Closure for discussion of: "A further study of flexural-torsional buckling of elastic arches"

The non-conservativeness of hydrostatic loads and their conservativeness on the pin-ended arches, are described. The assumed criteria can examine whether a load system has a potential, and is used to investigate the three load cases of conventional radial loads, hydrostatic loads, and radial loads directed to the arch center during deformation. It was found that the radial loads for all three load cases are conservativeness. The classical buckling analysis methods can be considered as a particular case of dynamic methods, and so dynamic methods can be used for conservative problems.