1) The critical loads of linear elastic flexuosity were computed for 64,80 m hoist masts under the condition of inclined steel cable on the top using finite numerical simulation method.

2) At the point of the engineering application, it includes the construction static analysis, construction dynamic analysis, flexuosity analysis, and thermal analysis etc.

3) Catenary assembled single rib arch that carries vertical loadings and was analyzed in this paper, calculation formula of critical loading of lateral stability flexuosity by the energy principle.

4) As an example, calculation of a concrete beam with three-point flexuosity is presented, and the result by calculation is quite same as that by test.

5) The counteraction of superstructure and subjective activity is an important reason emerging disequilibria and flexuosity in the process of society evolution.