Equation of Motion for Time Diagrams

M \ddot{u} + D \dot{u} + Ku = p (t)

f_ctd,pl	Design value of concrete axial tensile strength
ε_ca (t, t₀)	Autogenous shrinkage strain
R_d	Design value of resistance
ü	Absolute acceleration
$\dot{u}$	Absolute velocity
u	Absolute displacement
t	Time

Do you have any questions?