多尺度模型下高压输电钢管塔关键节点失效模式的研究

为探究多尺度模型下高压输电钢管塔关键节点在极端气候条件下的失效模式,以某大跨越直线塔为研究背景,提出了一种在有限元软件ABAQUS中实现不同尺度单元连接的方法,并验证了跨尺度连接的合理性。建立了结构行为一致多尺度输电钢管塔模型,通过对比分析证明了多尺度模型的合理性。对输电塔可能遇到的大风、覆冰、断线三种极端气候工况进行了数值模拟,通过对数值模拟结果的分析,得到了不同工况下输电塔关键节点的失效模式,为高压输电钢管塔的设计和维修加固提供了可靠的依据。

Study on The Failure Mode of Key Nodes on High Voltage Transmission Steel Tube Tower Under Multi-scale Model

To explore the failure mode of high voltage transmission steel tube tower key nodes under multi-scale model in extreme climatic conditions, the research, taking a large crossing tower as the research background, proposes a method to achieve connection of different scale units with the finite element software ABAQUS,and verify the rationality of the multi-scale connection. Build the multi-scale transmission steel tube tower model of structure behavior agreement, and prove the rationality of the multi-scale model through the contrast analysis. Make numerical simulations on three kinds of extreme climates conditions: wind, ice covered and wire wire broken fracture, and obtain the failure modes of transmission tower key nodes under different working conditions based on the analysis of simulated results. The research would provide a reliable basis for the design, maintenance and reinforcement of high voltage transmission steel tube towers.