NEHRP Clearinghouse
- Title
- Simple Shear Behavior of Fine Grained Soils Subjected to Earthquake and Other Repeated Loading.
- File
- PB298123.pdf
- Author(s)
- Zimmie, T. F.; Floess, C. H. L.
- Source
- National Science Foundation, Washington, DC. Engineering and Applied Science., March 1979, 140 p.
- Abstract
- This report contains the results of a laboratory investigation on the behavior of fine grained soils subjected to repeated loads. Emphasis was placed on high strain level repetitive loading such as that caused by earthquakes and storm waves. Consolidated constant volume (CCV) tests were performed using a Norwegian Geotechnical Institute (NGI) direct simple shear device. The NGI device has been modified for cyclic loading capabilities. Because the in situ structure of cohesive soils is an important parameter in determining their behavior, only natural undisturbed soil samples were tested. These included a Gulf of Alaska marine clay from the Copper River prodelta and Concord Blue clay. Test data on the Gulf of Alaska clay include lateral stress measurements. These were made by using calibrated reinforced rubber membranes. The additional information provided by the lateral stress measurements considerably adds to the knowledge of the stress conditions existing in the sample. This aids in the interpretation of test results. Included in this report is a literature review, a discussion of the stress conditions existing in direct simple shear samples, a description of equipment and testing procedures, and the presentation of test results.
- Keywords
- Alaska Gulf; Soil tests; Shear properties; Dynamic response; Earthquake engineering; Soil properties; Liquefaction (Soils); Cyclic loads; Soil mechanics; Earthquakes; Pervious soils