大跨越输电塔极限承载力的双重非线性分析

Dual Nonlinear Analysis of the Ultimate Load-Bearing Capacity of Large-span Transmission Tower

通过考虑几何非线性和材料非线性来研究结构大变形以及材料强度富裕度对输电塔承载能力的影响,利用逐步加载的方式对某大跨越输电塔进行极限承载力分析,得到了荷载步—位移曲线以及极限承载力,分析结果表明所用方法是合理的,进行弹塑性分析更能接近输电塔实际结构的承载能力。

Based on allowing for geometric nonlinear and material nonlinear, the impact on the load-bearing capacity of transmission tower put by the large deformation of structure and the rich coefficient of material strength is analyzed. The ultimate load-Bearing capacity of the large-span transmission towers is analyzed by loading step by step, and then the curves of load step-displacement and the ultimate load-bearing capacity are obtained. The results demonstrate that the method is available, and the real bearing capacity of transmission tower can be obtained by the elastic-plastic analysis.