输电线路角钢塔加劲肋倾斜角度对塔脚板受力性能的影响研究

Research on Influence of Tilt Angle of Stiffening Rib of Angle Steel Tower on Force Performance of Tower Footplate in Transmission Line

现有架空输电线路杆塔结构的规程规范未明确角钢塔塔脚板加劲肋倾斜角度布置要求,通常按习惯和经验设定。依托500 kV交流及±800 kV特高压直流输电线路工程铁塔,通过有限元数值方法研究了单主材四地螺、单主材八地螺和双主材八地螺塔脚板在加劲肋不同倾斜角度下的受力性能。研究结果表明,加劲肋倾斜角度的改变对四地螺塔脚板的影响较小,但是对八地螺塔脚板影响相对较大。所研究成果对架空输电线路角钢塔塔脚板计算和制图都有一定的指导作用。

The existing regulations and specifications for tower structure of overhead transmission line do not specify the arrangement requirements for tilt angle of stiffening rib of angle steel tower footplate,which are usually set according to customs and experiences.Relying on the towers of 500 kV AC and±800 kV UHVDC transmission line project,the force performance of tower footplate with single main material and four anchor bolts,single main material and eight anchor bolts and double main material and eight anchor bolts under different tilt angles is analyzed by finite element numerical method.The analysis results show that the change of tilt angle of stiffening ribs has a small effect on tower footplate with four anchor bolts,but has a relatively large effect on tower footplate with eight anchor bolts.The research results play a certain guiding role in the calculation and drafting for angle steel tower footplate of overhead transmission line.