Layer-by-layer assembly loading and pre-internal force calculation method of frame

The invention discloses a method for layer-by-layer assembly, layer-by-layer loading and pre-internal force calculation of a frame. The method comprises the following steps: calculating a total load to be borne by the frame; sequentially assembling each layer of frame of the multi-layer frame, and when the current layer of frame of the multi-layer frame is assembled, adjusting the component node connection state of the current layer of frame to be a first connection state, and applying a first load and a preload corresponding to the current layer of frame to the current layer of frame; adjusting the component node connection state of the current-layer frame from the first connection state to a second connection state, and unloading preload on the current-layer frame; and when the componentnode connection state of each layer of frame of the multi-layer frame is kept in the second connection state, a second load is applied to the multi-layer frame. By adopting the method provided by theinvention, positive and n