Loading and pre-internal force calculation method for flexural member

The invention discloses a loading and pre-internal-force calculation method for a flexural member. The method comprises the steps of acquiring the total load and the pre-load of the flexural member; adjusting the connection state of at least one end of the flexural member to enable the two ends of the flexural member to be in a first connection state, and applying a first load and a preload to beborne by the flexural member in the first connection state; and adjusting at least one end of the flexural member from the first connection state to the second connection state, and removing the preload on the flexural member and applying a second load to the flexural member in the second connection state. The embodiment of the invention provides a loading and pre-internal force calculation methodof a flexural member, which can effectively homogenize the internal force distribution at the two ends and in the middle of the flexural member, thereby improving the stress performance and economy of the flexural member in t