Modeling method of large-span prestressed concrete beam reduced scale model

The invention discloses a large-span prestressed concrete beam reduced scale model modeling method, which is characterized in that the stress characteristic of an actual beam is achieved by establishing a reduced scale model beam, and the specific operation comprises the following steps of: reducing the geometric dimension of the actual beam in an equal proportion to ensure that the reinforcement ratios of the sections of common steel bars are the same; deducing a curvilinear equation of the prestressed tendons in the actual beam, determining an equation of the prestressed tendons in the model by using the same method, not considering prestress loss, ensuring that internal force effects generated by the prestress in the actual beam and the model are the same, and determining the number of the prestressed tendons in the model and tension control stress; and then considering the prestress loss to analyze whether the effective prestress effects in the actual beam and the model beam are the same or not, if not, r