| Summary |
In the past , tensioned components such as cables were considered as additional stiffeners to improve rigidity of skeletons, and loads were mainly directly given to skeletons. In negatively air pressurized pneumatic structures, air pressure is mainly given to membrane and cables. These tensioned components are possible to stiffen skeletons when they transmit forces to skeletons. In this paper, a concept called external force stiffening method which utilizes tensioned components under load to stiffen skeletons and its numerical scheme are proposed. The principle of this concept is very similar as how tensioned components work in a negatively air pressurized pneumatic structure. Take numerical models of guyed tower and aches as examples, relationships of external force and buckling load are obtained. At last, model experiments are carried out to validate the validity of proposing external force stiffening method and its numerical scheme. |