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Differential Constitutive Equations for Aging Viscoelastic Materials

Lubliner, Jacob; Sackman, Jerome L.

UCB/SESM-1965/09, Dept. of Civil Engineering, University of California, Berkeley, 1965-07, 16 pages (500/C23/65/09)

Constitutive equations for aging viscoelastic materials are formulated as differential equations with variable coefficients. Particular attention is devoted to the second order equation; the creep function is derived and asymptotic behavior is studied. Comparison is made with commonly accepted expressions for creep functions of concrete. Extension to nonlinear behavior is discussed.

Available online: http://nisee.berkeley.edu/documents/SEMM/SEMM-65-09.pdf (984 KB)