Method and system for intelligently determining closure temperature of large-span structure based on structural strain energy

The invention discloses a method and system for intelligently determining the closure temperature of a large-span structure based on structural strain energy, and relates to the field of structural engineering. The method comprises the following steps: calculating first strain energy according to a first environment; calculating second strain energy according to the second environment; a large-span structure closure time period is determined, a closure temperature is obtained through mapping, and third strain energy of the overall structure is calculated; the third strain energy is combined with the first strain energy and the second strain energy, and a first strain energy difference value and a second strain energy difference value of the overall structure are obtained through calculation; calculating to obtain a target function, and outputting a variable strain energy difference value; extracting a target strain energy difference value of the target component in the overall structure in the variable strain