquake loading. Analysis were also performed for first landslides, on plastic clays, in order to calculate the maximum velocity, displacement and duration of sliding. The calculation is based on the assumption that the whole moving mass is displaced as a single rigid body with resistance mobilised along the sliding surface. Newmark's sJjding block was used, sliding on a nonlinear surface involving a resistance dependent on factors such as displacement and rate of slip.
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
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
Recommended Citation
Lemos, L. J. L. and Coelho, P. A. L. F., "Displacements of Slopes Under Earthquake Loading" (1991). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 12.
https://scholarsmine.mst.edu/icrageesd/02icrageesd/session07/12
Included in
Displacements of Slopes Under Earthquake Loading
St. Louis, Missouri
The displacements and rates of displacement of slopes post-rupture are influenced by the dynamic response of soils. Pre-existing shear surfaces at or close to residual strength are frequently present in slopes of clay and weak mudstone, due to previous slope movement or tectonic disturbance. Knowledge of the strength of such surfaces under rapid loading is necessary of stability during and after an earthquake is to be examined. To obtain such data, high speed displacement controlled ring shear tests have been performed, on samples after being pre-sheared to residual conditions. With the results from those tests, suitable constitutive laws were derived for the soils and numerical analysis were made of an old landslide submitted to dynamic earthquake loading. Analysis were also performed for first landslides, on plastic clays, in order to calculate the maximum velocity, displacement and duration of sliding. The calculation is based on the assumption that the whole moving mass is displaced as a single rigid body with resistance mobilised along the sliding surface. Newmark's sJjding block was used, sliding on a nonlinear surface involving a resistance dependent on factors such as displacement and rate of slip.
