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采用B3模型分析了超高层混合结构竖向构件压缩变形、结构变形补偿、构件差异变形及伸臂合拢时间对伸臂内力的影响。研究结果表明:楼板施工前变形可通过控制设计标高得到补偿,而楼板施工后变形要由B3模型计算分析得到,然后进行预补偿;补偿周期较短时,楼板施工后变形最大值出现在中间某层,随着补偿周期的增加,最大值出现楼层呈上移趋势;不同的施工方法,施工验收时的标高误差区别较大,采用设计标高+标高补偿值的施工方法可使标高误差最小;通过混凝土部分的标高补偿和钢构件部分的长度预调整,结构在补偿周期时达到设计标高;标高补偿值具有时变性,补偿周期时标高补偿值为零;伸臂连接时间越迟对伸臂受力越有利。
The B3 model is used to analyze the effect of compression deformation, structural deformation compensation, component deformation and deformation of the vertical members of the super high-rise mixed structure on the internal force of the boom. The results show that the deformation before slab construction can be compensated by controlling the design elevation, while the deformation after slab construction is calculated and calculated by B3 model and then pre-compensated. When the compensation period is short, the maximum deformation occurs after slab construction Layer, with the increase of the compensation period, the floor of the maximum appears upward trend; different construction methods, the difference of the elevation error of construction acceptance is larger, the elevation error can be minimized by using the design elevation + elevation compensation value; The height of the concrete part is adjusted in advance and the length of the steel part is pre-adjusted. The structure reaches the designed elevation during the compensation period. The elevation compensation value is time-varying, and the compensation value of the compensation time scale is zero. The more favorable.