Presented is a generalization of time-independent nonlinear triaxial constitutive relations for concrete to model short-time viscoelastic effects. The effect of strain-rate magnitude upon the initial elastic modulus, the peak stress, and the sharpness of the stress peak is taken into account. To obtain a model that also exhibits short-time rapid creep and stress relaxation, the incrementally linear consititutive law fully characterized by tangential moduli is replaced by a nonlinear first-order differential equation in stress, strain, stress rate and strain rate.
|Original language||English (US)|
|Number of pages||19|
|Journal||Journal of the Engineering Mechanics Division|
|State||Published - Oct 1 1982|
ASJC Scopus subject areas
- Environmental Science(all)
- Earth and Planetary Sciences(all)