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电网技术  2010 

输电铁塔冷弯角钢构件轴心受压承载力分析及试验研究

, PP. 194-199

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Abstract:

在输电线路铁塔应用冷弯型钢,可以提高我国输电铁塔设计水平,降低钢材用量。结合输电铁塔的结构特点,选取不同截面、不同长细比的冷弯角钢构件进行轴心受压承载力试验和有限元分析,得到了输电铁塔用冷弯角钢轴心受压构件的荷载—应变发展规律和极限承载力,并与现行设计规范承载力计算值进行对比。分析结果表明,现行规范体系不适合我国输电铁塔冷弯型钢轴心受压构件的强度设计。通过对试验和理论分析结果进行拟合,确定了输电铁塔冷弯型钢轴心受压构件稳定系数曲线,提出了输电铁塔冷弯型钢构件承载力计算的修正意见,为冷弯型钢在我国输电铁塔中的应用提供了参考和依据。

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