Long-term non-linear behaviour and buckling of shallow concrete-filled steel tubular arches

► Creep and shrinkage of the concrete core of a shallow CFST arch under a sustained load will occurs. ► This produces a time-dependent change of the nonlinear in-plane buckling load of the CFST arch. ► When the buckling load is equal to the sustained load, the nonlinear buckling will occur. ► Creep and shrinkage of the concrete core also cause a change of equilibrium state of the CFST arch. ► This may lead to excessive deformations of the CFST arch under the sustained load.