CONSTRUCTION SIMULATION ON TEMPERATURE EFFECTS OF SUPER-LONG SUPER-WIDE SUPER-RIGID SEAMLESS MULTI-STORY STEEL FRAME WORKSHOP

The whole construction process of a super-long super-wide super-rigid seamless multi-story steel frame workshop was simulated and analyzed by using the finite element program MIDAS Gen. The influence of temperature on the construction process was studied from three aspects:the overall structure, the construction steps and the structural closure. The calculation results showed that the environmental temperature was the key factor in the construction stage, the setting of different temperature segments and the use of different divisional closure sequences had an important influence on the internal force of the overall structure. On this basis, the temperature control range, the overall structure construction partition and the optimal closure mode that meet the structural deformation and stress during the construction stage were proposed. The construction of the overall structure was gradually expanded from the middle part along the length direction and installed symmetrically. The optimal closure mode of steel frame in temperature zone was lifted transverse first, then lifted longitudinally and finally poured concrete floor. Setting closure belt was not necessary in the construction of light-weight roof of steel frame. Pouring the steel-concrete composite floor after completing the steel frame was beneficial to reduce the temperature stress of the overall structure. It was suggested that the temperature control range in the construction stage of the project should be at the initial temperature of 15℃, and the temperature rising/falling should above or below 8℃ fulctuation.