English：

To address the challenges posed by multiple large⁃span, cantilevered steel structuresdistributed across various locations in a comprehensive service building project⁃which resulted in complexlifting operations and intricate structural forces⁃a refined construction process simulation technique wasintroduced. Utilizing Midas Gen finite element software, in⁃depth studies were conducted on the liftingsequence, temporary support jig framework design, and support removal procedures to ensureconstruction safety and quality. Tower crane standard sections were employed as temporary supportformwork in accordance with the characteristics of the cantilevered area. The pre⁃lifting camber valuesand hoisting parameters for steel components were determined through simulation analysis. The timingrelationship between concrete slab pouring and temporary support removal was critically analyzed toestablish an optimal schedule for support removal. Results indicate that adopting an “inside⁃to⁃outside”staged transfer sequence⁃prioritizing removal of inner supports followed by gradual, phased removal ofouter supports after internal forces have stabilized⁃can effectively control structural deflection. Thisapproach ensures a safe and stable transition of the structural system.