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为获得较为理想的输电铁塔建模模型,本文对输电铁塔各种常见螺栓连接节点进行了研究,建立了各种常见螺栓连接节点的简化模型,利用各种构造节点模型来模拟铁塔节点的真实受力情况.文中建立了桁梁模型和考虑构造节点的模型,将其仿真数据与真实实验铁塔进行了比较.结果表明,考虑构造节点的模型的误差明显小些,铁塔主材处两模型的误差值相对变化较小,在斜材、辅材等处,考虑了构造节点的模型比桁梁模型相对于真塔实验值的误差总体明显减小.在一些特殊试验点,误差减小幅度很大,这充分说明了构造节点对铁塔的影响不可忽视,也说明了构造节点模型在铁塔建模中的有效性.
In order to obtain the ideal model of transmission tower, this paper studies various common bolted joints of transmission tower, and establishes a simplified model of various common bolted joints. It simulates the real conditions of the tower nodes by using various structural node models The truss girder model and the model considering the structure node are established in this paper.The simulation data are compared with the real experimental tower.The results show that the error of the model considering the structural node is obviously smaller and the error of the two models Compared with the experimental value of the true tower, the error of the model considering the structure node is obviously smaller than that of the true tower. In some special test points, the error decreases a lot This fully shows that the influence of structural nodes on the tower can not be neglected, and also shows the effectiveness of constructing the node model in the tower modeling.