Loading and node connecting method of secondary self-reaction force structure

The invention discloses a loading and node connecting method of a secondary self-reaction force structure. The secondary self-reaction force structure comprises flanges and webs. The method comprises the following steps of adjusting the connecting state of the flanges and the webs at two symmetrical nodes of the secondary self-reaction force structure, so that the flanges and the webs at the two symmetrical nodes of the secondary self-reaction force structure are movably arranged, and applying a first load to the secondary self-reaction force structure; and adjusting the connecting state of the flanges and the webs at the two symmetrical nodes of the secondary self-reaction force structure again, so that the flanges and the webs at the two symmetrical nodes of the secondary self-reaction force structure are adjusted from a movably arranged state to a fixedly arranged state, and applying a second load to the secondary self-reaction force structure, wherein the sum of the first load and the second load is equal