转角塔基础预偏研究

Research of the basic pre-biased value of angle tower

为研究转角塔最佳基础预偏值及设预偏之后铁塔的内力以及挠曲的变化规律,利用分析软件ANSYS建立铁塔未设预偏以及设预偏的有限元模型,通过对2种模型在荷载的长期效应组合作用下加载的结果进行分析和对比,找出铁塔的内力及挠曲变化的规律,并且研究了不同转角度数对铁塔的内力及塔顶位移的影响规律。不仅为转角塔的设计提供了依据,而且找出的最佳基础预偏值能指导施工,保证了组塔后铁塔不向内角倾斜,降低了倒塔断线的概率。

In order to study the optimal basic pre - biased value of angle tower and the change law of internal force and deflection after the pre -biased value set, this paper establishes the finite element models with and without pre - biased value by ANSYS. Through the comparison and analysis of the loading results of the two models under the long - term effect of load, the change law of internal force and deflection is discovered and the law of the influence of angle degrees on internal force and displacement of tower is studied. The study, not only providing evidence for angle tower design, but working out the optimal basic pre-biased value as well which is referential to the construc-tion,prevents the tower from tilt inward and reduces the probability of disconnection.