INFLUENCE OF NON-LOAD ACTION ON SUPER HIGH RISE BUILDINGS CONCRETE-FILLED SQUARE STEEL TUBE STRUCTURE

In order to study the influence of non load action on super high-rise buildings, this paper analyzed the monitoring data and ANSYS numerical simulation. Firstly, for CFST columns, ASHREA clear sky model and CEB-FIP (90) prediction model were used to analyze the temperature effect and concrete creep effect respectively. The results showed that the horizontal deformation of the component was affected by the non-uniform temperature field, which decreased with the increase of the cross-section, tended to be gentle when it was larger than 900 mm, and increased rapidly with the increase of the column length. For the analysis of structural level, this paper proposed a simplified calculation method, which was based on the simulation analysis of Building 9 of Jinwan square. It was considered that the influence of non-uniform temperature field of components was only limited to local stress, which had little effect on the whole structure; the temperature and stress monitoring results of Building 9 of Jinwan square were analyzed to verify the above-mentioned finite element simulation results. Through further parameter analysis, it was considered that the construction progress of thick coating fire retardant coating reached more than half of the total height when the structure was capped, and the temperature effect could be properly ignored in the design.