NEHRP Clearinghouse
- Title
- Nonlinear Viscoelastic Behavior of a Cohesive Soil under Uniaxial Loading Conditions.
- File
- PB81165573.pdf
- Author(s)
- Rafie, S.; Sharma, M. G.
- Source
- National Science Foundation, Washington, DC. Engineering and Applied Science., September 1980, 98 p.
- Abstract
- The nonlinear viscoelastic behavior of a cohesive soil under uniaxial loading conditions was studied. A constitutive relationship based upon a multiple integral representation was developed. The time dependent parameters of this relation (kernal functions) were determined, performing uniaxial single-step creep tests on a specially developed test apparatus. The constitutive relationship was generalized for multi-step loading, as well as dynamic sinusoidal loading conditions. It was shown that the behavior of the material for multi-step loading conditions can be predicted by the results of the single-step tests. In addition, the behavior of the soil under uniaxial compressive cyclic loading was studied, using an apparatus specially developed for the purpose. The energy dissipation in a given cycle of loading was evaluated. Also, the effect of frequency on the energy loss was studied.
- Keywords
- Dynamic response; Cohesive soils; Earthquake engineering; Soil properties; Cyclic loads; Computer programs; Rheological properties; Loads (Forces); Creep tests; Earthquakes