Loading and pre-internal force calculation method for frame structure

The invention discloses a loading and pre-internal-force calculation method for a frame structure. The method comprises the steps of calculating the total load of a transverse component and a second component; adjusting the connection state of at least one node of the transverse member and/or the second member to be a first connection state, applying a first load and a preload, adjusting the connection state of at least one node of the transverse member and/or the second member to be a second connection state, unloading the preload and applying a second load, and based on the first load and the preload, adjusting the connection state to be a second connection state; and calculating the internal force of the frame structure in the first connection state, calculating the internal force of the frame structure in the second connection state based on the unloading preload and the applied second load, and superposing the internal force in the first connection state and the internal force inthe second connection sta